//A class based representation of a ball
public class Ball {
    //3 instance variables, the first, diameter,
    //stores the diameter of the ball in whatever
    //units you want.
    //The second, a String representation of the color
    //of the ball.
    //The third, an integer that stores the number
    //of times the ball has been bounced. 
    private double diameter;
    private String color;
    private int timesBounced;

    //Constructor to create balls with, specifying 
    //the diameter and color of the ball. 
    //Note that timesBounced is set to 0, 
    //this constructor assumes that this is a fresh
    //ball that has never been bounced.
    public Ball(double newDiameter, String newColor) {
        diameter = newDiameter;
        color = newColor;
        timesBounced = 0;
    }

    //Returns the current diameter of the ball
    public double getDiameter() {
        return diameter;
    }

    //Returns the current color of the ball
    public String getColor() {
        return color;
    }

    //Returns the number of times this ball has
    //been bounced
    public int getTimesBounced() {
        return timesBounced;
    }

    //Bounces the ball, all this does is add
    //one to the timesBounced instance variable
    public void bounceBall() {
        timesBounced++;
    }

    //A normal toString method, that provides the 
    //instance information about the Ball that we
    //are currently working with as a String
    public String toString() {
        return "This ball is " + color + " with a diameter of " +
            diameter + " and has been bounced " + timesBounced + 
            " times!";
    }
}