事件处理

package screen;

import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

public  class textFrame implements ActionListener {
		JFrame f;
		JPanel p;
		JLabel l;
		JButton b1;
		JButton b2;
	public textFrame(){
		f = new JFrame("text");
		p = new JPanel(new GridLayout(1,2,5,5));
		l = new JLabel("测试");
		b1 = new JButton("变色");
		f.add(p);
		p.add(l);
		p.add(b1);
		f.setSize(400, 300);
		f.setVisible(true);
		b1.addActionListener(this);
	}
	
	public static void main(String[] args) {
		new textFrame();
		
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		p.setBackground(new Color((int)(Math.random()*255),(int)(Math.random()*255),(int)(Math.random()*255)));
		l.setLocation((int)(Math.random()*110),(int)(Math.random()*110));
	}

}