如何判断点击了哪个按钮？

Question

为两个按钮添加ActionListener
在actionPerformed(ActionEvent e)中：
  Button btn=(Button)e.getSource();
  if(btn==button1)
    //some code...
  else if(btn==button2)
    //other code...

Answer 1

  JButton confirmButton = new JButton("修  改");
  confirmButton.setActionCommand("confirm");
  confirmButton.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent ae) {
  button_actionPerformed(ae);
  }
  });   JButton cancleButton = new JButton("取  消");
  cancleButton.setActionCommand("cancle");
  cancleButton.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent ae) {
  button_actionPerformed(ae);
  }
  });
   private void button_actionPerformed(ActionEvent ae) {
   if (ae.getActionCommand().equals("confirm"))
   {
   System.out.println("confirm");
   super.dispose();
           ll.setVisible(true);    
   }
   else
   {
   System.out.println("cancle");
   super.dispose();
   ll.setVisible(true);
       }
   }

Answer 2

其实这种例子论坛上挺多的,可以搜索一下,下面是我以前回答的
通过ActionEvent来获得事件源
下面是一个例子
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Frame1 extends JFrame implements ActionListener {
  JButton jButton2 = new JButton();
  JButton jButton3 = new JButton();
  public Frame1() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  public static void main(String[] args) {
    Frame1 frame1 = new Frame1();
    frame1.setSize(800,600);
    frame1.setVisible(true);
  }
  private void jbInit() throws Exception {
    this.getContentPane().setLayout(null);
    jButton2.addActionListener(this);
    jButton2.setText("jButton2");
    jButton2.setBounds(new Rectangle(177, 135, 56, 21));
    jButton3.setText("jButton3");
    jButton3.addActionListener(this);
    jButton3.setBounds(new Rectangle(257, 140, 54, 23));
    this.getContentPane().add(jButton2, null);
    this.getContentPane().add(jButton3, null);
  }  public void actionPerformed(ActionEvent e){
      System.out.println(e.getSource());
      System.out.println(e.getActionCommand());
  }
}

Answer 3

<form>
<input type=button name=button value=button1>
<input type=button name=button value=button2>
</form>if(request.getParameter("button").equals("button1"))
  out.println("Button1 pressed!");
else if(request.getParameter("button").equals("button2"))
  out.println("Button1 pressed!");

Answer 4

不好意思，些错了！
<form>
<input type=submit name=button value=button1>
<input type=submit name=button value=button2>
</form>if(request.getParameter("button").equals("button1"))
  out.println("Button1 pressed!");
else if(request.getParameter("button").equals("button2"))
  out.println("Button2 pressed!");