java2db

instanceof keyword with an example in java



The instanceof keyword is useful to compare an object  of specific class/interface or specific type.

instanceof keyword Possible to know same class object and subclass “is a” type of its super class (inheritance concept) .
instanceof keyword Returns false , if instanceof with  null object.

instanceof keyword It returns true, when checking any class or interface object with Object using instanceof .
instanceof keyword Useful to know the object is an instance of a class that implement a particular interface.

1 Example for instanceof keyword :

2 Example for instanceof keyword :

Execution Result:

Line no 35 not printed , because we are comparing with a null value.

instanceof keyword Try to use instanceof keyword as less as possible,otherwise it should be consider as a bad design.




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