Operands and Results Using instanceof Operator : instanceof Operator « Operators « SCJP

1. SCJP
2. Operators
3. instanceof Operator

interface MyInterface { }
class Bar implements MyInterface{ }
class Foo extends Bar { }


First Operand        instanceof Operand                           Result

null                 Any class or interface type                  false

Foo                  instance Foo, Bar, MyInterface, Object       true

Bar                  instance Bar, MyInterface, Object            true

Bar                  instance Foo                                 false

Foo [ ]              Foo, Bar, MyInterface                        false

Foo [ ]              Object                                       true

Foo [ 1 ]            Foo, Bar, MyInterface, Object                true