In Java there are total 8 data types available which are further divided into 4 groups viz. integers, floating point numbers, character & boolean values.
|
Type |
Size in Bytes (Bits) |
Range |
Default value |
Contains |
| Integers | ||||
| Byte | 1 byte (8 bits) | -128 to 127 | 0 | Signed Integer |
| Short | 2 bytes
(16 bits) |
-32768 to 32767 | 0 | Signed Integer |
| Int | 4 bytes
(32 bits) |
-2147483648 to 2147483647 | 0 | Signed Integer |
| Long | 8 bytes
(64 bits) |
-9223372036854775808 to 9223372036854775807 | 0 | Signed Integer |
| Floating point numbers | ||||
| Float | 4 bytes
(32 bits) |
-3.4e38 to 3.4e38
(i.e. 3.4*1017) |
0.0 | IEEE754 Floating point number |
| Double | 8 bytes
(64 bits) |
-1.7e308 to 1.7e308
(i.e. 1.7*10151) |
0.0 | IEEE754 Floating point number |
| Characters | ||||
| char | 2 bytes
(16 bits) |
\u0000 to \uFFFF | \u0000 | Unicode Characters |
| Boolean values | ||||
| boolean | 1 bit | Not Applicable | False | true or false |
|
Table : Data Types in Java |
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