为什么这不能创建缓冲策略？

Question

我收到一个Exception in thread "Thread-3" java.lang.InternalError: Could not create a buffer strategy错误，该错误可以追溯到 Java 的基本代码，它可以追溯到下面第 58 ( render();) 和 77 ( this.createBufferStrategy(5);) 行的 Game 类。

任何帮助都会很棒，如果您需要查看其他类，我还将我的所有代码上传到 github (mitisme/mit)。

import java.awt.Canvas;

import java.awt.Color;

import java.awt.*;

import java.awt.image.BufferStrategy;

public class Game extends Canvas implements Runnable {

   private static final long serialVersionUID = 1L;

   private boolean isRunning = false;

   private Thread thread;

   private Handler handler;

   //Creates background window size and holds objects by handler

   public Game() {

      Screen myScreen = new Screen(1280, 720, "Deed", this);

      start();

      handler = new Handler();

      addKeyListener(new KeyInput(handler));

      handler.addObject(new Player(425, 745, ID.Player, handler));

   }

//starts a new thread

   private void start() {

      isRunning = true;

      thread = new Thread(this);

      thread.start();

   }

   // Stops current thread, and catches exceptions

   private void stop() {

      isRunning = false;

      try {

         thread.join();

      } catch (InterruptedException e) {

         e.printStackTrace();

      }

   }

   //Infinite game loop

   public void run() {

      this.requestFocus();

      long lastTime = System.nanoTime();

      double amountOfTicks = 60.0;

      double ns = 1000000000 / amountOfTicks;

      double delta = 0;

      long timer = System.currentTimeMillis();

      int frames = 0;

      while(isRunning) {

         long now = System.nanoTime();

         delta += (now - lastTime) / ns;

         lastTime = now;

         while(delta >= 1) {

            tick();

            delta--;

         }

         render();

         frames++;

         if(System.currentTimeMillis() - timer > 1000) {

            timer += 1000;

            frames = 0;

         }

      }

      stop();

   }

Answer 1

我发现，这条线this.createBufferStrategy(5);只能从2-4创建缓冲策略，否则会出错。