JAVA类中把另2个JAVA类实例作为参数传递给JNI native函数,在VC中怎样调用这2个java类实例的成员变量/函数呢?

[ye_cl]

有3个JAVA类,mainclass把另2个java类实例作为参数传给JNI接口, 那么在VC中怎样调用这2个java类实例的成员变量/函数呢? 用env->GetObjectClass函数是得到mainclass这个JAVA类吧,在这边好象不行.
运行JAVA时.cpp文件中env->GetFieldID这一行出错,提示:"Unexpected Signal : EXCEPTION_ACCESS_VIOLATION occurred at PC=0x6D36448A...."

JAVA类:
public class mainclass {
SubClass1 subclass1 = new SubClass1;
SubClass2 subclass2 = new SubClass2;

public native void SetParams(SubClass1 ,SubClass2 );

...
SetParams(subclass1 ,subclass2);
...
}

.cpp文件中:
JNIEXPORT void JNICALL Java_joptionpane_Frame1_SetParams
(JNIEnv *env, jobject obj, jobject jsubclass1 , jobject jsubclass2)
{
...
jfieldID jfieldid = env->GetFieldID((jclass)jsubclass1,"TS_Ip1","I");
jint jIp1 = env->GetIntField(jsubclass1,jfieldid);
....
}

[ye_cl]

请大家进来来看看!!!

[rainman2001]

JNIEXPORT void JNICALL Java_joptionpane_Frame1_SetParams
(JNIEnv *env, jobject obj, jobject jsubclass1 , jobject jsubclass2)
{
...
jclass jsub1 = env->GetObjectClass(jsubclass1);
jfieldID jfieldid = env->GetFieldID(jsub1,"TS_Ip1","I");
int Ip1 = env->GetIntField(jsub1,jfieldid);
...
}

[rainman2001]

顺便问一下有没有用jni转换过linux或unix的动态库。

[AriDo]

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