Hi all,
			

			

			I have a native C++ function that supposedly get a new Object:
			

			

			//define:
			

			

			struct JavaStruct
			

			{
			

			char *JvmPath;
			

			char *JavaClassPath;
			

			JNIEnv *env;
			

			JavaVM *jvm;
			

			char *SampleClassName;
			

			char *SampleMethodName;
			

			jclass SampleClass;
			

			jmethodID SampleMethod;
			

			};
			

			

			int LoadSampleMethod(struct JavaStruct *pJavaStruct)
			

			{
			

			jthrowable exc;
			

			jclass j_string;
			

			jclass loaderClass;
			

			char infor[255], *buffer;
			

			char *FileName = "E:\JAVA\JniApp\HelloWorld.class";
			

			

			if(pJavaStruct->jvm == NULL || pJavaStruct->env == NULL) return -1;
			

			

			TFileStream *FileStream = new TFileStream(FileName, fmOpenRead);
			

			buffer = (char *)malloc(FileStream->Size+2);
			

			FileStream->Read(buffer, FileStream->Size);
			

			

			loaderClass = pJavaStruct->env->FindClass("java/lang/ClassLoader");
			

			jmethodID loaderMID = pJavaStruct->env->GetMethodID(loaderClass, "
			", "()V");
			

			if (loaderClass == NULL || loaderMID == NULL) return -1;
			

			

			jclass clazz = pJavaStruct->env->GetObjectClass(loaderClass);
			

			jobject loaderObj = pJavaStruct->env->NewObject(clazz, loaderMID);
			

			if (loaderObj == NULL) return -2;
			

			

			pJavaStruct->SampleClass = pJavaStruct->env->DefineClass(pJavaStruct->SampleClassName,
			

			loaderObj, buffer, FileStream->Size);
			

			

			if( pJavaStruct->SampleClass != 0 )
			

			{
			

			pJavaStruct->SampleMethod = pJavaStruct->env->GetStaticMethodID
			

			(
			

			pJavaStruct->SampleClass,
			

			pJavaStruct->SampleMethodName,
			

			"([Ljava/lang/String;)V"
			

			);
			

			}else
			

			{
			

			return -3;
			

			}
			

			

			free(buffer);
			

			FileStream->Free();
			

			

			return 0;
			

			}
			

			

			

			int _export _stdcall InitJavaStruct(struct JavaStruct *pJavaStruct)
			

			{
			

			LoadJavaVirtualMachineBcb(pJavaStruct);
			

			

			...
			

			

			LoadSampleMethod(pJavaStruct);
			

			

			...
			

			

			return 0;
			

			}
			

			

			

			when debugged, in the LoadSampleMethod fuction, the values of clazz and loaderMID
			

			look like valid(not null), but why NewObject return NULL? what problem happen?