Reads a 16-bit/2-byte value from this.
In order to get the correct byte order for this read operation, see get_byte_order and set_byte_order.
| this |
a given DataInputStream. |
| cancellable |
optional Cancellable object, null to ignore. |
|
a signed 16-bit/2-byte value read from this or `0` if an error occurred. |