send string from c++ to java

Hello,I send a string (char *) from c++ to java as a inputargument for a method. This works great. But if the string consists of 1-3 character(s) it doesn't work ("Unhandled exception in...(JVM.dll)...Access violation.")Can anybody help?Thanks

[279 byte] By [XMAS1000a] at [2007-11-26 22:33:53]

«« PATH doesn't work
»» Applet. Loading parameters.

# 1

What are you doing exactly?

Michael.Nazarov@sun.coma at 2007-7-10 11:41:19 >

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# 2

sorry,

I do this:

C++:

char *c="hello";

//char *c = "hi";

jclass cls = env->FindClass(javaClassname);

jmethodID mid = env->GetStaticMethodID(cls, "draw", "(Ljava/lang/String;)[B");

jbyteArray jByteArr = (jbyteArray) env->CallStaticObjectMethod(cls, mid, c); *

Java:

public static byte[] draw(String param){

...

}

If c="hello" the program works perfectly. But if c="hi" (1-3 characters) the prog cancels on *.

XMAS1000a at 2007-7-10 11:41:19 >

# 3

How do you access passed variable. Are you sure program hangs in native code, not in java code?BTW I'm not sure it's valid to pass C pointer as is. Don't it be converted using env->NewStringUTF( p )?

Michael.Nazarov@sun.coma at 2007-7-10 11:41:19 >

# 4

Yeah, I checked specially for you :)You should usejbyteArray jByteArr = ( jbyteArray )env->CallStaticObjectMethod( cls, mid, env->NewStringUTF( c ) );

Michael.Nazarov@sun.coma at 2007-7-10 11:41:19 >

# 5

I think (jbyteArray) env->CallStaticObjectMethod(cls, mid, c)the error is that c should not be passed as a parameter.env->NewStringUTF( c) will be called before the above calling.

Sean.Hoa at 2007-7-10 11:41:19 >

# 6

Yeah,thank you very much :-)

XMAS1000a at 2007-7-10 11:41:19 >

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