java监听器实例

       
package javaFrame;


import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.FlowLayout;
public class FrameEx2 implements ActionListener{
JFrame jf;
JPanel jp;
JButton button1,button2;
TextArea tf1;
public FrameEx2(){
  jf = new JFrame("小小菜");
  button1 = new JButton("呼呼呼呼呼呼呼呼呼呼呼呼！");
  button2 = new JButton("啦啦啦啦啦啦啦啦啦啦啦啦！");
  Label label1 = new Label("监听听到的");
  tf1 = new TextArea();
  jp = new JPanel();
  jf.setVisible(true);
  button1.addActionListener(new secondbutton());
  button2.addActionListener(new firstbutton());
  jp.add(button1);
  jp.add(button2);


  jf. setLayout(new GridLayout(5,1));
   jf.add(label1);
   jf.add(tf1);
   jf.add(jp);
   jf.setSize(500,300);
}
public static void main(String[] args) {
         FrameEx2 action = new FrameEx2();
}
public void actionPerformed(ActionEvent e) {
  }


class secondbutton implements ActionListener{
         public void actionPerformed(ActionEvent e) {
          tf1.append("这是左边,"+e.getActionCommand()+"\n\n");
  }
}
class firstbutton implements ActionListener{
           
         public void actionPerformed(ActionEvent e) {
          tf1.append("这是右边,"+e.getActionCommand()+"\n\n");
  }
}
}