Question

When a Java array will throw NullPointerException?

Answer 1

A null pointer exception is thrown Whenever you try to

Call the instance method of a null object.

Access, modify, print, a null value.

Trying to access (print/use in statements) the length of the null value.

Throw a null value.

Access an element of an array without initializing it.

Then, a Null Pointer Exception will be thrown.

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Answer 2

NullPointerException is thrown when an application attempts to use an object reference that has the null value. These include: Calling an instance method on the object referred by a null reference.