What is the use of instanceof keyword in java?

Answer 1

Sort of.
It doesn't tell you what type the variable is, rather, it returns you a boolean determining whether or not what is being compared is of the type you specified.

Example/

Object a = "A string";

if(a instanceof String){
// true
}

Answer 2

Now I understand, the name manifest itself "instance of" implies whether it is an intance(or object) of something or not.
like
ExampleClass s = new ExampleClass ();
boolean GotIt = s instanceof ExampleClass;
//true

Answer 3

indicating as parameter a variable name, it tells you which type (or which object) is the variable in question...