Java Swing中的透明窗体（Windows中消息提示框的制作）

import java.awt.MouseInfo;
import java.awt.Point;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JRootPane;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

import com.sun.awt.AWTUtilities;

/**
 * @author zhenyu tan
 * 2014年4月2日
 * 使用到了JDK1.6中新特性的透明窗体，所以必须要使用JDK1.6及其以上版本
 * 功能如下：
 * 1.窗体出现时逐渐清晰
 * 2.停留一会时间之后会自动逐渐模糊直至消失
 * 3.点击关闭按钮后逐渐模糊直至消失
 */
public class TipWindow {
	
	JFrame frame;
	JLabel label;
	JEditorPane editorPane;
	
	private int width;//窗体宽度
	private int height;//窗体高度
	private int stayTime;//休眠时间
	private String title;//消息标题
	private String message;//窗体内容
	private int style;//窗体样式
	
	static {
		try {
			UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel");
		} catch (ClassNotFoundException | InstantiationException
				| IllegalAccessException | UnsupportedLookAndFeelException e) {
			e.printStackTrace();
		}	
	}
	
	/**
	 * @param width 提示框宽度
	 * @param height 提示框高度
	 * @param stayTime 提示框停留时间
	 * @param style 提示框的样式
	 * @param title 提示框标题
	 * @param message 提示框内容（支持HTML标签）
	 */
	public TipWindow(int width, int height, int stayTime, int style, String title, String message) {
		this.width = width;
		this.height = height;
		this.stayTime = stayTime;
		this.style = style;
		this.title = title;
		this.message = message;
	}
	
	public TipWindow(int stayTime, int style, String title, String message) {
		this.width = 300;
		this.height = 100;
		this.stayTime = stayTime;
		this.style = style;
		this.title = title;
		this.message = message;
	}
	
	public void initialize() {
		frame = new JFrame();
		editorPane = new JEditorPane();
		editorPane.setEditable(false);
		editorPane.setContentType("text/html");
		editorPane.setText(message);
		frame.add(editorPane);
		frame.setTitle(title);
		//设置窗体的位置及大小
		Point location = MouseInfo.getPointerInfo().getLocation();
		frame.setBounds((int)location.getX(), (int)location.getY(), width, height);
		frame.setUndecorated(true);//去掉窗口的装饰
		frame.getRootPane().setWindowDecorationStyle(style);//设置窗体样式
		AWTUtilities.setWindowOpacity(frame, 0);//初始化透明度
		frame.setVisible(true);
		frame.setAlwaysOnTop(true);//窗体置顶
		frame.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				hide();
			}
		});
	}
	
	//窗体逐渐变清晰
	public void show() {
		for (int i = 1; i < 20; i++) {
			try {
				Thread.sleep(50);
			} catch (Exception e) {
				AWTUtilities.setWindowOpacity(frame, i * 0.05F);
			}
		}
	}
	
	//窗体逐渐变淡甚至消失
	public void hide() {
		float opacity = 100;
		while(true) {
			if (opacity < 2) {
				break;
			}
			
			opacity -= 2;
			AWTUtilities.setWindowOpacity(frame, opacity / 100);
			try {
				Thread.sleep(150);
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		frame.dispose();
	}

	public void run() {
		initialize();
		show();
		try {
			Thread.sleep(stayTime * 1000);
		} catch (Exception e) {
			e.printStackTrace();
		}
		hide();
	}
	
	public static void main(String[] args) {
		String title = "友情提示！";
		String message = "主人!<br />该休息了！";
		TipWindow tipWindow = new TipWindow(2, JRootPane.QUESTION_DIALOG, title, message);
		tipWindow.run();
	}
}