请问一个java配置的问题

[zzningxp]

我运行jnlp的时候遇到了这个问题"java.net.MalformedURLException: unknown protocol: socket"
搜索得到以下解决方法：

Firefox is set as default browser, I use JRE 1.6 Sun and I regularly get this message: "java.net.MalformedURLException: unknown protocol: socket"

* See http://forum.java.sun.com/thread.jspa?threadID=5127788
* This is a Sun JRE 1.6 issue dealing with proxy settings. To fix it :

1) go to Control Panel -> Java
2) click the Network Settings button
3) Select Direct Connection,

and click ok a couple of times to exit

但是这个是xp下的解决方法，不知道相应的ubuntu解决方法是什么？