What is primitive Type in Java ?

There are some types which we use very frequently in Java programs known as primitive type and these types get special treatment. As to create any variable we need to make instance of a type using new keyword which creates an object in heap which is not efficient in cases of very frequent uses.

In cases of primitive type we don’t need to use new keyword to make variable, it automatically creates a variable which has not reference and stored on stack and holds value of that variable that is why it is more efficient.

Java determines the size of each primitive type. These sizes don’t change from one machine architecture to another. This means size of primitive type is same on all type of machine.

Here is list of java primitive types

Type	Contains	Default	Size	Range	Wrapper
boolean	true or false	false	Not defined, represent 1 bit information	NA	Boolean
char	Unicode character unsigned	u0000	16 bits or 2 bytes	0 to 2¹⁶-1 or u0000 to uFFFF	Character
byte	Signed integer	0	8 bit or 1 byte	-2⁷ to 2⁷-1 or -128 to 127	Byte
short	Signed integer	0	16 bit or 2 bytes	-2¹⁵ to 2¹⁵-1 or -32768 to 32767	Short
int	Signed integer	0	32 bit or 4 bytes	-2³¹ to 2³¹-1 or -2147483648 to 2147483647	Integer
long	Signed integer	0	64 bit or 8 bytes	-2⁶³ to 2⁶³-1 or -9223372036854775808 to 9223372036854775807	Long
float	IEEE 754 floating point single-precision	0.0f	32 bit or 4 bytes	?1.4E-45 to ?3.4028235E+38	Float
double	IEEE 754 floating point double-precision	0.0	64 bit or 8 bytes	?439E-324 to ?1.7976931348623157E+308	Double

All numeric types are signed. The size of the boolean type is not explicitly specified; it is only defined to be able to take the literal values true or false.

There are wrapper classes for the primitive data types allow you to make a nonprimitive object on the heap to represent that primitive type. For example:

char c = \'x\';
Character C = new Character(c);
Or you could also use:
Character C = new Character(\'x\');