Mapping Types
The following table shows an overview of types mapping between Java and native code and supported by the JNA library.
| Native Type | Size | Java Language Type | Common Windows Types |
|---|---|---|---|
| char | 8-bit integer | byte | BYTE, TCHAR |
| short | 16-bit | short | short WORD |
| wchar_t | 16/32-bit character | char | WCHAR, TCHAR |
| int | 32-bit integer | int | DWORD |
| int | boolean value | boolean | BOOL |
| long | 32/64-bit integer | NativeLong | LONG |
| long long, __int64 | 64-bit integer | long | |
| float | 32-bit FP | float | |
| double | 64-bit FP | double | |
| char* | C string | String | LPCTSTR |
| void* | pointer | Pointer | LPVOID, HANDLE, LPXXX |
Note: The meaning of TCHAR changes between char and wchar_t according to some preprocessor definitions. LPCTSTR follows.
Read more about this topic: Java Native Access
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