testevent1.java

来自「Java语言」· Java 代码 · 共 39 行

import java.awt.*;
import java.awt.event.*;
public class TestEvent1{
	public static void main(String args[]){
		final MyFrame f= new MyFrame("this is a test frame");
		f.setSize(200,200);
		f.setVisible(true);	
		f.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e){
				f.dispose();
				System.exit(0);	
			}
		});	
	}
}
class MyFrame extends Frame implements ActionListener{
	public MyFrame(String s){
		super(s);
		Button b1=new Button("测试");
		Button b2=new Button("退出");
		//将事件源（两个按钮）注册给事件处理对象
		b1.addActionListener(this);
		b2.addActionListener(this);
		setLayout(new FlowLayout());
		//将按钮加入Frame
		add(b1);
		add(b2);
	}
	public void actionPerformed(ActionEvent e){
	//如果事件源是b1,显示信息
		if(e.getActionCommand()=="测试"){
			System.out.println("按下按钮");
		}
		else
		{
			System.exit(0);
		}
	}	
}