// Purpose.  instanceof operator versus reflection [getClass(), getName()]

class ReflectInstanceOf {

   static class Base { }
   static class Derived extends Base { }
   static class Deep extends Derived { }
   static class Alone { }

   public static void main( String[] args ) {

      // "instanceof" returns true if the object is an instance of the
      // specifed class -- or -- an instance of some derived class
      Object[] objs = { new Base(), new Derived(), new Deep(), new Alone() };
      for (int i=0; i < objs.length; i++)
         if (objs[i] instanceof Base)
            System.out.println( objs[i].getClass().getName()
               + " IS an instanceof" );
         else
            System.out.println( objs[i].getClass().getName()
               + " is NOT an instanceof" );

      // the equality expression below returns true only if the object is
      // an instance of the specifed class  [Note the ".class" suffix]
      System.out.println();
      for (int i=0; i < objs.length; i++)
         if (objs[i].getClass() == Base.class)
            System.out.println( objs[i].getClass().getName() +" IS a Base");
         else
            System.out.println( objs[i].getClass().getName() +" is NOT a Base");
}  }

// Base IS an instanceof
// Derived IS an instanceof
// Deep IS an instanceof
// Alone is NOT an instanceof
//
// Base IS a Base
// Derived is NOT a Base
// Deep is NOT a Base
// Alone is NOT a Base