关于java代理,请高手帮忙!!!!

[honey_001]

我在domino5下用java写代理,代码如下,很简单,但服务器却提示如下错误:
lotus.domino.agentbase.runNotes;
java.lang.NullThread.run;
lotus.domino.NotesThread.run...
请问是哪儿的问题?代理如下:
import lotus.domino.*;
import java.io.*;
import java.lang.*;

public class ggg extends AgentBase {

public void NotesMain() {

try {
Session session = getSession();
AgentContext agentContext = session.getAgentContext();

// (Your code goes here)
PrintWriter out=null;
out.println("dfd");

} catch(Exception e) {
e.printStackTrace();
}
}
}