为什么 FPS 不打印在我的 window 中？

Question

我相信一旦我启动这个程序，FPS 就会打印在我的新 window 中的某个地方。我看到 window 但 FPS 没有显示在其中。怎么了？

public class Game extends Canvas implements Runnable {
  private static final long serialVersionUID = 1L;

  public static final int WIDTH = 640, HEIGHT = WIDTH / 12 * 9;
  private Thread thread;
  private boolean running = false;

  public Game() {
    new Window(WIDTH, HEIGHT, "MY GAME", this);
  }

  public synchronized void start() {
    thread = new Thread(this);
    thread.start();
    running = true;
  }

  public synchronized void stop() {
    try {
      thread.join();
      running = false;
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public void run() {
    long lastTime = System.nanoTime();
    double amountOfTicks = 60.0;
    double ns = 1000000000 / amountOfTicks;
    double delta = 0;
    long timer = System.currentTimeMillis();
    int frames = 0;
    while (running) {
      long now = System.nanoTime();
      delta += (now - lastTime) / ns;
      lastTime = now;
      while (delta <= 1) {
        delta--;
      }
      if (running)
        frames++;

      if (System.currentTimeMillis() - timer > 1000) {
        timer += 1000;
        System.out.println("fps: " + frames);
        frames = 0;
      }
    }
    stop();
  }

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

Answer 1

该教程可能意味着 fps 将打印到某个控制台 window，该控制台也在作者的开发环境中打开。 System.out.println 仍将打印为标准输出，除非您将其更改为 setOut 并编写一些额外的代码，然后在 Window.[=14 的某处的 GUI 组件中放置或绘制文本=]

为什么 FPS 不打印在我的 window 中？

Why doesn't the FPS print in my window?

java

printing

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window