Difference between instanceof and instanceOf

Hi,

Can anyone help me to differentiate between instanceof and instanceOf operators.

I know that the instanceof operator is used for checking an object is of particular type and its used for object reference variables only and other one instanceOf ??

Thanks

Neju

I have not read about instanceOf with a capital 'O'.I think we have only one instanceof operator.As you said, the instanceof operator is used to check if an object is an instance of a specific class or interface.

and other one instanceOf ??

And where did you find the other one ?

instanceOf with capital O can be used as variable name.
Exam creators use this to confuse you.
instanceof is java keyword which checks if perticular object is instance of the type..

You might be doing whizlabs exam. It's there where I saw a questions like this. instanceOf isn't a keyword, you can use it as class name, variable name or anything.

Hi,

I had a doubt when I was reading our Scjp Faq(under the topic:What are some potential trips/traps in the SCJP exam? )
Now its cleared.

Thanks to all of you.

Neju.

// : c10:FamilyVsExactType.java
// The difference between instanceof and class
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.

class Base {
}

class Derived extends Base {
}

public class FamilyVsExactType {

static void test(Object x) {
    System.out.println("Testing x of type " + x.getClass());
    System.out.println("x instanceof Base " + (x instanceof Base));
    System.out.println("x instanceof Derived " + (x instanceof Derived));
    System.out.println("Base.isInstance(x) " + Base.class.isInstance(x));
    System.out.println("Derived.isInstance(x) "
        + Derived.class.isInstance(x));
    System.out.println("x.getClass() == Base.class "
        + (x.getClass() == Base.class));
    System.out.println("x.getClass() == Derived.class "
        + (x.getClass() == Derived.class));
    System.out.println("x.getClass().equals(Base.class)) "
        + (x.getClass().equals(Base.class)));
    System.out.println("x.getClass().equals(Derived.class)) "
        + (x.getClass().equals(Derived.class)));
  }

public static void main(String[] args) {
    test(new Base());
    test(new Derived());

}
}

The question is actually about the difference between instanceof and instanceOf and not instanceof and .class/.getClass()...