Hackforge Academy

Explanation

int is a primitive data type in Java
that stores 32-bit integer values.

Code:

int a = 10;

Explanation

Integer is a wrapper class that wraps an
int into an object.

Code:

Integer b = 20;

Explanation

int cannot be null, whereas Integer can
store null.

Code:

Integer x = null;
// int y = null; // Compilation error

Explanation

Integer provides utility methods like
parseInt() and valueOf().

Code:

int num = Integer.parseInt("100");

Explanation

Autoboxing converts int to Integer
automatically.

Code:

Integer obj = 5; // Autoboxing