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Objektorientierte Programmierung WS 2013/2014 - Datei Ball.java

//
// general purpose reusable bounding ball abstraction
//
// From Chapter 5 of
// Understanging Object-Oriented Programming with Java
// Written by Tim Budd
// Published by Addison-Wesley Longman
//
// See ftp://ftp.cs.orst.edu/pub/budd/java/ReadMe.html 
// for further information
//
import java.awt.*;


public class Ball {
    protected Rectangle location;
    protected double    dx;
    protected double    dy;
    protected Color     color;

    public Ball(int x, int y, int r) {
        location = new Rectangle(x - r, y - r, 2 * r, 2 * r);
        dx = 0;
        dy = 0;
        color = Color.blue;
    }

    // functions that set attributes
    public void setColor(Color newColor) {
        color = newColor;
    }

    public void setMotion(double ndx, double ndy) {
        dx = ndx;
        dy = ndy;
    }

    // functions that access attributes of ball
    public int radius() {
        return location.width / 2;
    }

    public int x() {
        return location.x + radius();
    }

    public int y() {
        return location.y + radius();
    }

    public double xMotion() {
        return dx;
    }

    public double yMotion() {
        return dy;
    }

    public Rectangle region() {
        return location;
    }

    // functions that change attributes of ball
    public void moveTo(int x, int y) {
        location.setLocation(x, y);
    }

    public void move() {
        location.translate((int) dx, (int) dy);
    }

    public void paint(Graphics g) {
        g.setColor(color);
        g.fillOval(location.x, location.y, location.width, location.height);
    }
}

Generiert mit Camelot | Probleme mit Camelot? | Geändert am: 06.01.2014