jvm.data_types.txt

+-----------------------------------------------------------------------------------------------------+
|  name   |  bits  | bytes  |  min  | actual min value           |  max   | actual max value          |
|---------+--------+--------+-------+----------------------------+--------+---------------------------|
| boolean |  1-bit |   --   | false |                            | true   |                           |
| byte    |  8-bit | 1-byte | -2^7  | -128                       | 2^7-1  | 127                       |
| short   | 16-bit | 2-byte | -2^15 | -32'768                    | 2^15-1 | 32'767                    |
| char    | 16-bit | 2-byte | 0     | '\u0000'                   | 2^16-1 | '\uffff'  (65535)         |
| int     | 32-bit | 4-byte | -2^31 | -2'147'483'648             | 2^31-1 | 2'147'483'647             |
| long    | 64-bit | 8-byte | -2^63 | -9'223'372'036'854'775'808 | 2^63-1 | 9'223'372'036'854'775'807 |
| float   | 32-bit | 4-byte | +/- -3.4028235 * 10^38             | +/- 3.4028235 * 10^38              |
| double  | 64-bit | 8-byte | +/- -1.7976931348623157 * 10^308   | +/- 1.7976931348623157 * 10^308    |
+-----------------------------------------------------------------------------------------------------+


-10^308  -10^38  -2^63    -2^31   -2^15  -2^7   0  1  2^7   2^15        2^16   2^31    2^63   10^38   10^308
                                                bool
                                         |----- byte ---)
                                  |------------ short ---------)
                                                |----------- char ---------)
                          |--------------------  int  ----------------------------)
                 |-----------------------------  long  -----------------------------------)
         {-------------------------------------  float  ------------------------------------------}
{----------------------------------------------  double ---------------------------------------------------}


1b    8b     16b             32b                             64b
      1B      2B              4B                              8B
bool
| byte |
|--- short ----|
|--- char  ----|
|------------ int -------------|
|----------- float ------------|
|--------------------------  long -----------------------------|
|-------------------------- double ----------------------------|