Ola, gostaria que me ajudassem a resolver um problema abaixo:
Exception in thread “AWT-EventQueue-0” java.lang.NullPointerException
at javax.swing.ImageIcon.(ImageIcon.java:217)
at br.com.infox.telas.TelaLogin.initComponents(TelaLogin.java:90)
at br.com.infox.telas.TelaLogin.(TelaLogin.java:46)
at br.com.infox.telas.TelaLogin$2.run(TelaLogin.java:190)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
O erro não permite a execução do Jframe no netbeans, e não sei onde eu errei.
Código do programa:
package br.com.infox.telas;
import java.sql.*;//Chamar biblioteca sql em cada form
import br.com.infox.dal.ModuloConexao; //Chamar modulo conexao em cada form
import javax.swing.JOptionPane;
/**
*
-
@author Alvaro Silva
*/
public class TelaLogin extends javax.swing.JFrame {Connection conexao = null; //Frame
PreparedStatement pst = null; // Frame
ResultSet rs = null; //Framepublic void logar() { String sql = “select * from tblUsuario where login=? and senha = ?”;//Metodo para procurar no banco try { pst = conexao.prepareStatement(sql);// faz a consulta das info no banco pst.setString(1, txtUsuario.getText());//Recebe as info e sao comparadas com as info do campo pst.setString(2, txtSenha.getText());//a mesma coisa de cima rs = pst.executeQuery();//faz a execução da consulta
if (rs.next()) { //caso usuario e senha existir ele mostra a tela principal TelaPrincipal principal = new TelaPrincipal(); principal.setVisible(true); } else { JOptionPane.showMessageDialog(null, "Usuario ou senha incorretos!"); } } catch (Exception e) { JOptionPane.showMessageDialog(null, e);//caso conexao falha }
}
/**
-
Creates new form TelaLogin */ public TelaLogin() { initComponents(); conexao = ModuloConexao.conector(); //Chamar o conector do modulo System.out.println(conexao); // Mostra a conexao para o usuario if (conexao != null) {
Status.setText("conctado");
} else { Status.setText(“Nao conectado”); }
}
/**
-
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”) // private void initComponents() {
jPanel1 = new javax.swing.JPanel(); jLabel1 = new javax.swing.JLabel(); jLabel2 = new javax.swing.JLabel(); txtUsuario = new javax.swing.JTextField(); txtSenha = new javax.swing.JPasswordField(); btnLogin = new javax.swing.JButton(); lblStatus = new javax.swing.JLabel(); Status = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setText(“Usuário”);jLabel2.setText(“Senha”);btnLogin.setText(“Login”); btnLogin.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btnLoginActionPerformed(evt); } });
lblStatus.setIcon(new javax.swing.ImageIcon(getClass().getResource("/br/com/infox/icon/DbOk.png"))); // NOI18NStatus.setIcon(new javax.swing.ImageIcon(getClass().getResource("/br/com/infox/icones/DbOk.png"))); // NOI18Njavax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); jPanel1.setLayout(jPanel1Layout); jPanel1Layout.setHorizontalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addGap(38, 38, 38) .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 72, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(lblStatus) .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(Status)) .addGap(74, 74, 74) .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(txtSenha, javax.swing.GroupLayout.PREFERRED_SIZE, 270, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(txtUsuario, javax.swing.GroupLayout.PREFERRED_SIZE, 270, javax.swing.GroupLayout.PREFERRED_SIZE)) .addComponent(btnLogin, javax.swing.GroupLayout.PREFERRED_SIZE, 87, javax.swing.GroupLayout.PREFERRED_SIZE)) .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) ); jPanel1Layout.setVerticalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addGap(36, 36, 36) .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 24, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(txtUsuario, javax.swing.GroupLayout.PREFERRED_SIZE, 27, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGap(9, 9, 9) .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(txtSenha, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 30, Short.MAX_VALUE) .addComponent(Status)) .addGroup(jPanel1Layout.createSequentialGroup() .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(btnLogin, javax.swing.GroupLayout.PREFERRED_SIZE, 36, javax.swing.GroupLayout.PREFERRED_SIZE))) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(lblStatus) .addContainerGap(119, Short.MAX_VALUE)) );
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jPanel1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(0, 25, Short.MAX_VALUE)) );
jPanel1.getAccessibleContext().setAccessibleName(“X System - Login”);pack();
}//
private void btnLoginActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
logar();//Chama o metodo criado no botao}
/**
-
@param args the command line arguments
/
public static void main(String args[]) {
/ Set the Nimbus look and feel /
//
/ 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(TelaLogin.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(TelaLogin.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(TelaLogin.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(TelaLogin.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//
/* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new TelaLogin().setVisible(true); } }); }
- For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
// Variables declaration - do not modify private javax.swing.JLabel Status; private javax.swing.JButton btnLogin; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel2; private javax.swing.JPanel jPanel1; private javax.swing.JLabel lblStatus; private javax.swing.JPasswordField txtSenha; private javax.swing.JTextField txtUsuario; // End of variables declaration }
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