注：本文所涉及代码转自thinking in java ,但有改动
四个文件：
//: c15:rmi:PerfectTime.java
// From "Thinking in Java, 2nd ed." by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// The implementation of
// the PerfectTime remote object.
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.registry.*;
import java.net.*;

public cla  PerfectTime
extends UnicastRemoteObject
implements PerfectTimeI {
// Implementation of the interface:
public long getPerfectTime()
throws RemoteException {
return System.currentTimeMillis();
}
// Must implement co tructor
// to throw RemoteException:
public PerfectTime() throws RemoteException {
// super(); // Called automatically
}
// Registration for RMI serving. Throw
// exceptio  out to the co ole.
public static void main(String[] args) throws Exception {
PerfectTime pt = new PerfectTime();
Naming.rebind("/PerfectTime", pt);
System.out.println("Ready to do time");
}
} ///:~
//: c15:rmi:PerfectTimeI.java
// From "Thinking in Java, 2nd ed." by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// The PerfectTime remote interface.
import java.rmi.*;

interface PerfectTimeI extends Remote {
long getPerfectTime() throws RemoteExceptio 
} ///:~
//: c15:rmi:Di layPerfectTime.java
// From "Thinking in Java, 2nd ed." by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// Uses remote object PerfectTime.
import java.rmi.*;
import java.rmi.registry.*;

public cla  Di layPerfectTime {
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());
}
} ///:~
grant {
// Allow everything for now
permi ion java.security.AllPermi io 
};

存入于F:rmi下
操作步骤
F:rmi>java PerfectTime
Ready to do time
F:rmi>javac *.java
F:rmi>rmic PerfectTime
F:rmi>start rmiregistry
F:rmi>java PerfectTime
Ready to do time
另开一DOS窗口
F:rmi>java -Djava.security.policy=registerit.policy Di layPerfectTime
Perfect time = 1011585443953
Perfect time = 1011585443968
Perfect time = 1011585444000
Perfect time = 1011585444000
Perfect time = 1011585444015
Perfect time = 1011585444031
Perfect time = 1011585444031
Perfect time = 1011585444046
Perfect time = 1011585444062
Perfect time = 1011585444062
注意：如果在rmic PerfectTime时报找不到PerfectTime类，请在环境变量中的Cla ath中加入：F:rmi