Swing应用程序的加载动画示例

package com.jb.arklis.d2.demo; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Container; import java.awt.Dimension; import java.awt.event.ActionEvent; import javax.swing.AbstractAction; import javax.swing.Action; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JProgressBar; import javax.swing.SwingUtilities; import javax.swing.Timer; /** * 功能：书写一个进度条，用来表示应用正在装载之中 * 作者：Arklis zeng * 时间：2009-06-04 * 地点：成都公兴镇（Home） * 版本：ver 1.0.0 * 备注： * 控制进度条的关键是通过Action来实现。只要把createLoadButton和createStopButton中的事件处理代码放到自己想要的位置 * 就可以实现类似Eclipse启动时的装载动作！！！ * @author az * */ public class ProgressBarDemo extends JFrame { //设置一个计时器 private Timer timer = new javax.swing.Timer(18, createApplicationLoadAction()); private Action loadAction; private Action stopAction; private JProgressBar progressBar; private int length = 200; //进度的条的最大长度 public ProgressBarDemo() { setTitle("演示应用加载时的动画"); setSize(350, 150); init(); setDefaultCloseOperation(this.EXIT_ON_CLOSE); setLocationRelativeTo(null); setVisible(true); } private void init() { JPanel panel = new JPanel(); // 初始化进度条 progressBar = new JProgressBar(JProgressBar.HORIZONTAL, 0, length) { //重写父类的getPreferredSize方法 public Dimension getPreferredSize() { return new Dimension(300, super.getPreferredSize().height); } }; panel.add(BorderLayout.CENTER,progressBar); //放按钮 panel.add(BorderLayout.SOUTH,createLoadButton()); panel.add(BorderLayout.SOUTH,createStopButton()); Container container = getContentPane(); container.add(panel); } public Action createApplicationLoadAction() { return new AbstractAction("正在装载中...") { public void actionPerformed(ActionEvent e) { if (progressBar.getValue() < progressBar.getMaximum()) { progressBar.setValue(progressBar.getValue() + 1); } else { timer.stop(); loadAction.setEnabled(true); stopAction.setEnabled(false); } } }; } private JButton createLoadButton() { loadAction = new AbstractAction("开始") { public void actionPerformed(ActionEvent e) { loadAction.setEnabled(false); stopAction.setEnabled(true); if (progressBar.getValue() == progressBar.getMaximum()) { progressBar.setValue(0); } timer.start(); } }; return createButton(loadAction); } private JButton createStopButton() { stopAction = new AbstractAction("停止") { public void actionPerformed(ActionEvent e) { timer.stop(); loadAction.setEnabled(true); stopAction.setEnabled(false); } }; return createButton(stopAction); } private JButton createButton(Action action) { JButton button = new JButton(); button.setAction(action);//给按钮添加行为控制权限 return button; } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable(){ public void run() { // TODO Auto-generated method stub new ProgressBarDemo(); } }); } }