1.這裡介紹繼承implements ActionListener方法：

  設定按鈕動作監聽注意兩部分即可：①按鈕.addActionListener②public void actionPerformed(ActionEvent arg0){方法體}；

舉個例子：

import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.WindowConstants;

public class Testone extends JFrame implements ActionListener{
	private JButton a=new JButton("按鈕");
	public Testone(){
		setTitle("測試動作監聽");
		setVisible(true);
		setSize(300,300);
		Container b=getContentPane();
		b.add(a);
		a.addActionListener(this);
		setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
	}
	public void actionPerformed(ActionEvent arg0){
		a.setText("我被單擊了");
	}
	public static void main(String[] args){
		new Testone();
	}
}
 

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