Classe DefaultTableModel e o método addRow

[Miguel_Avila]

p ackage viewProjetoTeste1;

import java.awt.event.KeyEvent;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;

/**
 *
 * @author Miguel
 */
public class Tela_InserirProd extends javax.swing.JDialog {

    /**
     * Creates new form Tela_InserirProd
     */
    private DefaultTableModel tabela; 
    SaveInfos save = new SaveInfos();
   
    
    public Tela_InserirProd(java.awt.Frame parent, boolean modal) {
        super(parent, modal);
        initComponents();
        
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        txtQtd = new javax.swing.JTextField();
        jLabel3 = new javax.swing.JLabel();
        txtProd = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton();
        jLabel4 = new javax.swing.JLabel();
        lblProduto = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);

        jLabel1.setText("Quantidade");

        jLabel2.setFont(new java.awt.Font("Arial", 1, 11)); // NOI18N
        jLabel2.setText("Inserir um Produto na Tabela");

        txtQtd.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                txtQtdActionPerformed(evt);
            }
        });

        jLabel3.setText("Código");

        txtProd.addFocusListener(new java.awt.event.FocusAdapter() {
            public void focusLost(java.awt.event.FocusEvent evt) {
                txtProdFocusLost(evt);
            }
        });
        txtProd.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyPressed(java.awt.event.KeyEvent evt) {
                txtProdKeyPressed(evt);
            }
            public void keyTyped(java.awt.event.KeyEvent evt) {
                txtProdKeyTyped(evt);
            }
        });

        jButton1.setForeground(new java.awt.Color(0, 102, 0));
        jButton1.setText("Salvar");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jLabel4.setText("Produto:");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jLabel2))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(22, 22, 22)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addComponent(jButton1)
                            .addComponent(jLabel4, javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                                    .addComponent(lblProduto, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                    .addComponent(jLabel3, javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(txtProd, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 131, Short.MAX_VALUE))
                                .addGap(18, 18, 18)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(txtQtd, javax.swing.GroupLayout.PREFERRED_SIZE, 137, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addComponent(jLabel1))))))
                .addContainerGap(38, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(14, 14, 14)
                .addComponent(jLabel2)
                .addGap(65, 65, 65)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jLabel1)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(txtQtd, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                        .addComponent(jLabel3)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(txtProd, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addGap(18, 18, 18)
                .addComponent(jLabel4)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(lblProduto, javax.swing.GroupLayout.PREFERRED_SIZE, 16, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(jButton1)
                .addGap(37, 37, 37))
        );

        pack();
        setLocationRelativeTo(null);
    }// </editor-fold>                        

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
       
       save.salvarInfo(lblProduto.getText(), txtQtd.getText());
       save.juncao();
    }                                        

    private void txtQtdActionPerformed(java.awt.event.ActionEvent evt) {                                       
        //null talvez
    }                                      

    private void txtProdKeyPressed(java.awt.event.KeyEvent evt) {                                   
        
        txtProd.setFocusTraversalKeysEnabled(false);
        if (evt.getKeyCode() == KeyEvent.VK_TAB) {
            int n = Integer.parseInt(txtProd.getText());
            System.out.println(n);
            switch (n) {
                case 40005:
                    txtProd.setFocusTraversalKeysEnabled(true);
                    lblProduto.setText("Leite");
                break;
                case 60001:
                    txtProd.setFocusTraversalKeysEnabled(true);
                    lblProduto.setText("Mussarela");
                break;
                case 30003:
                    txtProd.setFocusTraversalKeysEnabled(true);
                    
                    lblProduto.setText("Requeijão barra");
                break;
                default:
                    JOptionPane.showMessageDialog(this, "Produto Invalido!");
                break;
            }
        }
    }                                  

    private void txtProdKeyTyped(java.awt.event.KeyEvent evt) {                                 
        //null
    }                                

    private void txtProdFocusLost(java.awt.event.FocusEvent evt) {                                  
        // TODO add your handling code here:
    }                                 
  
    
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(Tela_InserirProd.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Tela_InserirProd.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Tela_InserirProd.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Tela_InserirProd.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the dialog */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                Tela_InserirProd dialog = new Tela_InserirProd(new javax.swing.JFrame(), true);
                dialog.addWindowListener(new java.awt.event.WindowAdapter() {
                    @Override
                    public void windowClosing(java.awt.event.WindowEvent e) {
                        System.exit(0);
                    }
                });
                dialog.setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel lblProduto;
    private javax.swing.JTextField txtProd;
    private javax.swing.JTextField txtQtd;
    // End of variables declaration                   

    public JButton getjButton1() {
        return jButton1;
    }

    public void setjButton1(JButton jButton1) {
        this.jButton1 = jButton1;
    }

-> esse é o jDialog (o método que importa no caso é o
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt))

[Miguel_Avila]

public class SaveInfos {
    //Atributos
    private String pd;
    private String qt;
    private DefaultTableModel tabl;
    
    //Métodos
    public void salvarInfo(String x, String y) {
        setPd(x);
        setQt(y);
        System.out.println(pd + qt);
    }
    
    public void juncao() {
        Tela_InserirProd botao = new Tela_InserirProd(null, true);
        ProjetoTelaPrincipal table = new ProjetoTelaPrincipal();
 
       
        table.fazerOprcs(getPd(), getQt());
        
    }
    
    //Métodos Especiais

    public String getPd() {
        return pd;
    }

    public void setPd(String pd) {
        this.pd = pd;
    }

    public String getQt() {
        return qt;
    }

    public void setQt(String qt) {
        this.qt = qt;
    }

-> essa é a classe que junta o jDialog e o jFrame

[Miguel_Avila]

public void fazerOprcs(String a, String b) {
        Object[] dados = {a, b};
        System.out.println(dados[0] +" "+ dados[1]);
        DefaultTableModel dtmProdutos = (DefaultTableModel) tblProd.getModel();
        dtmProdutos.addRow(dados);
    }

-> esse é o método do jFrame pra adicionar na tabela

[staroski]

essa é a classe que junta o jDialog e o jFrame

    public void juncao() {
        Tela_InserirProd botao = new Tela_InserirProd(null, true);
        ProjetoTelaPrincipal table = new ProjetoTelaPrincipal();
 
       
        table.fazerOprcs(getPd(), getQt());
        
    }

O seu método juncao está criando um novo objeto da classe Tela_InserirProd e um novo objeto da classe ProjetoTelaPrincipal.

[Miguel_Avila]

Ss, eu esqueci de apagar, mas isso não ta dando erro, tinha criado ate pra tentar resolver o problema mas não deu

[Miguel_Avila]

o erro que esta dando mesmo é que ele ta chamando o método fazerOprcs(getPd(), getQt()); mas não ta rodando a parte de dtmProdutos.addRow(dados); mesmo rodando o método sem dar erro.

[staroski]

ele ta chamando o método fazerOprcs(getPd(), getQt()); mas não ta rodando a parte de dtmProdutos.addRow(dados);

É porque está executando o método em um objeto diferente.

Está claro pra você a diferença entre objeto e classe?

Você está criando dois objetos da classe ProjetoTelaPrincipal, isso está errado.

Você deveria chamar o método no objeto ProjetoTelaPrincipal que abriu o SaveInfos.

Mas ao invés disso, no SaveInfos você cria um novo objeto ProjetoTelaPrincipal e está chamando o método nele.

[Miguel_Avila]

acho que agora entendi vou testar aqui

[Miguel_Avila]

o que testei não deu certo, não entendi uma parte da sua resposta: Você deveria chamar o método no objeto ProjetoTelaPrincipal que abriu o SaveInfos . o abrir SaveInfos seria um objeto de SaveInfos em outra Classe que roda um método de SaveInfos?

[staroski]

abrir SaveInfos seria um objeto de SaveInfos rodar um método dele em outra Classe?

Não.

No seu método main você tem esse código aqui:

// aqui está criando o PRIMEIRO objeto da classe Tela_InserirProd
Tela_InserirProd dialog = new Tela_InserirProd(new javax.swing.JFrame(), true);
dialog.addWindowListener(new java.awt.event.WindowAdapter() {
    @Override
    public void windowClosing(java.awt.event.WindowEvent e) {
        System.exit(0);
    }
});
dialog.setVisible(true);

E na classe SaveInfos você faz isso:

public void juncao() {
    // aqui está criando um SEGUNDO objeto da classe Tela_InserirProd
    // está errado, deveria acessar o objeto que já foi criado antes
    Tela_InserirProd botao = new Tela_InserirProd(null, true);
    ProjetoTelaPrincipal table = new ProjetoTelaPrincipal();
    table.fazerOprcs(getPd(), getQt());
}

[Miguel_Avila]

entendi (disso não sabia) mas eu apaguei essa linha e mesmo assim, ele roda o método junção(), roda o metodo de table.fazerOprcs(getPd(), getQt()); mas não roda o dtmProdutos.addRow(dados);

[staroski]

mesmo assim, ele roda o método junção(), roda o metodo de table.fazerOprcs(getPd(), getQt()); mas não roda o dtmProdutos.addRow(dados);

É que você também criou um novo objeto da classe ProjetoTelaPrincipal e está chamando o método fazerOprcs nessa segunda instância e não na primeira.

Faz o seguinte: Posta o código completo das 3 classes.

[Miguel_Avila]

Eu estava pensando em uma solução, tem um botão na Classe ProjetoTelaPrincipal que é o “inserir”, ele está com esse código:

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
       ins.setVisible(true);
    }   

ai oque eu fiz mandei rodar a seguinte linha:

Object[] dados = {"a", "b"};
        DefaultTableModel dtmProdutos = (DefaultTableModel) tblProd.getModel();
        dtmProdutos.addRow(dados);

-> dentro desse botão, ou seja, quando apertasse o botão inserir ele iria abrir o jDialog ( ins.setVisible(true) e em seguida acrescentar ‘a’ na primeira coluna do jTable e ‘b’ na segunda, e desse jeito funcionou e ele acrescentou. ai fui olhar oque tinha de diferente nesse método em relação ao fazerOpcrcs, e tem o encapsulamento que nesse método é private e no fazerOpcrcs é public (mas acho que isso não muda o funcionamento) e tem também essa linha “java.awt.event.ActionEvent evt” e acho que é isso que faz ele rodar ou não o método addRow. Você acha que é isso que está faltando pra ele rodar?

[Miguel_Avila]

bl

[Miguel_Avila]

-> Classe ProjetoTelaPrincipal parte 1

   package viewProjetoTeste1;

import java.awt.CardLayout;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.table.DefaultTableModel;

/**
 *
 * @author Miguel
 */
public class ProjetoTelaPrincipal extends javax.swing.JFrame {

    Projeto_TelaCalculadora calc = new Projeto_TelaCalculadora(this, true);
    Projeto_TelaLogin login = new Projeto_TelaLogin(this, true);
    Tela_InserirProd ins = new Tela_InserirProd(this, true);
    
    SaveInfos save2 = new SaveInfos();
    
    
    public ProjetoTelaPrincipal() {
        initComponents();
        this.setTitle("Programa teste");
    }
    

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        popup1 = new javax.swing.JPopupMenu();
        jMenuItem4 = new javax.swing.JMenuItem();
        popup2 = new javax.swing.JPopupMenu();
        calcx = new javax.swing.JMenuItem();
        sair = new javax.swing.JMenuItem();
        jPanelPai = new javax.swing.JPanel();
        jPanel1 = new javax.swing.JPanel();
        jScrollPane1 = new javax.swing.JScrollPane();
        parede = new javax.swing.JPanel();
        jPanel4 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jFormattedTextField1 = new javax.swing.JFormattedTextField();
        jFormattedTextField2 = new javax.swing.JFormattedTextField();
        jComboBox1 = new javax.swing.JComboBox<>();
        jPanel5 = new javax.swing.JPanel();
        jLabel5 = new javax.swing.JLabel();
        jLabel6 = new javax.swing.JLabel();
        jLabel7 = new javax.swing.JLabel();
        jFormattedTextField3 = new javax.swing.JFormattedTextField();
        jFormattedTextField4 = new javax.swing.JFormattedTextField();
        jTextField2 = new javax.swing.JTextField();
        jPanel2 = new javax.swing.JPanel();
        welcome = new javax.swing.JLabel();
        textoDiretorio = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton();
        jScrollPane2 = new javax.swing.JScrollPane();
        parede2 = new javax.swing.JPanel();
        lblArquivo = new javax.swing.JLabel();
        jPanel3 = new javax.swing.JPanel();
        jScrollPane3 = new javax.swing.JScrollPane();
        tblProd = new javax.swing.JTable();
        jButton2 = new javax.swing.JButton();
        jButton3 = new javax.swing.JButton();
        jButton4 = new javax.swing.JButton();
        jMenuBar1 = new javax.swing.JMenuBar();
        jMenu1 = new javax.swing.JMenu();
        jMenuItem1 = new javax.swing.JMenuItem();
        jMenuItem2 = new javax.swing.JMenuItem();
        jMenuItem3 = new javax.swing.JMenuItem();

        popup1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseReleased(java.awt.event.MouseEvent evt) {
                popup1MouseReleased(evt);
            }
        });

        jMenuItem4.setText("Sair");
        jMenuItem4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem4ActionPerformed(evt);
            }
        });
        popup1.add(jMenuItem4);

        popup2.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseReleased(java.awt.event.MouseEvent evt) {
                popup2MouseReleased(evt);
            }
        });

        calcx.setText("Calculadora");
        calcx.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                calcxActionPerformed(evt);
            }
        });
        popup2.add(calcx);

        sair.setText("Sair");
        sair.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                sairActionPerformed(evt);
            }
        });
        popup2.add(sair);

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setResizable(false);
        addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseReleased(java.awt.event.MouseEvent evt) {
                formMouseReleased(evt);
            }
        });

        jPanelPai.setLayout(new java.awt.CardLayout());

        jScrollPane1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseReleased(java.awt.event.MouseEvent evt) {
                jScrollPane1MouseReleased(evt);
            }
        });

        jPanel4.setBorder(javax.swing.BorderFactory.createTitledBorder("Dados Pessoais"));

        jLabel1.setText("Nome");

        jLabel2.setText("CPF");

        jLabel3.setText("Data de Nascimento");

        jLabel4.setText("Sexo");

        try {
            jFormattedTextField1.setFormatterFactory(new javax.swing.text.DefaultFormatterFactory(new javax.swing.text.MaskFormatter("##/##/####")));
        } catch (java.text.ParseException ex) {
            ex.printStackTrace();
        }

        try {
            jFormattedTextField2.setFormatterFactory(new javax.swing.text.DefaultFormatterFactory(new javax.swing.text.MaskFormatter("###.###.###.##")));
        } catch (java.text.ParseException ex) {
            ex.printStackTrace();
        }

        jComboBox1.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "Selecione", "Masculino", "Feminino" }));

        javax.swing.GroupLayout jPanel4Layout = new javax.swing.GroupLayout(jPanel4);
        jPanel4.setLayout(jPanel4Layout);
        jPanel4Layout.setHorizontalGroup(
            jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel4Layout.createSequentialGroup()
                .addGap(18, 18, 18)
                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel4Layout.createSequentialGroup()
                        .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 261, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addContainerGap(236, Short.MAX_VALUE))
                    .addGroup(jPanel4Layout.createSequentialGroup()
                        .addComponent(jLabel2)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(jLabel4)
                        .addGap(119, 119, 119))
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel4Layout.createSequentialGroup()
                        .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addGroup(javax.swing.GroupLayout.Alignment.LEADING, jPanel4Layout.createSequentialGroup()
                                .addComponent(jFormattedTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 99, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, 96, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addGroup(javax.swing.GroupLayout.Alignment.LEADING, jPanel4Layout.createSequentialGroup()
                                .addComponent(jLabel1)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(jLabel3)
                                    .addComponent(jFormattedTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 96, javax.swing.GroupLayout.PREFERRED_SIZE))))
                        .addGap(47, 47, 47))))
        );
        jPanel4Layout.setVerticalGroup(
            jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel4Layout.createSequentialGroup()
                .addGap(21, 21, 21)
                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(jPanel4Layout.createSequentialGroup()
                        .addComponent(jLabel1)
                        .addGap(5, 5, 5)
                        .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(jPanel4Layout.createSequentialGroup()
                        .addComponent(jLabel3)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jFormattedTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 44, Short.MAX_VALUE)
                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(jLabel4))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jFormattedTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(49, 49, 49))
        );

        jPanel5.setBorder(javax.swing.BorderFactory.createTitledBorder("Contato"));

        jLabel5.setText("Telefone");

        jLabel6.setText("Celular");

        jLabel7.setText("E-MAIL");

        try {
            jFormattedTextField3.setFormatterFactory(new javax.swing.text.DefaultFormatterFactory(new javax.swing.text.MaskFormatter("(##)####-####")));
        } catch (java.text.ParseException ex) {
            ex.printStackTrace();
        }

        try {
            jFormattedTextField4.setFormatterFactory(new javax.swing.text.DefaultFormatterFactory(new javax.swing.text.MaskFormatter("(##)#####-####")));
        } catch (java.text.ParseException ex) {
            ex.printStackTrace();
        }

        javax.swing.GroupLayout jPanel5Layout = new javax.swing.GroupLayout(jPanel5);
        jPanel5.setLayout(jPanel5Layout);
        jPanel5Layout.setHorizontalGroup(
            jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel5Layout.createSequentialGroup()
                .addGap(26, 26, 26)
                .addGroup(jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                        .addComponent(jLabel7)
                        .addComponent(jLabel6)
                        .addComponent(jLabel5)
                        .addComponent(jFormattedTextField3)
                        .addComponent(jFormattedTextField4, javax.swing.GroupLayout.DEFAULT_SIZE, 113, Short.MAX_VALUE))
                    .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 262, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(131, Short.MAX_VALUE))
        );
        jPanel5Layout.setVerticalGroup(
            jPanel5Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel5Layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jLabel5)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jFormattedTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jLabel6)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jFormattedTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(20, 20, 20)
                .addComponent(jLabel7)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(15, Short.MAX_VALUE))
        );

        javax.swing.GroupLayout paredeLayout = new javax.swing.GroupLayout(parede);
        parede.setLayout(paredeLayout);
        paredeLayout.setHorizontalGroup(
            paredeLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(paredeLayout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
            .addGroup(paredeLayout.createSequentialGroup()
                .addGap(56, 56, 56)
                .addComponent(jPanel5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        paredeLayout.setVerticalGroup(
            paredeLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(paredeLayout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jPanel5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

[Miguel_Avila]

-> Classe ProjetoTelaPrincipal parte 2

jScrollPane1.setViewportView(parede);

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 547, Short.MAX_VALUE)
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 444, Short.MAX_VALUE)
        );

        jPanelPai.add(jPanel1, "card1");

        welcome.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        welcome.setText("0");

        jButton1.setText("Arquivo");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jScrollPane2.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseReleased(java.awt.event.MouseEvent evt) {
                jScrollPane2MouseReleased(evt);
            }
        });

        javax.swing.GroupLayout parede2Layout = new javax.swing.GroupLayout(parede2);
        parede2.setLayout(parede2Layout);
        parede2Layout.setHorizontalGroup(
            parede2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(lblArquivo, javax.swing.GroupLayout.DEFAULT_SIZE, 523, Short.MAX_VALUE)
        );
        parede2Layout.setVerticalGroup(
            parede2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(lblArquivo, javax.swing.GroupLayout.DEFAULT_SIZE, 375, Short.MAX_VALUE)
        );

        jScrollPane2.setViewportView(parede2);

        javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jScrollPane2)
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addComponent(textoDiretorio)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addComponent(jButton1))
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createSequentialGroup()
                        .addGap(0, 0, Short.MAX_VALUE)
                        .addComponent(welcome, javax.swing.GroupLayout.PREFERRED_SIZE, 169, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(162, 162, 162)))
                .addContainerGap())
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(welcome)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(textoDiretorio, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jButton1))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollPane2))
        );

        jPanelPai.add(jPanel2, "card2");

        tblProd.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "Produto", "Quantidade"
            }
        ));
        jScrollPane3.setViewportView(tblProd);

        jButton2.setText("Inserir");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
            }
        });

        jButton3.setText("Excluir");

        jButton4.setText("Alterar");

        javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
        jPanel3.setLayout(jPanel3Layout);
        jPanel3Layout.setHorizontalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jScrollPane3, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 547, Short.MAX_VALUE)
            .addGroup(jPanel3Layout.createSequentialGroup()
                .addGap(28, 28, 28)
                .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 117, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(29, 29, 29)
                .addComponent(jButton4, javax.swing.GroupLayout.PREFERRED_SIZE, 117, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(28, 28, 28)
                .addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 117, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        jPanel3Layout.setVerticalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel3Layout.createSequentialGroup()
                .addComponent(jScrollPane3, javax.swing.GroupLayout.DEFAULT_SIZE, 392, Short.MAX_VALUE)
                .addGap(18, 18, 18)
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton2)
                    .addComponent(jButton3)
                    .addComponent(jButton4))
                .addContainerGap())
        );

        jPanelPai.add(jPanel3, "card3");

        jMenu1.setText("Infos");
        jMenu1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenu1ActionPerformed(evt);
            }
        });

        jMenuItem1.setText("Painel 1");
        jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem1ActionPerformed(evt);
            }
        });
        jMenu1.add(jMenuItem1);

        jMenuItem2.setText("Painel 2");
        jMenuItem2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem2ActionPerformed(evt);
            }
        });
        jMenu1.add(jMenuItem2);

        jMenuItem3.setText("Painel 3");
        jMenuItem3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem3ActionPerformed(evt);
            }
        });
        jMenu1.add(jMenuItem3);

        jMenuBar1.add(jMenu1);

        setJMenuBar(jMenuBar1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jPanelPai, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jPanelPai, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );

        pack();
        setLocationRelativeTo(null);
    }// </editor-fold>                        

    private void jMenu1ActionPerformed(java.awt.event.ActionEvent evt) {                                       
        
    }                                      

    private void jMenuItem2ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        
        if (!"usuario".equals(this.login.log) && !"123".equals(this.login.sen)) {
        login.setVisible(true);
        }
        
        if (this.login.log.equals("usuario") && this.login.sen.equals("123")) {
        welcome.setText("Bem Vindo Usuário!!!");
        CardLayout p1 = (CardLayout) jPanelPai.getLayout();
        p1.show(jPanelPai, "card2");
        }
        
    }                                          

    private void formMouseReleased(java.awt.event.MouseEvent evt) {                                   
        

        //popup menu do painel 2
        if (evt.isPopupTrigger() == true && jPanel2.isVisible() == true) {
            int num = (int) (this.getSize().getHeight() - (int) jPanel2.getSize().getHeight());
            popup1.show(jPanel2, evt.getX(), evt.getY() - num + 5);
            }
      
    }                                  

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
       
        JFileChooser arq = new JFileChooser(); //instancia um objeto da classe JFileChooser.
        arq.setDialogTitle("Arquivo"); //muda o titulo para 'Arquivo'.
        arq.setFileSelectionMode(JFileChooser.FILES_ONLY); //diz que so pode escolher oque for arquivo.
        //FILES_ONLY = so arquivos
        
        FileNameExtensionFilter filtro = new FileNameExtensionFilter(null, "txt", "jpg", "jpeg", "png"); //\/
        //-> mostra só os nomes das extenssões passadas como parametro para a Classe.
        arq.setFileFilter(filtro); //fala pro Chooser mostrar só arquivos com aquelas extenssões.
        int retornar = arq.showOpenDialog(this); // fala pra mostrar a tela do Chooser nesta (this) Classe.
        
        if (retornar == JFileChooser.APPROVE_OPTION) { //APPROVE_OPTION, quando clicar em abir      
            File abrir = arq.getSelectedFile(); //getSelectedFile(), pegar o arquivo selecionado
            textoDiretorio.setText(abrir.getPath()); //getPath(), pegar o endereço (diretório) dele. ex: C:\arquivo\\imagem1
                
                
                String ExtensionName = this.nomeExtensao(abrir.getName()); //pegar o nome da extenssão do arquivo
                System.out.println("-> "+ ExtensionName);
                
                Path caminho = Paths.get(abrir.getPath());
                String leitura = "";
                    try {
                        byte[] texto = Files.readAllBytes(caminho); //Pegar o texto de um .txt
                        leitura = new String(texto);
                    } catch (Exception erro) {
               
                    }
                
                lblArquivo.setVerticalAlignment(SwingConstants.TOP); //alinhamento vertical do texto
                lblArquivo.setText("");
                lblArquivo.setIcon(null);
                if (ExtensionName.equals("txt")) {
                    lblArquivo.setText("<html> "+leitura+" </html>"); //pular linha no jlabel
                } else if (ExtensionName.equals("jpg") || 
                        ExtensionName.equals("jpeg") || 
                        ExtensionName.equals("png")) {
                    ImageIcon image = new ImageIcon(abrir.getPath());
                    image.setImage(image.getImage().getScaledInstance(lblArquivo.getWidth(), lblArquivo.getHeight(), 1));
                    //-> getScaledInstance: faz um redimensinamento padrão por meio dos parametros width e heigth.
                    lblArquivo.setIcon(image);
                }
        }
    }                                        

    private void jMenuItem4ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        System.exit(0);
        //popup manu sair do painel 2
    }                                          

    private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        
        CardLayout p2 = (CardLayout) jPanelPai.getLayout();
        p2.show(jPanelPai, "card1");
    }                                          

    private void popup2MouseReleased(java.awt.event.MouseEvent evt) {                                     
        // null
    }                                    

    private void popup1MouseReleased(java.awt.event.MouseEvent evt) {                                     
        // null
    }                                    

    private void calcxActionPerformed(java.awt.event.ActionEvent evt) {                                      
        
        calc.setVisible(true);
    }                                     

    private void sairActionPerformed(java.awt.event.ActionEvent evt) {                                     
        
        System.exit(0);
    }                                    

    private void jScrollPane1MouseReleased(java.awt.event.MouseEvent evt) {                                           
        if (evt.isPopupTrigger() == true && jPanel1.isVisible() == true) {
            //Menu Popup do painel 1
                if (evt.isPopupTrigger() == true) {
                popup2.show(parede, evt.getX(), evt.getY());
                }
        }
    }                                          

    private void jScrollPane2MouseReleased(java.awt.event.MouseEvent evt) {                                           
        //popup menu do painel 2
        if (evt.isPopupTrigger() == true && jPanel2.isVisible() == true) { 
            popup1.show(parede2, evt.getX(), evt.getY());
            }
    }                                          

    private void jMenuItem3ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        
        CardLayout tb = (CardLayout) jPanelPai.getLayout();
        tb.show(jPanelPai, "card3");
    }                                          

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
       ins.setVisible(true);
    }                                        

    public String nomeExtensao(String nome) {
        
        if (nome.contains(".")) {
            return nome.substring(nome.lastIndexOf(".") + 1);
        } else {
            return "";
        }
    }

    public void fazerOprcs(String a, String b) {
        Object[] dados = {a, b};
        System.out.println(dados[0] +" "+ dados[1]);
        DefaultTableModel dtmProdutos = (DefaultTableModel) tblProd.getModel();
        dtmProdutos.addRow(dados);
    }
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(ProjetoTelaPrincipal.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(ProjetoTelaPrincipal.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(ProjetoTelaPrincipal.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(ProjetoTelaPrincipal.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new ProjetoTelaPrincipal().setVisible(true);
            }
        });
        
    }

    // Variables declaration - do not modify                     
    private javax.swing.JMenuItem calcx;
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JButton jButton3;
    private javax.swing.JButton jButton4;
    private javax.swing.JComboBox<String> jComboBox1;
    private javax.swing.JFormattedTextField jFormattedTextField1;
    private javax.swing.JFormattedTextField jFormattedTextField2;
    private javax.swing.JFormattedTextField jFormattedTextField3;
    private javax.swing.JFormattedTextField jFormattedTextField4;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JLabel jLabel6;
    private javax.swing.JLabel jLabel7;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenuBar jMenuBar1;
    private javax.swing.JMenuItem jMenuItem1;
    private javax.swing.JMenuItem jMenuItem2;
    private javax.swing.JMenuItem jMenuItem3;
    private javax.swing.JMenuItem jMenuItem4;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JPanel jPanel3;
    private javax.swing.JPanel jPanel4;
    private javax.swing.JPanel jPanel5;
    private javax.swing.JPanel jPanelPai;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JScrollPane jScrollPane3;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextField jTextField2;
    private javax.swing.JLabel lblArquivo;
    private javax.swing.JPanel parede;
    private javax.swing.JPanel parede2;
    private javax.swing.JPopupMenu popup1;
    private javax.swing.JPopupMenu popup2;
    private javax.swing.JMenuItem sair;
    private javax.swing.JTable tblProd;
    private javax.swing.JTextField textoDiretorio;
    private javax.swing.JLabel welcome;
    // End of variables declaration                   

    public JTable getTblProd() {
        return tblProd;
    }

    public void setTblProd(JTable tblProd) {
        this.tblProd = tblProd;
    }
    
    
}

[Miguel_Avila]

-> Classe Tela_InserirProd (jDialog)

package viewProjetoTeste1;

import java.awt.event.KeyEvent;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;

/**
 *
 * @author Miguel
 */
public class Tela_InserirProd extends javax.swing.JDialog {

    /**
     * Creates new form Tela_InserirProd
     */
    private DefaultTableModel tabela; 
    SaveInfos save = new SaveInfos();
   
    
    public Tela_InserirProd(java.awt.Frame parent, boolean modal) {
        super(parent, modal);
        initComponents();
        
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        txtQtd = new javax.swing.JTextField();
        jLabel3 = new javax.swing.JLabel();
        txtProd = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton();
        jLabel4 = new javax.swing.JLabel();
        lblProduto = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);

        jLabel1.setText("Quantidade");

        jLabel2.setFont(new java.awt.Font("Arial", 1, 11)); // NOI18N
        jLabel2.setText("Inserir um Produto na Tabela");

        txtQtd.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                txtQtdActionPerformed(evt);
            }
        });

        jLabel3.setText("Código");

        txtProd.addFocusListener(new java.awt.event.FocusAdapter() {
            public void focusLost(java.awt.event.FocusEvent evt) {
                txtProdFocusLost(evt);
            }
        });
        txtProd.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyPressed(java.awt.event.KeyEvent evt) {
                txtProdKeyPressed(evt);
            }
            public void keyTyped(java.awt.event.KeyEvent evt) {
                txtProdKeyTyped(evt);
            }
        });

        jButton1.setForeground(new java.awt.Color(0, 102, 0));
        jButton1.setText("Salvar");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jLabel4.setText("Produto:");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jLabel2))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(22, 22, 22)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addComponent(jButton1)
                            .addComponent(jLabel4, javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                                    .addComponent(lblProduto, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                    .addComponent(jLabel3, javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(txtProd, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 131, Short.MAX_VALUE))
                                .addGap(18, 18, 18)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(txtQtd, javax.swing.GroupLayout.PREFERRED_SIZE, 137, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addComponent(jLabel1))))))
                .addContainerGap(38, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(14, 14, 14)
                .addComponent(jLabel2)
                .addGap(65, 65, 65)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jLabel1)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(txtQtd, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                        .addComponent(jLabel3)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(txtProd, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addGap(18, 18, 18)
                .addComponent(jLabel4)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(lblProduto, javax.swing.GroupLayout.PREFERRED_SIZE, 16, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(jButton1)
                .addGap(37, 37, 37))
        );

        pack();
        setLocationRelativeTo(null);
    }// </editor-fold>                        

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
       
       save.salvarInfo(lblProduto.getText(), txtQtd.getText());
       save.juncao();
    }                                        

    private void txtQtdActionPerformed(java.awt.event.ActionEvent evt) {                                       
        //null talvez
    }                                      

    private void txtProdKeyPressed(java.awt.event.KeyEvent evt) {                                   
        
        txtProd.setFocusTraversalKeysEnabled(false);
        if (evt.getKeyCode() == KeyEvent.VK_TAB) {
            int n = Integer.parseInt(txtProd.getText());
            System.out.println(n);
            switch (n) {
                case 40005:
                    txtProd.setFocusTraversalKeysEnabled(true);
                    lblProduto.setText("Leite");
                break;
                case 60001:
                    txtProd.setFocusTraversalKeysEnabled(true);
                    lblProduto.setText("Mussarela");
                break;
                case 30003:
                    txtProd.setFocusTraversalKeysEnabled(true);
                    
                    lblProduto.setText("Requeijão barra");
                break;
                default:
                    JOptionPane.showMessageDialog(this, "Produto Invalido!");
                break;
            }
        }
    }                                  

    private void txtProdKeyTyped(java.awt.event.KeyEvent evt) {                                 
        //null
    }                                

    private void txtProdFocusLost(java.awt.event.FocusEvent evt) {                                  
        // TODO add your handling code here:
    }                                 
  
    
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(Tela_InserirProd.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Tela_InserirProd.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Tela_InserirProd.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Tela_InserirProd.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the dialog */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                Tela_InserirProd dialog = new Tela_InserirProd(new javax.swing.JFrame(), true);
                dialog.addWindowListener(new java.awt.event.WindowAdapter() {
                    @Override
                    public void windowClosing(java.awt.event.WindowEvent e) {
                        System.exit(0);
                    }
                });
                dialog.setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel lblProduto;
    private javax.swing.JTextField txtProd;
    private javax.swing.JTextField txtQtd;
    // End of variables declaration                   

    public JButton getjButton1() {
        return jButton1;
    }

    public void setjButton1(JButton jButton1) {
        this.jButton1 = jButton1;
    }
    
}

[Miguel_Avila]

-> Classe SaveInfos

package viewProjetoTeste1;

import javax.swing.table.DefaultTableModel;

public class SaveInfos {
    //Atributos
    private String pd;
    private String qt;
    private DefaultTableModel tabl;
    
    //Métodos
    public void salvarInfo(String x, String y) {
        setPd(x);
        setQt(y);
        System.out.println(pd + qt);
    }
    
    public void juncao() {
        ProjetoTelaPrincipal table = new ProjetoTelaPrincipal();
        table.fazerOprcs(getPd(), getQt());
        
    }
    
    //Métodos Especiais

    public String getPd() {
        return pd;
    }

    public void setPd(String pd) {
        this.pd = pd;
    }

    public String getQt() {
        return qt;
    }

    public void setQt(String qt) {
        this.qt = qt;
    }
}

[staroski]

Apaga a classe SaveInfos, não precisa dela.

Na classe Tela_InserirProd apaga o método main, só a classe ProjetoTelaPrincipal vai ter o método main.

Na classe Tela_InserirProd cria o seguinte atributo:

private final ProjetoTelaPrincipal telaPrincipal;

Na classe Tela_InserirProd apaga esse construtor:

public Tela_InserirProd(java.awt.Frame parent, boolean modal) {
    super(parent, modal);
    initComponents();
}

Na classe Tela_InserirProd cria esse construtor:

public Tela_InserirProd(ProjetoTelaPrincipal telaPrincipal, boolean modal) {
    super(telaPrincipal, modal);
    this.telaPrincipal = telaPrincipal;
    initComponents();
}

Na classe Tela_InserirProd implementa o jButton1ActionPerformed dessa forma:

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
    telaPrincipal.fazerOprcs(lblProduto.getText(), txtQtd.getText());
}

DICAS:

• Programe de forma orientada à objetos
• Utilize o padrão de projeto MVC
• Não use DefaultTableModel
• Crie o seu próprio TableModel estendendo o AbstractTableModel.

[Miguel_Avila]

Obrigado ajudou muito, de verdade, aprendi bastante coisa