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我有一个JFrame和5个不同的JPanel和一个NEXT按钮。我想使用NEXT按钮移动到每个JPanel，但它不起作用。当我点击下一次时，它会转到第二个JPanel。但是，它并没有进入第三，第五和第四个JPanel。这里是我的代码：如何使下一个按钮移动到Jframe中的下一个Jpanel
public class MG extends JFrame{
GridBagLayout layout = new GridBagLayout();
Question1 q1;
Question2 q2;
Question3 q3;
public MG() {
initComponents();
setLocationRelativeTo(null);
q1 = new Question1();
q2 = new Question2();
q3 = new Question3();
DynamicPanel.setLayout(layout);
GridBagConstraints c = new GridBagConstraints();
c.gridx =0;
c.gridy =0;
DynamicPanel.add(q1,c);
c.gridx=0;
c.gridy=0;
DynamicPanel.add(q2,c);
c.gridx=0;
c.gridy=0;
DynamicPanel.add(q3,c);
q1.setVisible(true);
q2.setVisible(false);
q3.setVisible(false);
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
btnNext = new javax.swing.JButton();
jButton6 = new javax.swing.JButton();
jLabel3 = new javax.swing.JLabel();
DynamicPanel = new javax.swing.JPanel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setSize(new java.awt.Dimension(1200, 839));
btnNext.setText("Next");
btnNext.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
btnNextMouseClicked(evt);
}
});
jButton6.setBackground(new java.awt.Color(255, 51, 51));
jButton6.setText("Exit");
jButton6.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jButton6MouseClicked(evt);
}
});
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Images/120725oda_top.jpg"))); // NOI18N
DynamicPanel.setBackground(new java.awt.Color(255, 255, 255));
javax.swing.GroupLayout DynamicPanelLayout = new javax.swing.GroupLayout(DynamicPanel);
DynamicPanel.setLayout(DynamicPanelLayout);
DynamicPanelLayout.setHorizontalGroup(
DynamicPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 929, Short.MAX_VALUE)
);
DynamicPanelLayout.setVerticalGroup(
DynamicPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 547, Short.MAX_VALUE)
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(DynamicPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(31, 31, 31)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(btnNext, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jButton6, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(56, 56, 56))
.addGroup(layout.createSequentialGroup()
.addGap(194, 194, 194)
.addComponent(jLabel3)
.addContainerGap(301, Short.MAX_VALUE))
);
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.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(btnNext, javax.swing.GroupLayout.PREFERRED_SIZE, 49, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(39, 39, 39)
.addComponent(jButton6, javax.swing.GroupLayout.PREFERRED_SIZE, 49, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(55, 55, 55))
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 221, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(DynamicPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(0, 28, Short.MAX_VALUE))))
);
setBounds(0, 0, 1218, 867);
}// </editor-fold>
private void btnNextMouseClicked(java.awt.event.MouseEvent evt) {
boolean b = true;
q1.setVisible(false);
q2.setVisible(true);
q3.setVisible(false);
}
private void jButton6MouseClicked(java.awt.event.MouseEvent evt) {
Hi form = new Hi();
MG.this.dispose();
form.setVisible(true);
}
public 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(MainGame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(MainGame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(MainGame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(MainGame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(() -> {
new MG().setVisible(true);
});
}
// Variables declaration - do not modify
public javax.swing.JPanel DynamicPanel;
private javax.swing.JButton btnNext;
private javax.swing.JButton jButton6;
private javax.swing.JLabel jLabel3;
// End of variables declaration
}
看起来你甚至不知道你的代码在做什么，因为这是来自Netbeans/Matisse GUI Builder的生成代码。试着先理解，然后你在这里问SO –
我们多久会问这个问题... [例如]（http://stackoverflow.com/questions/27663306/open-a-jpanel-after-pressing- a-button-in-a-jframe/27663749＃27663749），[example]（http://stackoverflow.com/questions/29571722/java-application-with-multiple-scenes/29639672#29639672），[example]（ http://stackoverflow.com/questions/35470930/is-this-jpanel-code-good-not-showing-the-other-jpanel-when-clicked-on-the-butto/35471323#35471323） – MadProgrammer