butteventapp.java

GUI事件处理例子

import java.awt.*;
import java.awt.event.*;
public class ButtEventApp extends Frame implements ActionListener{

	static ButtEventApp frm=new ButtEventApp();
	 public static void main(String args[])
	  {
	  	frm.setTitle("ButtEventApp");
	  	frm.setSize(300,160);
	  	frm.setLayout(null);
	  	Button btn;
	  	btn=new Button("push");
	  	btn.setBounds(120,80,60,30);
	  	btn.addActionListener(frm);
	     frm.add(btn,BorderLayout.CENTER);
	     frm.setVisible(true);
	   }
	   public void actionPerformed (ActionEvent e)
	   {
	   	frm.setBackground(Color.red);
	   	}
}