Primitive type | Size | Minimum | Maximum | Wrapper type |
boolean | 1-bit | Boolean | ||
char | 16-bit | Unicode 0 | Unicode 65535 | Character |
byte | 8-bit | -128 | +127 | Byte |
short | 16-bit | -32768 | 32768 | Short |
int | 32-bit | Integer | ||
long | 64-bit | Long | ||
float | 32-bit | IEEE754 | IEEE754 | Float |
double | 64-bit | IEEE754 | IEEE754 | Double |
void | Void |
所有的数字类型都是有符号的。