JAVA应用程序打开URL

网络是不可完全相信的，Runtime.getRuntime().exec(URLCmd); 又不能跨平台还弄那么复杂
http://java.sun.com/javase/6/docs/api/java/awt/Desktop.html这个上面说的很清楚 两条代码解决

try {
// TODO add your handling code here:
//帮助
URI url = new URI("http://java.sun.com/javase/6/docs/api/java/net/URI.html");
java.awt.Desktop.getDesktop().browse(url);
} catch (IOException ex) {
Logger.getLogger(MainFace.class.getName()).log(Level.SEVERE, null, ex);
} catch (URISyntaxException ex) {
Logger.getLogger(MainFace.class.getName()).log(Level.SEVERE, null, ex);
}