Iv e 研究了本书的答复。 我知道,试图阅读这本书的其他人也感到同样。 它称为“Evil Genius电影运动会”。 是否有任何人读过这本书? I m on Project 10:Radical Say-The Cars. 所有材料都正确汇编,但出于某种原因,我的汽车没有在JFrame的正确地点展示。 他们应在两条白色线下展示。 我对《法典》持肯定态度,但该书是错误的。 我已经尝试改变起源地的健康权部分,但不管我做什么都不算。 我可以附上一个形象,因为我没有至少10个东西。 这是有关汽车安置的法典。

public class TheCars extends JFrame
{
final int WIDTH = 900; int HEIGHT = 650;

double p1Speed = .5, p2Speed = .5;


Rectangle p1 = new Rectangle(WIDTH/9,HEIGHT/2, WIDTH/30,WIDTH/30);


Rectangle p2 = new Rectangle(((WIDTH/9)+((int)((WIDTH/9)*1.5)/2)),(HEIGHT/2)+    
(HEIGHT/10),WIDTH/30,WIDTH/30);
//the constructor
public TheCars()
{
    //the following code creates the JFrame
    super("Radical Racing");
    setSize(WIDTH,HEIGHT);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setVisible(true);

    //start the inner class (which works on it s own because it is a thread)
    Move1 m1 = new Move1();
    Move2 m2 = new Move2();
    m1.start();
    m2.start();

  }
  //this will draw the cars and the racetrack
  public void paint(Graphics g)
 {
     super.paint(g);

  //set the color to blue for p1
    g.setColor(Color.BLUE);
    //now draw the actual player
    g.fill3DRect(p1.x,p1.width,p1.width,p1.height,true);

    //set the color to red for p2
    g.setColor(Color.red);
    //now draw the actual player
      g.fill3DRect(p2.x,p2.width,p2.width,p2.height,true);

}
private class Move1 extends Thread
{
    public void run()
            //This should all be in an infinite loop so that the process repeats.
    {
        while(true)
        {
        //now put in the try block. This will let 
        //the program exit if there is an error
        try
        {
            //first refresh the screen
            repaint();
            //increase speed a bit
            if(p1Speed<=5)
                p1Speed+=.2;
            p1.y-=p1Speed;

            //this delays the refresh rate
            Thread.sleep(75);
        }
        catch(Exception e)
        {
            //if there is an exception (an error), exit the loop
            break;

        }

        }
    }
}

private class Move2 extends Thread
{
    public void run()
    {
    //this should all be in an infinite loop so the process repeats
    while(true)
    {
    //now put the code in a "try" block.
        //this will let the program exit if there is an error
        try
        {
            //first refresh the screen
            repaint();
            //increase the speed a bit
                    if(p2Speed<=5)
                        p2Speed+=.2;
                    p2.y-=p2Speed;

                    //this delays the refresh rate
                    Thread.sleep(75);
        }
        catch(Exception e)
        {
            //if there is an exception (an error), exitthe loop
            break;
        }
    }
    }

 }
public static void main(String[]args)
{
    new TheCars();
}

}