JDesktopPane + JInternalFrame

Programação Java
#1

Olá galera!

tenho duas classes…

/*
 * JanPrinc.java
 *
 * Created on 27 de Agosto de 2007, 19:57
 */

package br.com.amigos.gui;

import java.beans.PropertyVetoException;
import java.sql.Connection;

public class JanPrinc extends javax.swing.JFrame {
    
    /** Creates new form JanPrinc */
    public JanPrinc(Connection p_conn) {
        initComponents();
        setExtendedState(MAXIMIZED_BOTH);
        setVisible(true);
        this.conn = p_conn;
    }
    
    /** 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.
     */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">                          
    private void initComponents() {
        jDesktopPane1 = new javax.swing.JDesktopPane();
        jMenuBar2 = new javax.swing.JMenuBar();
        jMenu2 = new javax.swing.JMenu();
        jMenuItem1 = new javax.swing.JMenuItem();
        jMenuItem2 = new javax.swing.JMenuItem();

        getContentPane().setLayout(new java.awt.GridLayout(1, 0));

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Sistema dos Amigos - Menu Principal");
        getContentPane().add(jDesktopPane1);

        jMenu2.setText("Arquivo");
        jMenuItem1.setText("Cidades");
        jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem1ActionPerformed(evt);
            }
        });

        jMenu2.add(jMenuItem1);

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

        jMenu2.add(jMenuItem2);

        jMenuBar2.add(jMenu2);

        setJMenuBar(jMenuBar2);

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

    private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {                                           
// TODO add your handling code here:
        frmCidades cidades = new frmCidades();
        jDesktopPane1.add(cidades);
    }                                          

    private void jMenuItem2ActionPerformed(java.awt.event.ActionEvent evt) {                                           
// TODO add your handling code here:
        System.exit(0);
    }                                          
    
    /**
     * @param args the command line arguments
     */
   /* public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new JanPrinc().setVisible(true);
            }
        });
    }*/
    
    // Variables declaration - do not modify                     
    private javax.swing.JDesktopPane jDesktopPane1;
    private javax.swing.JMenu jMenu2;
    private javax.swing.JMenuBar jMenuBar2;
    private javax.swing.JMenuItem jMenuItem1;
    private javax.swing.JMenuItem jMenuItem2;
    // End of variables declaration                   
    private java.sql.Connection conn;
}
/*
 * frmCidades.java
 *
 * Created on 7 de Setembro de 2007, 09:28
 */

package br.com.amigos.gui;

import br.com.amigos.util.Mascaras;

/**
 *
 * @author  root
 */
public class frmCidades extends javax.swing.JInternalFrame {
    
    /** Creates new form frmCidades */
    public frmCidades() {
        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.
     */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">                          
    private void initComponents() {
        codi_cidade = new javax.swing.JFormattedTextField(mask.getMaskInteiro());
        jPanel1 = new javax.swing.JPanel();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();
        jButton3 = new javax.swing.JButton();
        jButton4 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        nome_cidade = new javax.swing.JFormattedTextField(mask.getMaskNome());
        uf_cidade = new javax.swing.JFormattedTextField(mask.getMaskUF());
        jPanel2 = new javax.swing.JPanel();
        jButton5 = new javax.swing.JButton();
        jButton6 = new javax.swing.JButton();
        jButton8 = new javax.swing.JButton();
        jButton7 = new javax.swing.JButton();

        setClosable(true);
        setIconifiable(true);
        setMaximizable(true);
        setResizable(true);
        setTitle("Cadastro de Cidades");
        setDesktopIcon(null);
        setFrameIcon(null);
        setOpaque(false);
        try {
            setSelected(true);
        } catch (java.beans.PropertyVetoException e1) {
            e1.printStackTrace();
        }
        codi_cidade.setFocusLostBehavior(javax.swing.JFormattedTextField.COMMIT);

        jPanel1.setLayout(new java.awt.GridLayout(1, 4));

        jButton1.setText("|&lt");
        jPanel1.add(jButton1);

        jButton2.setText("&lt");
        jPanel1.add(jButton2);

        jButton3.setText("&gt");
        jPanel1.add(jButton3);

        jButton4.setText("&gt|");
        jPanel1.add(jButton4);

        jLabel1.setText("C\u00f3digo:");

        jLabel2.setText("Nome:");

        jLabel3.setText("UF:");

        nome_cidade.setFocusLostBehavior(javax.swing.JFormattedTextField.COMMIT);

        uf_cidade.setFocusLostBehavior(javax.swing.JFormattedTextField.COMMIT);

        jPanel2.setLayout(new java.awt.GridLayout(1, 4));

        jPanel2.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.LOWERED));
        jButton5.setText("Inserir");
        jPanel2.add(jButton5);

        jButton6.setText("Gravar");
        jPanel2.add(jButton6);

        jButton8.setText("Filtrar");
        jPanel2.add(jButton8);

        jButton7.setText("Excluir");
        jPanel2.add(jButton7);

        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()
                        .addGap(24, 24, 24)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addComponent(jLabel1)
                            .addComponent(jLabel2)
                            .addComponent(jLabel3))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(codi_cidade, javax.swing.GroupLayout.PREFERRED_SIZE, 69, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 226, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addComponent(uf_cidade, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(nome_cidade))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, 373, Short.MAX_VALUE)))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(codi_cidade, javax.swing.GroupLayout.DEFAULT_SIZE, 25, Short.MAX_VALUE)
                        .addComponent(jLabel1))
                    .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(nome_cidade, javax.swing.GroupLayout.PREFERRED_SIZE, 27, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(uf_cidade, javax.swing.GroupLayout.PREFERRED_SIZE, 27, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel3))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, 36, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );
        pack();
    }// </editor-fold>                        
    
    
    // Variables declaration - do not modify                     
    private javax.swing.JFormattedTextField codi_cidade;
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JButton jButton3;
    private javax.swing.JButton jButton4;
    private javax.swing.JButton jButton5;
    private javax.swing.JButton jButton6;
    private javax.swing.JButton jButton7;
    private javax.swing.JButton jButton8;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JFormattedTextField nome_cidade;
    private javax.swing.JFormattedTextField uf_cidade;
    // End of variables declaration                   
    private Mascaras mask = new Mascaras();
}

Compila, roda, mas quanto acesso o menu que deveria abrir a JInternalFrame, nao acontece nada, nem exception, nem nada… será que alguem pode dar uma luz?

A… se eu colocar

cidades.setVisible(true);

acusa erro e NullPointerException.

Obrigado

Douglas

#2

Galera… achei a caca…

era o setDesktopIcon(null);

Obrigado!

Douglas

#3

crie um JFrame e dentro dele instancie o JInternalFrame

Talvez de Certo (use setVisible(true))
vc pode usar este codigo

setUndecorated(true);
getRootPane().setWindowDecorationStyle(JRootPane.FRAME);

dentro do frame para melhorar a aparencia.

Espero que Funcione!!!

#4