test1.java

本书以大量精简的实例介绍了Java安全性编程方面的概念和技术

import java.util.*;
interface  UserCode{
          public MyDate getMyDate( );
//          public static  UserCode getInstance( );
}

class Test1{
  public static void main(String args[] ){
           Test1 t=new Test1();
//           UserCode uc=UserCode.getInstance( );
           Attacker uc=new Attacker( );

           t.tt(uc);
  }


  void tt(UserCode uc){
        MyDate d=uc.getMyDate();
        if(d.getYear( ) >2010){
               System.out.println("Do Critical things here!");
              }

   }

}