這個小插圖可能是你想要的。它有一個帶有按鈕的表單。單擊后，面板上的文本字段會更改。
public class NewJFrame extends javax.swing.JFrame {
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
public NewJFrame() {
initComponents();
}
private void initComponents() {
jButton1 = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
jButton1.setText("Click me");
jLabel1.setText("Not yet clicked");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jLabel1.setText("clicked");
}
});
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(146, 146, 146)
.addComponent(jButton1))
.addGroup(layout.createSequentialGroup()
.addGap(172, 172, 172)
.addComponent(jLabel1)))
.addContainerGap(160, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(80, 80, 80)
.addComponent(jButton1)
.addGap(78, 78, 78)
.addComponent(jLabel1)
.addContainerGap(102, Short.MAX_VALUE))
);
pack();
}
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
}
});
}
