Java实现淡入淡出窗口

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一。代码

package org.bruce.vertices.extra.experiments;

/* * 
 * 淡入淡出窗口，淡出时，如果鼠标移进去了，则中止渐变。
 */
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.*;

public class GCFrame {
	protected static Timer timer;
	static JFrame jf;
	static float value = 1.0f;
	boolean isClicked = false;

	public GCFrame() {
		jf = new JFrame();
		JPanel jp = new JPanel();
		JButton jb = new JButton("淡出");
		jp.add(jb);
		jf.add(jp);
		jf.setSize(320, 240);
		jf.setVisible(true);
		// 添加按钮的监听事件
		timer = new Timer(100, new Tim1());
		jb.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				timer.start();
				isClicked = true;
				// 当鼠标移入窗口时，中止线程,当点击了“淡出”按钮后添加事件监听代码
				if (isClicked == true) {
					jf.addMouseListener(new MouseAdapter() {
						public void mouseEntered(MouseEvent e) {
							timer.stop();
							value = 1.0f;
							SwingUtilities.invokeLater(new Runnable() {
								public void run() {
									com.sun.awt.AWTUtilities.setWindowOpacity(jf, value);
								}
							});
						}

						public void mouseExited(MouseEvent e) {
							timer.start();
						}
					});
				}
			}
		});
	}

	static class Tim0 implements ActionListener {// 控制窗口打开时透明度的渐变
		public void actionPerformed(ActionEvent e) {
		}
	}

	static class Tim1 implements ActionListener {// 控制窗口关闭时透明度的渐变
		public void actionPerformed(ActionEvent e) {
			value -= 0.02f;
			if (value >= 0.02f) {
				SwingUtilities.invokeLater(new Runnable() {
					public void run() {
						com.sun.awt.AWTUtilities.setWindowOpacity(jf, value);
					}
				});
			} else {
				System.exit(0);
			}
		}
	}

	public static void main(String[] args) {
		new GCFrame();
	}
}

二。效果图