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boxbounce3 no really!

By: ace on Mar 3rd, 2010  |  syntax: None  |  size: 4.59 KB  |  hits: 9  |  expires: Never
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  1. import java.awt.*;
  2. import java.awt.geom.*;
  3. import java.lang.Number;
  4. import java.util.ArrayList;
  5. import java.util.Iterator;
  6. import java.util.Random;
  7.  
  8. /**
  9.  * Class BallDemo - provides two short demonstrations showing how to use the
  10.  * Canvas class.
  11.  *
  12.  * @author Michael Kolling and David J. Barnes
  13.  * @version 2006.03.30
  14.  */
  15.  
  16. public class BoxBounce  
  17. {
  18.     private Canvas myCanvas;
  19.     private ArrayList <BouncingBall> ballResevoir;
  20.     private Random resevoirCapacity;
  21.     private Random randomXPos;
  22.     private Random randomYPos;
  23.     private Random randomBallSize;
  24.     private int width;
  25.     private int height;
  26.     private int boxWidth;
  27.     private int boxHeight;
  28.  
  29.     /**
  30.      * Create a BallDemo object. Creates a fresh canvas and makes it visible.
  31.      */
  32.     public BoxBounce(int width, int height)
  33.     {
  34.         myCanvas = new Canvas("Box Bounce", width, height);
  35.         myCanvas.setVisible(true);
  36.         this.width = width;
  37.        this.height = height;
  38.        
  39.     }
  40.  
  41.     /**
  42.      * Demonstrate some of the drawing operations that are
  43.      * available on a Canvas object.
  44.      */
  45.     public void drawDemo()
  46.     {
  47.         myCanvas.setFont(new Font("helvetica", Font.BOLD, 14));
  48.         myCanvas.setForegroundColor(Color.red);
  49.  
  50.         myCanvas.drawString("We can draw text, ...", 20, 30);
  51.         myCanvas.wait(1000);
  52.  
  53.         myCanvas.setForegroundColor(Color.black);
  54.         myCanvas.drawString("...draw lines...", 60, 60);
  55.         myCanvas.wait(500);
  56.         myCanvas.setForegroundColor(Color.gray);
  57.         myCanvas.drawLine(200, 20, 300, 50);
  58.         myCanvas.wait(500);
  59.         myCanvas.setForegroundColor(Color.blue);
  60.         myCanvas.drawLine(220, 100, 370, 40);
  61.         myCanvas.wait(500);
  62.         myCanvas.setForegroundColor(Color.green);
  63.         myCanvas.drawLine(290, 10, 320, 120);
  64.         myCanvas.wait(1000);
  65.  
  66.         myCanvas.setForegroundColor(Color.gray);
  67.         myCanvas.drawString("...and shapes!", 110, 90);
  68.  
  69.         myCanvas.setForegroundColor(Color.red);
  70.  
  71.         // the shape to draw and move
  72.         int xPos = 10;
  73.         Rectangle rect = new Rectangle(xPos, 150, 30, 20);
  74.  
  75.         // move the rectangle across the screen
  76.         for(int i = 0; i < 200; i ++) {
  77.             myCanvas.fill(rect);
  78.             myCanvas.wait(10);
  79.             myCanvas.erase(rect);
  80.             xPos++;
  81.             rect.setLocation(xPos, 150);
  82.         }
  83.         // at the end of the move, draw once more so that it remains visible
  84.         myCanvas.fill(rect);
  85.     }
  86.    
  87.     public void drawBox()
  88.  
  89.     {
  90.        int cHeight = new Double(myCanvas.getHeight()).intValue();
  91.        int cWidth =  new Double(myCanvas.getWidth()).intValue();
  92.        int boxHeight = (cHeight - cHeight/2);
  93.        int boxWidth = (cWidth -cWidth/2);
  94.        Rectangle frame = new Rectangle(20, 20, boxWidth, boxHeight);
  95.          myCanvas.fill(frame);
  96.         myCanvas.wait(200);
  97.          myCanvas.eraseRectangle (40, 40, boxWidth-40, boxHeight-40);
  98.          this.boxWidth = boxWidth;
  99.          this.boxHeight = boxHeight;
  100.         }
  101.          
  102.    
  103.        
  104.     /* Simulate two bouncing balls
  105.      */
  106.    
  107.    public int setballXPos()
  108.    {
  109.        int ballXPos = randomXPos.nextInt(boxWidth-20);
  110.        if (ballXPos > 40 & ballXPos < boxWidth - 40)
  111.         {    
  112.        System.out.println("ball xpos " + ballXPos);
  113.        return ballXPos;
  114.     }
  115.    
  116.     else
  117.     {
  118.         setballXPos();
  119.     }
  120.     return ballXPos;
  121. }
  122.    
  123.     public int setballYPos ()
  124.     {
  125.         int ballYPos = randomYPos.nextInt(boxHeight-20);
  126.         System.out.println("ball ypos " + ballYPos);
  127.         return ballYPos;
  128.     }
  129.    
  130.     public void bounce()
  131.     {
  132.         int ground = 400;   // position of the ground line
  133.        
  134.         myCanvas.setVisible(true);
  135.  
  136.         // draw the ground
  137.         myCanvas.drawLine(50, ground, 550, ground);
  138.  
  139.         BouncingBall ball = new BouncingBall(setballXPos(), setballYPos(), 16, Color.blue, ground, myCanvas);
  140.         ball.draw();
  141.         BouncingBall ball2 = new BouncingBall(70, 80, 20, Color.red, ground, myCanvas);
  142.         ball2.draw();
  143.        
  144.        
  145.         // make them bounce
  146.     boolean finished =  false;
  147.         while(!finished) {
  148.             myCanvas.wait(50);           // small delay
  149.             ball.move();
  150.             ball2.move();
  151.             // stop once ball has travelled a certain distance on x axis
  152.             if(ball.getXPosition() >= 550 && ball2.getXPosition() >= 550) {
  153.                 finished = true;
  154.             }
  155.         }
  156.         ball.erase();
  157.         ball2.erase();
  158.        
  159.        
  160.    
  161.  
  162.     }
  163.    
  164. }
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