Java - 最大化屏幕=缓冲区闪烁

Question

所以我正在关注 Youtube 上的 Java 教程。然而，“老师”仅将他的 JFrame 尺寸调整为 400x400px 左右。我希望我的全屏显示。所以我尝试摆弄我的代码(不只是想做 1920x1280 尺寸，因为我希望它在大多数分辨率下都可行)。

但是，当我尝试更改数字时，我对“JFrame.MAXIMIZED_BOTH”有点疯狂，因为我确信这会解决我所有的麻烦。你猜怎么着，它没有。由于我改变了很多，而且我不完全确定如何回到工作的点，所以我向您展示我的完整主类代码。主要包含绘制、循环和缓冲:

import java.awt.Canvas;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.image.BufferStrategy;
import java.awt.image.BufferedImage;

import javax.swing.JFrame;


public class Game extends Canvas implements Runnable{
    private static final long serialVersionUID = 1L;
    public static final int WIDTH = JFrame.MAXIMIZED_BOTH, HEIGHT = JFrame.MAXIMIZED_BOTH, SCALE = 3;
    public static boolean running = false;
    public Thread gameThread;

    private BufferedImage spriteSheet;

    private Player player;

    public void init(){
        ImageLoader loader = new ImageLoader();
        spriteSheet = loader.load("/Grass_road.png");

        SpriteSheet ss = new SpriteSheet(spriteSheet);

        player = new Player(0, 0, ss);
    }

    public synchronized void start(){
        if(running)return;
        running = true;
        gameThread = new Thread(this);
        gameThread.start();
    }
    public synchronized void stop(){
        if(!running)return;
        running = false;
        try {
            gameThread.join();
        } catch (InterruptedException e) {e.printStackTrace();}
    }

    public void run(){
        init();
        long lastTime = System.nanoTime();
        final double amountOfTicks = 60D;
        double ns = 1000000000 / amountOfTicks;
        double delta = 0;

        while(running){
            long now = System.nanoTime();
            delta += (now - lastTime) / ns;
            lastTime = now;
            if(delta >= 1){
                tick();
                delta--;
            }
            render();
        }
        stop();
    }
    public void tick(){
        player.tick();
    }
    public void render(){
        BufferStrategy bs = this.getBufferStrategy();
        if(bs == null){
            createBufferStrategy(3);
            return;
        }
        Graphics g = bs.getDrawGraphics();
        //RENDER HERE
        g.fillRect(0, 0, JFrame.MAXIMIZED_BOTH, JFrame.MAXIMIZED_BOTH);

        player.render(g);

        //END RENDER
        g.dispose();
        bs.show();
    }

    public static void main(String[] args){
        Game game = new Game();
        game.setPreferredSize(new Dimension(WIDTH, HEIGHT));
        game.setMaximumSize(new Dimension(WIDTH, HEIGHT));
        game.setMinimumSize(new Dimension(WIDTH, HEIGHT));

        JFrame frame = new JFrame("Battle Beasts");
        frame.setSize(WIDTH, HEIGHT);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setResizable(true);
        frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
        frame.setUndecorated(true);
        frame.add(game);
        frame.setVisible(true);

        game.start();
    }

我确实成功地获得了全屏并删除了边框。现在我在角落里有一个非常小的盒子，只有几个像素。休息是前所未有的闪烁。

底线，我的屏幕闪烁，因为我从“g.fillRect(0, 0, JFrame.MAXIMIZED_BOTH, JFrame.MAXIMIZED_BOTH);”行绘制的内容现在只填充了屏幕的一小部分。如何使其在所有分辨率下填满全屏？

编辑:安德鲁的步骤；

JFrame frame = new JFrame("Battle Beasts");
        frame.add(game);
        frame.pack();
        frame.setSize(WIDTH, HEIGHT);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setResizable(true);
        frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
        frame.setUndecorated(true);
        frame.setVisible(true);

        game.start();

Answer 1

How do I make it fill a fullscreen on all resolutions?

首先，去掉这些行:

    game.setPreferredSize(new Dimension(WIDTH, HEIGHT));
    game.setMaximumSize(new Dimension(WIDTH, HEIGHT));
    game.setMinimumSize(new Dimension(WIDTH, HEIGHT));

参见Should I avoid the use of set(Preferred|Maximum|Minimum)Size methods in Java Swing? (是的。)游戏应该重写 getPreferredSize() 以返回理想值，然后处理给定的任何值。

然后更改:

    JFrame frame = new JFrame("Battle Beasts");
    // ..
    frame.add(game);

致:

    JFrame frame = new JFrame("Battle Beasts");
    frame.add(game); // add this early on, then..
    frame.pack(); // immediately call pack()
    // ..