draw.java

java网络编程

package draw;

import java.awt.*;

class MyCanvas extends Canvas{
	int x,y;
	
	MyCanvas(){
		setSize(300,300);
	}
	
	public void set(int x,int y){
		this.x=x;
		this.y=y;
	}
	public void paint(Graphics g){
		if(x!=0&y!=0){
			g.setColor(Color.red);
			g.fillOval(x,y,10,10);
		}
	}
}