ThrowNew() with Japanese chars went wrong

Question

Hi All.
I want to throw exception that has Japanese chars from C++ code.
char szMsg[256];
// put Japanese chars into szMsg.
// ... and throw exception.
env->ThrowNew(exceptionClass, (const char*)szMsg);
Then, in Java code, it is displayed with unreadable characters like "????".
How can I get a readable string from C++?
Thank you.

Answer 1

Thank you for your reply.
But I'm not familiar with C++, could you tell me in detail?
My project is compiled with _MBCS option, and I tried to convert string to UNICODE to get readable string in JNI by using
(1) MultiByteToWideChar(...)
const char* szErrMsg = "...."; // including Japanese character
WCHAR szUnicodeMsg[256];
MultiByteToWideChar(GetACP(), 0, szErrMsg, -1, szUnicodeMsg,
sizeof(szUnicodeMsg)/sizeof(wchar_t));
env->ThrowNew(ExceptionCls, (const char*)szUnicodeMsg);
(2) mbstowcs(...)
mbstowcs(szUnicodeMsg, szErrMsg, strlen(szErrMsg)+1);
env->ThrowNew(ExceptionCls, (const char*)szUnicodeMsg);
(3) T2CW() macro
env->ThrowNew(ExceptionCls, (const char*)T2CW(szErrMsg));
Result
In case (1), unexpected string (like "B0D0F0H0J0?0") was displayed.
(by calling Throwable#getMessage() in JNI)
In case (2), only '?' was displayed in JNI.
In case (3), I got the same result as case (1).
Do you mean another way?
Thank you.