如何在秋千中创建通知 [英] How to create a notification in swing
本文介绍了如何在秋千中创建通知的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
使用Java和Swing，是否有任何（方便）方法来创建通知？
通知我的意思是：
解决方案
您可能需要一个没有装饰的半透明框架。
快速演示
OSX
]
您可以利用JLabel显示简单的HTML
import java.awt。*;
import java.awt.event。*;
import javax.swing。*;
import java.text。*;
import java.util.Date;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
/ **
*关于半透明窗口
*如何用于显示系统时钟的简单演示。
* @author< a href =http://stackoverflow.com/users/20654/oscarryz> Oscar Reyes< / a>
* /
class Translucent extends JPanel实现ActionListener {
private static final SimpleDateFormat sdf = new SimpleDateFormat（HH：mm：ss）;
private final Date now = new Date（）;
private final Timer timer = new Timer（1000，this）;
private final JLabel text = new JLabel（）;
public Translucent（）{
super（true）;
timer.start（）;
}
@Override
public void actionPerformed（ActionEvent e）{
now.setTime（System.currentTimeMillis（））;
text.setText（String.format（< html>< body>< font size = '50'>％s< / font>< / body>< / html>，sdf （现在）））.format;
}
public static void main（String [] args）{
JFrame f = new JFrame（）;
f.setUndecorated（true）;
setTranslucency（f）;
f.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）;
f.setBackground（new Color（0f，0f，0f，1f / 3f））;
JPanel p = new Translucent（）;
JLabel l =新JLabel（Hola）;
l.setFont（new Font（l.getFont（）。getName（），Font.PLAIN，128））;
p.add（l）;
f.add（p）;
f.pack（）;
f.setLocationRelativeTo（null）;
f.setVisible（true）;
}
//取自：http：//java.sun.com/developer/technicalArticles/GUI/translucent_shaped_windows/
private static void setTranslucency（Window window）{
try {
Class<？> awtUtilitiesClass = Class.forName（com.sun.awt.AWTUtilities）;
方法mSetWindowOpacity = awtUtilitiesClass.getMethod（setWindowOpacity，Window.class，float.class）;
if（！mSetWindowOpacity.isAccessible（））{
mSetWindowOpacity.setAccessible（true）;
}
mSetWindowOpacity.invoke（null，window，Float.valueOf（0.75f））;
} catch（NoSuchMethodException ex）{
ex.printStackTrace（）;
} catch（SecurityException ex）{
ex.printStackTrace（）;
} catch（ClassNotFoundException ex）{
ex.printStackTrace（）;
} catch（IllegalAccessException ex）{
ex.printStackTrace（）;
} catch（IllegalArgumentException ex）{
ex.printStackTrace（）;
} catch（InvocationTargetException ex）{
ex.printStackTrace（）;
}
}
}
Using Java and Swing, is there any (convenient) way to create a notification? By notification, I mean something like:
this http://productivelinux.com/images/notify-osd-screenshot.png, this http://images.maketecheasier.com/2010/01/kfirefox-notify-indexed.png, or
(Is there a more correct term for that?). It would be nice if it worked cross-platform, but I'm mainly concerned with it working under Ubuntu with Gnome. If at all possible, I would like to avoid having an icon in the system tray / notification area.
If all else fails, I could always use the sliding notification from Sliding Notification bar in java (a la Firefox)
解决方案
You might need a translucent frame without decorations.
Quick demo
OSX
]
You can take advantage JLabel displays simple HTML
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.text.*;
import java.util.Date;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
/**
* Simple demo on how a translucent window
* looks like when is used to display the system clock.
* @author <a href="http://stackoverflow.com/users/20654/oscarryz">Oscar Reyes</a>
*/
class Translucent extends JPanel implements ActionListener {
private static final SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
private final Date now = new Date();
private final Timer timer = new Timer(1000, this);
private final JLabel text = new JLabel();
public Translucent() {
super(true);
timer.start();
}
@Override
public void actionPerformed(ActionEvent e) {
now.setTime(System.currentTimeMillis());
text.setText(String.format("<html><body><font size='50'>%s</font></body></html>",sdf.format(now)));
}
public static void main(String[] args) {
JFrame f = new JFrame();
f.setUndecorated(true);
setTranslucency(f);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setBackground(new Color(0f, 0f, 0f, 1f / 3f));
JPanel p = new Translucent();
JLabel l = new JLabel("Hola");
l.setFont(new Font(l.getFont().getName(), Font.PLAIN, 128));
p.add(l);
f.add(p);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
// taken from: http://java.sun.com/developer/technicalArticles/GUI/translucent_shaped_windows/
private static void setTranslucency( Window window){
try {
Class<?> awtUtilitiesClass = Class.forName("com.sun.awt.AWTUtilities");
Method mSetWindowOpacity = awtUtilitiesClass.getMethod("setWindowOpacity", Window.class, float.class);
if (!mSetWindowOpacity.isAccessible()) {
mSetWindowOpacity.setAccessible(true);
}
mSetWindowOpacity.invoke(null, window, Float.valueOf(0.75f));
} catch (NoSuchMethodException ex) {
ex.printStackTrace();
} catch (SecurityException ex) {
ex.printStackTrace();
} catch (ClassNotFoundException ex) {
ex.printStackTrace();
} catch (IllegalAccessException ex) {
ex.printStackTrace();
} catch (IllegalArgumentException ex) {
ex.printStackTrace();
} catch (InvocationTargetException ex) {
ex.printStackTrace();
}
}
}
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