SCJP Certification

The instanceof operator is a binary operator that determines at runtime whether its left operand is an instance of its right operand.
Syntax:

obj instanceof type

where, obj (the left operand) must be an instance of a class and type (the right operand) may be a class, interface, or an array type. The instanceof operator evaluates to true if the left operand is of the specified type or can be cast to the specified type. Otherwise, it evaluates to false. The instanceof operator cannot be used with primitive data types.

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