Question

我得到了；

Exception in thread "main" java.lang.Error: Unresolved compilation problem: 
    The method Screen(int, int, String, Game) is undefined for the type Game

    at Game.<init>(Game.java:15)
    at Game.main(Game.java:94)

我将程序从JGrasp切换到Eclipse。复制并粘贴所有代码和类后，在尝试运行该程序时遇到上述错误。在JGrasp中，此代码运行良好，但是由于某些原因Eclipse不喜欢它。

这是游戏类的完整代码，希望这将有助于显示异常发生的原因。我拥有的其他类包括ID，Handler，GameObject，KeyInput和Player。每个都与他们的名字有关。希望这会有所帮助

import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
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(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();
            //updates++;
            delta--;
         }
         render();
         frames++;

         if(System.currentTimeMillis() - timer > 1000) {
            timer += 1000;
            frames = 0;
            //updates = 0;
         }
      }
      stop();
   }

   public void tick() {
      handler.tick();
   }
   //Holds extra frames before showing (3 extra)
   public void render() {
      BufferStrategy bs = this.getBufferStrategy();
      if(bs == null) {
         this.createBufferStrategy(5);
         return;
      }

      Graphics g = bs.getDrawGraphics();
      /////////////////Renders background first, then handlers///////////////////

      g.setColor(Color.black);
      g.fillRect(0,0,1280,720);

      handler.render(g);

      /////////////////Updates graphics////////////////////
      g.dispose();
      bs.show();

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

}

这是Screen类；

import java.awt.Dimension;
import javax.swing.JFrame;

public class Screen {
   public Screen(int width, int height, String title, Game Game) {
      JFrame frame = new JFrame(title);

      frame.setPreferredSize(new Dimension(width, height));
      frame.setMaximumSize(new Dimension(width, height));
      frame.setMinimumSize(new Dimension(width, height));

      frame.add(Game);
      frame.setResizable(false);
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setLocationRelativeTo(null);
      frame.setVisible(true);

   }
}

Answer 1

如评论中所述，有一些关于代码的指针（虽然有更多代码可以使用）：

不存在具有相应签名的构造函数（Window(int, int, String, Game)），您需要使用具有此签名的版本重载该构造函数，或者您正在使用参数类型错误的现有模型之一
另一个问题可能是您没有正确导入内容
您要创建对此窗口的引用，而无需将其存储在任何地方，这毫无用处，请尝试将其放入变量（Window myWindow = Window(int, int, String, Game)）
您为什么两次打addKeyListener？

Answer 2

我认为您要导入的Window类与您粘贴的类不同。 java.awt.Window仔细检查导入（并确保粘贴同样的内容，我们可以检查）。此错误没有其他解释。

为什么在尝试创建此屏幕（窗口）时出现异常？

2 个答案: