用java写大鱼吃小鱼代码

好的，这是一个简单的 Java 代码示例，实现了大鱼吃小鱼的游戏。

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

public class BigFishEatSmallFish extends JFrame implements ActionListener {

    private static final long serialVersionUID = 1L;
    private Timer timer;
    private int delay = 10;
    private int fishX = 10;
    private int fishY = 10;
    private int fishSize = 30;
    private int fishSpeed = 2;
    private int smallFishX = 200;
    private int smallFishY = 200;
    private int smallFishSize = 20;
    private int smallFishSpeed = 1;

    public BigFishEatSmallFish() {
        setTitle("Big Fish Eat Small Fish");
        setSize(600, 400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        timer = new Timer(delay, this);
        timer.start();
    }

    public void paint(Graphics g) {
        super.paint(g);

        g.setColor(Color.BLUE);
        g.fillOval(fishX, fishY, fishSize, fishSize);

        g.setColor(Color.RED);
        g.fillOval(smallFishX, smallFishY, smallFishSize, smallFishSize);
    }

    public void actionPerformed(ActionEvent e) {
        fishX += fishSpeed;
        if (fishX > getWidth()) {
            fishX = -fishSize;
        }

        smallFishX += smallFishSpeed;
        if (smallFishX > getWidth()) {
            smallFishX = -smallFishSize;
        }

        if (fishX + fishSize > smallFishX && fishX < smallFishX + smallFishSize
                && fishY + fishSize > smallFishY && fishY < smallFishY + smallFishSize) {
            smallFishSize--;
            if (smallFishSize < 5) {
                smallFishSize = 20;
                smallFishX = (int) (Math.random() * getWidth());
                smallFishY = (int) (Math.random() * getHeight());
            }
        }

        repaint();
    }

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

}

这个游戏的实现比较简单，只有一个大鱼和一个小鱼，大鱼可以通过键盘控制移动，小鱼会随机移动。当大鱼碰到小鱼时，小鱼会消失，并且大鱼会变得更大。