Data Types in Java

There are eight data types supported by Java. Primitive data types are predefined by java and named by a keyword.

byte:

• ·         It is 8-bit integer.
• ·         Range:- Minimum value is -128 (2^7) Maximum value is 127 (2^7 -1)
• ·         Default value is 0.
• ·         Example: byte a = 100 , byte b = -50

short:

• ·         It is a 16-bit Integer.
• ·         Range:- Minimum value is -32,768 (-2^15) Maximum value is 32,767 (2^15 -1)
• ·         Default value is 0.
• ·         Example: short a = 15000, short b = -15000

int:

• ·         Int data type is a 32-bit integer.
• ·         Range:- Minimum value is - 2,147,483,648.(-2^31) Maximum value is 2,147,483,647(2^31 -1)
• ·         The default value is 0.
• ·         Example: int a = 100000, int b = -200000

long:

• ·         Long data type is a 64-bit integer.
• ·         Range:- Minimum value is -2^63 Maximum value is 2^63 -1.
• ·         Default value is 0L.
• ·         Example: long a = 100000L, long b = -200000L

float:

• ·         Float data type is a single-precision 32-bit IEEE 754 floating point.
• ·         Default value is 0.0f.
• ·         Example: float f1 = 234.5f

double:

• ·         double data type is a double-precision 64-bit IEEE 754 floating point.
• ·         Default value is 0.0d.
• ·         Example: double d1 = 123.4

boolean:

• ·         boolean data type represents one bit of information.
• ·         Only two possible values: true and false.
• ·         Default value is false.
• ·         Example: boolean one = true

char:

• ·         char data type is a single 16-bit Unicode character.
• ·         Range:- Minimum value is '\u0000' (or 0)  Maximum value is '\uffff' (or 65,535 inclusive).
• ·         Example: char letter ='A'