Syntax error Why is NullPointerException in Java?

Why is NullPointerException in Java?

NullPointerException is a runtime exception and it is thrown when the application try to use an object reference which has a null value.

For example, using a method on a null reference.

Object ref = null;
ref.toString(); // this will throw a NullPointerException
Updated on: 2020-02-25T05:02:26+05:30

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