In Java, null is a reserved word (keyword) for literal values. It seems like a keyword, but actually, it is a literal similar to true and false. The reserved word null is case sensitive and we cannot write null as Null or NULL, the compiler will not recognize them and give an error.

IS null function in Java?

Java Check if Object Is Null Using java.

One of the methods is isNull() , which returns a boolean value if the provided reference is null, otherwise it returns false. ... 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.

IS null == null in Java?

if(obj. equals(null)) // Which mean null. equals(null) when obj will be null. When your obj will be null it will throw Null Point Exception.