Difference between INTEGER and INT

What is the difference between Integer and int?


Integer is a class(Wrapper Class) defined in the "java.lang" package,where as int is a primitive data type.

Integer can be used as an argument for a method that requires an object,where as int can be used for calculations.

An int holds a number, whereas Integer is a pointer that can reference an object that contains a number.

Integer can handle null. For int null would become 0(zero) and int cannot express null.

Here's list of Wrapper Classes and Primitive Data Types available in Java.

Wrapper Class	Primitive data type
Integer	Int
Byte	byte
Character	char
Short	short
Double	double
Boolean	boolean
Long	long