showcolornamestate.java

来自「java实现pplive」· Java 代码 · 共 39 行

package com.moveShape;

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

import javax.swing.JPanel;
import javax.swing.border.LineBorder;

public class ShowColorNameState extends JPanel implements MyObserver {

	private  Color currentColor;
	
	public ShowColorNameState()
	{
		this.setBorder(new LineBorder(Color.red));
	}
	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.drawOval(100, 100, 200, 100);
		}
		
	}

}