trafficlightpanel.java

红绿灯,实现灯的转换同文字显示!

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

public class trafficlightPanel extends JPanel 
{
	private drawPanel light;
    private JButton colorChanger;
	
	public trafficlightPanel() 
	{
		
		setBackground(Color.white);
		setPreferredSize(new Dimension(500, 220));

		light = new drawPanel();
		colorChanger = new JButton("Change Color");

		ButttonListener listener = new ButttonListener();
		colorChanger.addActionListener(listener);
		
		add(light);					   
		add(colorChanger);
	}

	private class ButttonListener implements ActionListener 
	{

		public void actionPerformed(ActionEvent event)
	   {
			light.ChangeColor();
			light.repaint();
	   }
	}
}