能不能用Java写一个简单的愤怒的小鸟程序

当然可以，以下是一个简单的愤怒的小鸟程序的示例代码：

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

public class AngryBirds extends JFrame {
    private static final long serialVersionUID = 1L;

    private JPanel canvas;
    private Timer timer;
    private int x = 0, y = 100;
    private int vx = 5, vy = 0;
    private final int RADIUS = 30;
    private final int GRAVITY = 1;

    public AngryBirds() {
        setTitle("Angry Birds");
        setSize(800, 600);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        canvas = new JPanel() {
            private static final long serialVersionUID = 1L;

            @Override
            public void paintComponent(Graphics g) {
                super.paintComponent(g);
                g.setColor(Color.RED);
                g.fillOval(x - RADIUS, y - RADIUS, 2 * RADIUS, 2 * RADIUS);
            }
        };
        add(canvas, BorderLayout.CENTER);

        timer = new Timer(50, new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                x += vx;
                y += vy;
                vy += GRAVITY;
                if (y + RADIUS > canvas.getHeight()) {
                    y = canvas.getHeight() - RADIUS;
                    vy = -vy / 2;
                }
                canvas.repaint();
            }
        });
        timer.start();

        canvas.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                vx = (e.getX() - x) / 10;
                vy = (e.getY() - y) / 10;
            }
        });
    }

    public static void main(String[] args) {
        AngryBirds game = new AngryBirds();
        game.setVisible(true);
    }
}

这个程序使用了Java Swing库，实现了一个简单的小鸟游戏。在游戏中，玩家可以点击屏幕来发射小鸟，小鸟会受到重力的影响，落到地面时会弹起一定高度。玩家需要通过调整角度和力度，让小鸟飞到指定的目标位置。