Question

所以我需要模拟一个十字路口。我现在有一个涂在JPanel上的十字路口和两个模拟汽车的汽车线。当一辆汽车靠近十字路口时，它应该停下来，稍等片刻，如果道路畅通，它应该穿过十字路口。所以每个线程都有一个move（）方法，执行时间为40ms。 JPanel类：

public class Map extends JPanel {


private final Image mapa;
private Timer timer;
private Car s,s1;
public Map(){
    s = new Car(1,1,0,550,265);
    s1 = new Car(1,3,0,5,315);
    ExecutorService es = Executors.newCachedThreadPool();
    es.execute(s);
    es.execute(s1);


    ImageIcon temp = new          ImageIcon(this.getClass().getClassLoader().getResource("resources/plansza.png"));
    mapa = temp.getImage();

    setPreferredSize(new Dimension(800,600));
    timer = new Timer(40, new TL());
    timer.start();

    //auto.start();
    //auto1.start();
}


@Override
public void paintComponent(Graphics g){
    g.drawImage(mapa, 0, 0, this);

    g.drawImage(s.getImage(), s.getX(), s.getY(), this);
    g.drawImage(s1.getImage(), s1.getX(), s1.getY(), this);
    System.out.println("40ms passed");


}

private class TL implements ActionListener {
    @Override
    public void actionPerformed(ActionEvent e) {
        repaint();

    }
}

}

和Car类：

public class Car extends Thread{

Timer timer;
private int x , y;
private int predkosc, skad, gdzie;
private Image sam;

public Car(int predkosc, int skad, int gdzie, int x, int y)
{   
    //wspPocz();

    this.predkosc = predkosc;
    this.skad = skad;
    this.gdzie = gdzie;   
    this.x = x;
    this.y = y;

    ImageIcon auto = new ImageIcon(this.getClass().getClassLoader().getResource("resources/sam.png"));
    sam = auto.getImage();
}

//wtf ?!



@Override
public void run() {
    timer = new Timer(40, new Przemieszczenie());
    timer.start();
}
public int getX(){
    return x;
}
public int getY(){
    return y;
}
int dx=0;
private void move(){

    if(skad == 3){
        x = x + 1;
        dx++;
    }
    else if(skad == 1)
    {
        x -= 1;
    }


    if(dx > 196){
        try {
            Thread.sleep(1000);
            dx = 0;
        } catch (InterruptedException ex) {
            System.out.println("gowno");
        }
    }
}


public Image getImage(){
    return sam;
}
private class Przemieszczenie implements ActionListener {

    @Override
    public void actionPerformed(ActionEvent e) {
        move();
    }
}

}

好的，所以我只检查向东行驶的汽车。向西的那个应该开车穿过而不要停下来。但是当一个从西向东行进的人达到196个像素时Thread.sleep(1000);导致整个应用程序停止响应一秒钟。第二辆车也停了下来，甚至主线也正在睡觉。怎么了？ move（）方法在由Car扩展的Car类中。

Thread.sleep使所有活动线程都处于休眠状态

0 个答案: