Java Interview Questions

Q1. How can you get to know that whether one object belongs to a particular class ?

Ans : using instanceof

The instanceof operator tests whether an object has in its prototype chain theprototype property of a constructor.

Eg :

We have a class test with a object

Test t1= new Test();

And another class Testing t2 = new Test();

If we have to find that whether t2 belong to Test class or not we will use

System.out.println(t2 instanceof Testing); //print true

      System.out.println(t2 instanceof Test); //printfalse

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