java.lang.Class.isInterface()

package com.codingdict;



import java.lang.*;



public class ClassDemo {



   public static void main(String[] args) {



      ClassDemo c = new ClassDemo();

      Class cls = c.getClass();



      // determines if the specified Class object represents an interface type

      boolean retval = cls.isInterface();

      System.out.println("It is an interface ? " + retval);       

   }

}