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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;
   }

   // 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: 26.11.2013