wall.java

一些JAVA的小程序

import java.awt.*;
public class Wall implements PinBallTarget
{
	public Rectangle location;

	public Wall (int x, int y, int width, int height)
	{
		location = new Rectangle(x, y, width, height);
	}

	public void moveTo (int x, int y)
	{
		location.setLocation(x, y);
	}

	public void paint (Graphics g)
	{
		g.setColor(Color.black);
		g.fillRect(location.x, location.y, location.width, location.height);
	}

	public boolean intersects (PinBall aBall)
	{       
		return location.intersects(aBall.box());

	}

	public void hitBy (PinBall aBall)
	{
		if ((aBall.y() < location.y) ||
		    (aBall.y() > (location.y + location.height)))
		  aBall.reflectHorz();
		else
		  aBall.reflectVert();
	}
}