Data Types in Java

Data Types in Java

Java language has a rich implementation of data types. Data types specify size and the type of values that can be stored in an identifier.

In Java, data types are classified into two categories :

1. Primitive Datatype.
2. Non-Primitive Datatype.

1) Primitive Datatype

A primitive data type can be of eight types 

Primitive Data types
char	boolean	byte	short	int	long	float	double

Once a primitive data type has been declared its type can never change, although in most cases its value can change. These eight primitive type can be put into four groups

Integer

This group includes byte, short, int, long

byte : It is 8 bit integer data type. Value range from -128 to 127. Default value zero. example: byte b=10;

short : It is 16 bit integer data type. Value range from -32768 to 32767. Default value zero. example: short s=11;

int : It is 32 bit integer data type. Value range from -2147483648 to 2147483647. Default value zero. example: int i=10;

llong:It is 64 bit integer data type. Value range from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807. Default value zero. example: long l=100012;

Floating-Point Number

This group includes float, double

float : It is 32 bit float data type. Default value 0.0f. example: float ff=10.3f;

double : It is 64 bit float data type. Default value 0.0d. example: double db=11.123;