borderrectangle.java

java编的模拟一个小球的非弹性碰撞

import java.awt.*;

public class BorderRectangle extends Rectangle
{
   int x,y,width,height;
   Color color;
  
   public BorderRectangle(int x,int y,int width,int height)
   {
	   super();
	   this.x=x;
	   this.y=y;
	   this.width=width;
	   this.height=height;
	   color=new Color(255,255,255);
   }
   
   public void setBKColor(Color color)
   {
	   this.color=color;
   }
   
   public void draw(Graphics g)
   {
	   Color colorOld=g.getColor();
	   g.setColor(color);
	   g.fillRect(x+2,y+2,width-2,height-2);
	   
	   g.setColor(new Color(128,128,128));
	   g.drawLine(x,y,x+width,y);
	   g.drawLine(x,y,x,y+height);
	   g.setColor(Color.black);
	   g.drawLine(x+1,y+1,x+width-2,y+1);
	   g.drawLine(x+1,y+2,x+1,y+height-1);
	   
	   g.setColor(new Color(180,180,180));
	   g.drawLine(x+width-1,y+1,x+width-1,y+height-1);
	   g.drawLine(x+width-1,y+height-1,x+2,y+height-1);
	   g.setColor(Color.white);
	   g.drawLine(x+width,y,x+width,y+height-1);
	   g.drawLine(x+width,y+height,x+1,y+height);
       g.setColor(colorOld);
   }
}