showcolorstate.java

来自「java实现pplive」· Java 代码 · 共 75 行

package com.moveShape;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;

import javax.swing.JPanel;

public class ShowColorState extends JPanel implements MyObserver, Runnable
{

	private Color currentColor;
	
	private Point startPoint;
	
	
	public ShowColorState()
	{
		startPoint=new Point(100,380);
		new Thread(this).start();
	}
	
	
	
	public void update(Object ob) 
	{
		currentColor=(Color)ob;
		this.repaint();
		
	}
	
	
	public void paintComponent(Graphics g)
	{
		super.paintComponent(g);
		if(currentColor!=null)
		{
			
			g.setColor(currentColor);
			g.fillRect(startPoint.x, startPoint.y, 200, 100);
		}
		
	}


	public void run()
	{
		// TODO Auto-generated method stub
		while(true)
		{
			if(startPoint.y<10)
			{
				startPoint.y=380;
			}
			startPoint.y-=5;
			this.repaint();
			try
			{
				Thread.sleep(100);
			}
			catch(Exception e)
			{
				
			}
			
		}
	}
	
	
	

	

}