写动画程序，界面如下图所示。要求绘制一只兔子，令其从界面左端出发，移动到界面右端后停止

以下是一个简单的Java动画程序，绘制一只兔子，让它从左端移动到右端并停止。这个程序使用Java Swing库来创建GUI，使用Java Graphics2D库来绘制兔子。

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class RabbitAnimation extends JPanel implements Runnable {

    private static final int WIDTH = 600;
    private static final int HEIGHT = 400;
    private static final int RABBIT_WIDTH = 100;
    private static final int RABBIT_HEIGHT = 80;
    private static final int DELAY = 10;
    private int rabbitX;
    private Thread animator;

    public RabbitAnimation() {
        rabbitX = -RABBIT_WIDTH;
    }

    public void paint(Graphics g) {
        super.paint(g);
        Graphics2D g2d = (Graphics2D) g;
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setColor(Color.ORANGE);
        g2d.fillOval(rabbitX, HEIGHT / 2 - RABBIT_HEIGHT / 2, RABBIT_WIDTH, RABBIT_HEIGHT);
    }

    public void run() {
        while (rabbitX < WIDTH) {
            rabbitX += 1;
            repaint();
            try {
                Thread.sleep(DELAY);
            } catch (InterruptedException e) {
                System.out.println("interrupted");
            }
        }
    }

    public void start() {
        animator = new Thread(this);
        animator.start();
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("Rabbit Animation");
        RabbitAnimation rabbit = new RabbitAnimation();
        frame.add(rabbit);
        frame.setSize(WIDTH, HEIGHT);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        rabbit.start();
    }
}

这个程序通过继承JPanel类来创建一个自定义面板，然后在面板上绘制兔子。它使用一个线程来控制兔子的位置，并在每次移动后重新绘制兔子。程序在启动时创建一个JFrame窗口，将自定义面板添加到窗口中，并启动线程来控制动画。