在 运行 之前或游戏循环中不显示 Swing 组件

Not showing Swing component when running before or in the game loop

我实际上是在尝试修复 JFrame 组件的一个问题,当我 运行 我的游戏循环时,该组件不想显示(请参阅代码后的问题)。我已尽可能减少代码,以便您快速理解我的意思:

Run.class

public static void main(String[] args) {
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            Game game = new Game();
            game.loop();
        }
    });
}

Game.class

private Frame frame;
private HashMap<String,ActionListener> actions;
private HashMap<String,Image> ressources;

public Game() {
    this.setActions();
    this.setRessources();
    frame = new Frame(actions,ressources);
}
public void loop() {
    double FPS = 60;
    double UPS = 60;
    long initialTime = System.nanoTime();
    final double timeU = 1000000000 / UPS;
    final double timeF = 1000000000 / FPS;
    double deltaU = 0, deltaF = 0;
    int frames = 0, ticks = 0;
    long timer = System.currentTimeMillis();
    boolean running = true;
    boolean RENDER_TIME = false;

    while (running) {
        ...code for update, render, with a fps control
    }
}

Frame.class

public Frame(HashMap<String,ActionListener> actions, HashMap<String,Image> ressources) {

    this.setTitle(Constants.GAME_NAME);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    this.setSize(Constants.GAME_SIZE_X, Constants.GAME_SIZE_Y);
    this.setLayout(new FlowLayout());

    JButton myButton = new JButton("My Button");
    this.add(myButton);

    this.revalidate();
    this.repaint();
    this.setVisible(true);
}

这不是完整的代码,因为我不想给出一个没用的东西。所以在这里,我的问题是:

如果我 运行 此代码,按钮将不会显示在框架中。但是,如果我在 Run.class 中注释 game.loop(),则 windows 显示按钮。我不明白为什么?

我已经尝试了几天才弄明白。我需要一些帮助。一个人怕是查不出来

想要阻止可以为您处理 "looping" 的 Event Dispatching Thread by running a long process you can use swing Timer

ActionListener animate = e -> {
    game.oneFrame();
    panel.repaint();  
};
timer = new Timer(50, animate); 
timer.start(); 

public void oneFrame(){
   //update what is needed for one "frame"
}

需要更多帮助post mcve.