How to use Instanceof Operator in Java?

Instanceof  Operator determine the type of an object(Class type/ Interface type/Array type).Instanceof Operator verifies whether its first operand is an instance of its second.


Syntax of instanceof
A instanceof B

A must be the name of an object and B  must be the name of a class/interface/array type.

An object is considered to be an instance of a class if the object directly or indirectly descends from that class.

As Example:

class X {
}


class Y extends X{
}

X x = new Y();

if (x instanceof  X) {

   System.out.println("Instance of  X");

}



if (x instanceof  Y) {

   System.out.println("Instance of  Y");

}

In the above Example, the Output  will be Instance of  X
Instance of  Y