Autoboxing and Unboxing in Java

Hi guys! Welcome you again to brajeshNotes. In today's session , we will talk about what is auto boxing and auto unboxing in java. So lets start without spending too much time 😊

Autoboxing : Process of converting the primitive value into its corresponding wrapper class value is called auto boxing. 

For example converting int to Integer class. Java compiler applies auto boxing when a primitive value is :

• Passed as parameter to a method and expect a corresponding wrapper class value.
• Assign to a variable of corresponding wrapper class.

Unboxing : Process of converting the wrapper value into its corresponding primitive value is called unboxing. 

For example converting Integer to int . Java compiler applies unboxing when a wrapper value is :

• Passed as parameter to a method and expect a corresponding primitive type value.
• Assign to a variable of corresponding primitive type.

Below table listed the primitive type and there corresponding wrapper classes , which are used by java compiler during autoboxing and unboxing process.

PRIMITIVE	WRAPPER
boolean	Boolean
bye	Byte
char	Character
float	Float
int	Integer
long	Long
short	Short
double	Double