How do you know if an object isNull?

The nonNull method is a static method of the Objects class in Java that checks whether the input object reference supplied to it is non-null or not . If the passed object is non-null, then the method returns true. If the passed object is null , then the method returns false.

A null object refers to an object without any reference or an object defined with neutral /null functionality/behavior. These null objects need to be checked to ensure that they are not null while accessing any member or invoking any methods.

To check if it is null, we call the isNull() method and pass the object getUserObject as a parameter . It returns true as the passed object is null.