There are two forms of datatypes in Java:

• Primitive data type
• Non-Primitive data type

• bool: Boolean data type consists of true and false values.
• char: char datatype is used to store characters.
• byte: The main purpose of byte is to save memory and consists of values in the range -128 to 127.
• short: Consists of values in the range -32768 to 32767.
• int: Consists of values in the range -2,147,483,648 to 2,147,483,647.
• long: Consists of values in the range -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807.
• float: Can be used to deal with decimal numbers. Always recommended to use float rather than double because float saves memory.
• double: Can be used to deal with decimal numbers.

Data Type	Size	Range
bool	1 bit	true, false
char	2 byte	a…z, A…Z
byte	1 byte	-27 to 27-1 (-128 to 127)
short	2 byte	-215 to 215-1 (-32768 to 32767)
int	4 byte	-231 to 231-1 (-2,147,483,648 to 2,147,483,647)
long	8 byte	-263 to 263-1 (-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807)
float	4 byte	6.022f
double	8 byte	3.142