Question

我在Java课上练习时遇到了一些问题，我在游戏中制作了两个矩形，我需要将这些数字从一侧移到另一侧。我已经拥有了运动类，并制作了机芯线程的实例，但它似乎并没有移动。

这是我的代码：实体类

class Entity implements Drawable{
Point pos;
Rectangle body;
boolean rigid;

public Entity(){
    pos = new Point(0,0);
    body = new Rectangle(pos, new Dimension(0,0));
}

public Entity(Point p, Dimension d){
    pos = new Point(p);
    body = new Rectangle(pos, d);
}

public Entity(int x, int y, int width, int height){
    pos = new Point(x,y);
    body = new Rectangle(pos, new Dimension(width, height));
}

public BufferedImage getActualImage(){
    Dimension d = body.getSize();
    return new BufferedImage(d.width, d.height, BufferedImage.TYPE_3BYTE_BGR);
}
}

这个类是游戏环境，我在窗口添加对象。

class Field extends JPanel{
Player p1;
int i=0;
static ArrayList<Entity> objects  = new ArrayList<Entity>();


private ActionListener actionListener = new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent e) {
        revalidate();
        repaint();
    }
};

public Field(){

    //Implementar patron de disen/o
    p1 = setupPlayer();
    Game.objects.add(p1);

    //Player p2 = new Player();
    //p2.setImageRightRun("hero\\run.png");
    //Game.objects.add(p2);

    Entity e1 = new Entity(0, 520, 600, 50);
    Blocks block1 = new Blocks(260, 370, 100, 20);
    Blocks block2 = new Blocks(190, 440, 100, 20);
    Goal block3 = new Goal(300, 270, 50,50);
    Game.objects.add(e1);
    Game.objects.add(block1);
    Game.objects.add(block2);
    Game.objects.add(block3);
    new Thread(new MovementBlock(block1)).start(); //movement thread//
    PlayerBehaviour pb = new PlayerBehaviour(p1);
    this.addKeyListener(pb);
    Timer tick = new Timer(20, actionListener);
    tick.setInitialDelay(0);
    tick.start();
}

块类

    class Blocks extends Entity{
    public Blocks(int x, int y, int ancho, int largo){
        super(x,y,ancho,largo);
    }
}

和运动的线程

    class MovementBlock implements Runnable{
    Blocks block;
    int velX = 2;
    public MovementBlock(Blocks block){
        this.block = block;
    }

    public void run(){
        if(block.pos.x < 0 || block.pos.x > 500){
            velX = -velX;
        }
        block.pos.x = block.pos.x + 1;
        repaint();
    }  
}

这是我对街区和运动的代码，是不是我没有考虑这个运动？

感谢阅读。

Answer 1

如果移动是连续动作，则run方法需要是循环。你写它的方式，它只运行一次。将其添加到MovementBlock。

boolean running = true;
int frameDelay = 20; // ms

public void stop() { running = false; }

public void run() {
    while (running) {
        try {
            if (block.pos.x < 0 || block.pos.x > 500) {
                velX = -velX;
            }
            block.pos.x += velX;
            repaint();
            Thread.sleep(frameDelay);
        } catch (InterruptedException e) {}
    }
}

使用线程移动矩形图时遇到问题

1 个答案: