iapp调用java，各位大佬谁能教一下这个怎么调用啊

import java.awt.Dimension;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JButton;import javax.swing.SwingWorker;import javax.swing.Timer;public class PanelAnimation extends JFrame { private static final int WIDTH = 400; private static final int HEIGHT = 300; private static final int ANIMATION_DURATION = 1000; // 动画时长，单位毫秒 private JPanel panel; private JButton button; private boolean isExpanded = false; public PanelAnimation() { super(