不知道错在哪了,帮忙看看。

Question

源码是三个文件，环境winxp+j2se+j2ee
//: c15:rmi:PerfectTimeI.java
 import java.rmi.*;
 public interface PerfectTimeI extends Remote {  long getPerfectTime() throws RemoteException;
} //: c15:rmi:PerfectTime.java
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.registry.*;
import java.net.*; public class PerfectTime extends UnicastRemoteObject  implements PerfectTimeI {  public long getPerfectTime()       throws RemoteException {    return System.currentTimeMillis();  }  public PerfectTime() throws RemoteException {  }
 
  public static void main(String[] args) throws Exception {    System.setSecurityManager(new RMISecurityManager());    PerfectTime pt = new PerfectTime();    Naming.bind( "PerfectTime", pt);    System.out.println("Ready to do time");  }}  
//: c15:rmi:DisplayPerfectTime.javaimport java.rmi.*;
import java.rmi.registry.*;
 
public class DisplayPerfectTime {  public static void main(String[] args)  throws Exception {    System.setSecurityManager( new RMISecurityManager());    PerfectTimeI t =  (PerfectTimeI)Naming.lookup( "PerfectTime");    for(int i = 0; i < 10; i++)      System.out.println("Perfect time = " +  t.getPerfectTime());  }}   
d:\jsdk\java>rmic DisplayPerfectTimed:\jsdk\java>start rmiregistryd:\jsdk\java>java DisplayPerfectTime
Exception in thread "main" java.security.AccessControlException: access denied (
java.net.SocketPermission 127.0.0.1:1099 connect,resolve)
        at java.security.AccessControlContext.checkPermission(Unknown Source)
        at java.security.AccessController.checkPermission(Unknown Source)
        at java.lang.SecurityManager.checkPermission(Unknown Source)
        at java.lang.SecurityManager.checkConnect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at java.net.Socket.<init>(Unknown Source)
        at java.net.Socket.<init>(Unknown Source)
        at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(Unknown Source)
        at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(Unknown Source)
        at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source)
        at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
        at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
        at sun.rmi.server.UnicastRef.newCall(Unknown Source)
        at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
        at java.rmi.Naming.lookup(Unknown Source)
        at DisplayPerfectTime.main(DisplayPerfectTime.java:25)
到底怎么改才能正常编译啊?