Java的小游戏加载界面

Java的小游戏加载界面可以使用Swing或JavaFX来实现。以下是一个使用Swing的加载界面示例：

import javax.swing.*;
import java.awt.*;

public class GameLoadingScreen extends JFrame {
    private static final int WIDTH = 400;
    private static final int HEIGHT = 200;
    private static final int BAR_WIDTH = 300;
    private JProgressBar progressBar;

    public GameLoadingScreen() {
        super("Game Loading Screen");
        setSize(WIDTH, HEIGHT);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        panel.setLayout(new BorderLayout());
        JLabel label = new JLabel("Loading...");
        label.setHorizontalAlignment(JLabel.CENTER);
        panel.add(label, BorderLayout.NORTH);

        progressBar = new JProgressBar(0, 100);
        progressBar.setPreferredSize(new Dimension(BAR_WIDTH, 30));
        progressBar.setStringPainted(true);
        panel.add(progressBar, BorderLayout.CENTER);

        add(panel);
        setVisible(true);
    }

    public void updateProgressBar(int value) {
        progressBar.setValue(value);
    }

    public void close() {
        setVisible(false);
        dispose();
    }
}

使用该类的示例代码如下：

public class Game {
    private GameLoadingScreen loadingScreen;

    public void start() {
        loadingScreen = new GameLoadingScreen();
        loadingScreen.setVisible(true);

        // 模拟加载过程
        for (int i = 0; i <= 100; i += 10) {
            loadingScreen.updateProgressBar(i);
            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        loadingScreen.close();
        // 游戏开始
    }
}

在游戏加载时创建GameLoadingScreen实例并显示，通过updateProgressBar方法更新进度条的值，加载完成后调用close方法关闭加载界面。