Bagaimanakah Benang Boleh Meningkatkan Pengendalian Pengikat Kunci dalam Permainan Dua Pemain?

Benang dengan Pengikatan Kunci

Dalam konteks yang diberikan, anda boleh menggunakan urutan yang berasingan untuk mengendalikan pengikatan kunci dan mengemas kini keadaan permainan. Ini membolehkan pemain mengawal dayung mereka secara bebas menggunakan kekunci yang berbeza dan memastikan kedua-dua pemain boleh menggerakkan dayung mereka secara serentak.

Berikut ialah contoh yang menunjukkan cara menggunakan pengikat kunci dengan benang:

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.util.HashSet;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicBoolean;

import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class Main {
    private static final int WIDTH = 600;
    private static final int HEIGHT = 500;

    public static void main(String[] args) {
        // Create a new game instance
        Game game = new Game(WIDTH, HEIGHT);

        // Create a thread pool to handle key bindings
        ExecutorService keyBindingPool = Executors.newCachedThreadPool();

        // Create key bindings for the two players
        KeyBindings player1Bindings = new KeyBindings(game, "W", "S");
        KeyBindings player2Bindings = new KeyBindings(game, "UP", "DOWN");

        // Install the key bindings using SwingUtilities to ensure they work on the EDT
        SwingUtilities.invokeLater(() -> {
            game.getComponent().getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_W, 0, false), "player1Up");
            game.getComponent().getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_S, 0, false), "player1Down");
            game.getComponent().getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0, false), "player2Up");
            game.getComponent().getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0, false), "player2Down");
            game.getComponent().getActionMap().put("player1Up", new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) { player1Bindings.up = true; }
            });
            game.getComponent().getActionMap().put("player1Down", new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) { player1Bindings.down = true; }
            });
            game.getComponent().getActionMap().put("player2Up", new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) { player2Bindings.up = true; }
            });
            game.getComponent().getActionMap().put("player2Down", new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) { player2Bindings.down = true; }
            });
        });

        // Add the key bindings to the thread pool
        keyBindingPool.submit(player1Bindings);
        keyBindingPool.submit(player2Bindings);

        // Start the game loop
        game.start();
    }

    private static class Game {
        private final int width;
        private final int height;
        private final Paddle paddle1;
        private final Paddle paddle2;
        private final Thread gameLoopThread;
        private final AtomicBoolean running;

        public Game(int width, int height) {
            this.width = width;
            this.height = height;
            this.paddle1 = new Paddle(0, 100, 10, 100);
            this.paddle2 = new Paddle(width - 10, 200, 10, 100);
            this.running = new AtomicBoolean(false);
            this.gameLoopThread = new Thread(this::gameLoop);
        }

        public void start() {
            running.set(true);
            gameLoopThread.start();
        }

        private void gameLoop() {
            while (running.get()) {
                // Update the game state based on the key bindings
                if (player1Bindings.up) { paddle1.moveUp(); } else if (player1Bindings.down) { paddle1.moveDown(); }
                if (player2Bindings.up) { paddle2.moveUp(); } else if (player2Bindings.down) { paddle2.moveDown(); }

                // Render the game on the screen
                paint();
            }
        }

        public void paint() {
            // Clear the screen
            // Draw the paddles
            // Draw the ball
            // Update the display
        }

        public JComponent getComponent() { return null; }
    }

    private static class KeyBindings implements Runnable {
        private final Game game;
        private final String upKey;
        private final String downKey;
        private final HashSet<String> keysPressed;
        public boolean up;
        public boolean down;
        private AtomicBoolean running;

        public KeyBindings(Game game, String upKey, String downKey) {
            this.game = game;
            this.upKey = upKey;
            this.downKey = downKey;
            this.keysPressed = new HashSet<>();
            this.running = new AtomicBoolean(false);
        }

        public void start() {
            running.set(true);
        }

        @Override
        public void run() {
            while (running.get()) {
                // Check for key presses
                if (keysPressed.contains(upKey)) { up = true; } else { up = false; }
                if (keysPressed.contains(downKey)) { down = true; } else { down = false; }

                // Sleep for a bit
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {}
            }
        }
    }

    private static class Paddle {
        private int x;
        private int y;
        private int width;
        private int height;

        public Paddle(int x, int y, int width, int height) { this.x = x; this.y = y; this.width = width; this.height = height; }

        public void moveUp() { if (y > 0) { y -= 5; } }
        public void moveDown() { if (y < game.getHeight() - height) { y += 5; } }
    }
}

Dalam contoh ini:

• Kelas Permainan menguruskan keadaan permainan dan memulakan dayung. Ia juga memulakan benang gelung permainan.
• Kelas KeyBindings digunakan untuk mengendalikan pengikatan kunci. Ia mendengar tekanan kekunci dan mengemas kini keadaan permainan dengan sewajarnya.
• Kelas Paddle mewakili dayung yang dikawal oleh pemain.
• Kaedah utama mencipta contoh permainan baharu dan memasang pengikat kunci menggunakan SwingUtilities. Ia juga memulakan gelung permainan.

Contoh ini memastikan kedua-dua pemain boleh menggerakkan dayung mereka secara bebas menggunakan kekunci yang berbeza dan keadaan permainan dikemas kini dengan lancar dan responsif.

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