Ich habe 2 JPanels und 1 JFrame und ich versuche, zwischen Panels zu wechseln, wenn ich auf eine Schaltfläche klicke. Ich möchte CardLayout nicht verwenden, da ich verschiedene Panels möchte und mit CardLayouts kann ich für beide nur die gleiche Schaltfläche haben . Mein Code ist:

package javaapplication2;

import javax.swing.JPanel;

public class NewJFrame extends javax.swing.JFrame {
/**
 * Creates new form NewJFrame
 */JPanel panel1 = new JPanel();
 JPanel panel2 = new JPanel();
public NewJFrame() {
    initComponents();
}

private void initComponents() {

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    setBackground(new java.awt.Color(121, 183, 60));
    setSize(200, 300);
    setResizable(false);



    /**panel1**/
     jButton1 = new javax.swing.JButton();

    jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
        public void mouseClicked(java.awt.event.MouseEvent evt) {
            jButton1MouseClicked(evt);
        }
    });
    jButton1.setText("jButton1");
     panel1.setBackground(new java.awt.Color(121, 183, 60));
    panel1.setMaximumSize(new java.awt.Dimension(100, 200));
    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(panel1);
    panel1.setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGap(164, 164, 164)
            .addComponent(jButton1)
            .addContainerGap(172, Short.MAX_VALUE))
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGap(115, 115, 115)
            .addComponent(jButton1)
            .addContainerGap(158, Short.MAX_VALUE))
    );

    /**panel2**/

       jButton2 = new javax.swing.JButton();

    jButton2.addMouseListener(new java.awt.event.MouseAdapter() {
        public void mouseClicked(java.awt.event.MouseEvent evt) {
            jButton2MouseClicked(evt);
        }
    });
    jButton2.setText("jButton2");
     panel2.setBackground(new java.awt.Color(101, 13, 61));
    panel2.setMaximumSize(new java.awt.Dimension(100, 200));
    javax.swing.GroupLayout layout2 = new javax.swing.GroupLayout(panel2);
    panel2.setLayout(layout2);
    layout2.setHorizontalGroup(
        layout2.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout2.createSequentialGroup()
            .addGap(164, 164, 164)
            .addComponent(jButton2)
            .addContainerGap(172, Short.MAX_VALUE))
    );
    layout2.setVerticalGroup(
        layout2.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout2.createSequentialGroup()
            .addGap(115, 115, 115)
            .addComponent(jButton2)
            .addContainerGap(158, Short.MAX_VALUE))
    );
   add(panel2);
    pack();
}


public void changePanel(){
    getContentPane().removeAll();
    add(panel1);
    invalidate();
    repaint();
}

private void jButton1MouseClicked(java.awt.event.MouseEvent evt) {
    changePanel();
}
 private void jButton2MouseClicked(java.awt.event.MouseEvent evt) {
    changePanel();
}

private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;

}