PRIMITIVE DATA TYPES
• Primitive types
– “building blocks” for more complicated types
• Java is strongly typed
– All variables in a Java program must have a type
• Java primitive types
– portable across computer platforms that support Java
|
TYPE |
Size in Bytes |
VALUES |
|
boolean |
1 |
true or false |
|
Byte |
1 |
–128 to +127 (–27 to 27 – 1) |
|
Char |
2 |
’u0000’ to ’uFFFF’ (0 to 65535) |
|
short |
2 |
–32,768 to +32,767 (–215 to 215 – 1) |
|
Int |
4 |
–2,147,483,648 to +2,147,483,647 (–231 to 231 – 1) |
|
Float
|
4 |
-ive range:–3.4028234663852886E+38 to –1.40129846432481707e–45 +ive range:1.40129846432481707e–45 to 3.4028234663852886E+38 |
|
Long |
8 |
–9,223,372,036,854,775,808 to +9,223,372,036,854,775,807 (–263 to 263 – 1) |
|
Double
|
8 |
-ive range: –1.7976931348623157E+308 to –4.94065645841246544e–324 +ive range: 4.94065645841246544e–324 to 1.7976931348623157E+308 |