Ball.java

import java.awt.*;

import java.util.*;



public class Ball extends Rectangle{

    Random random;
    int xVelocity;
    int yVelocity;
    int initialSpeed = 4 ;

    Ball(int x, int y, int width, int height){
        super(x, y, width, height);
        random = new Random();
        int randomXDirection = random.nextInt(2);

        if(randomXDirection==0)
            randomXDirection--;
        setXDirection(randomXDirection*initialSpeed);

        int randomYDirection = random.nextInt(2);

        if(randomYDirection==0)
            randomYDirection--;
        setXDirection(randomYDirection*initialSpeed);
    }

    public void setXDirection(int randomXDirection){
        xVelocity = randomXDirection;

    }
    public void setYDirection(int randomYDirection){
        yVelocity=randomYDirection;
    }
    public void move(){
        x+=xVelocity;
        y+=yVelocity;
    }
    public void draw(Graphics g){
        g.setColor(Color.white);
        g.fillOval(x, y, height, width);
    }
}