//: 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 class perfecttime
　　extends unicastremoteobject
　　implements perfecttimei {
　　// implementation of the interface:
　　public long getperfecttime()
　　throws remoteexception {
　　return system.currenttimemillis();
　　}
　　// must implement constructor
　　// to throw remoteexception:
　　public perfecttime() throws remoteexception {
　　// super(); // called automatically
　　}
　　// registration for rmi serving. throw
　　// exceptions out to the console.
　　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 remoteexception;
　　} ///:~
　　//: c15:rmi:displayperfecttime.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 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());
　　}
　　} ///:~
　　grant {
　　// allow everything for now
　　permission java.security.allpermission;
　　};
　　
　　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 displayperfecttime
　　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classpath中加入：f:/rmi