public   class  TUID {
    
     /**
     * Pointer to native TUID instance
     */
     private   long  tuidPoinger; //32-bit pointer to native structure

     public  TUID() {
         this .tuidPoinger = init();
    }

     public   native   int [] getU();

     public   native   void  setU( int [] u);

     public   native   int  getA();

     public   native   void  setA( int  a);

     public   native   byte  getS();

     public   native   void  setS( byte  s);

     public   native   byte  getReserv();

     public   native   void  setReserv( byte  reserv);

    /**
     * to allocate native TUID
     *
     * @return native TUID pointer
     */
     private   native   long  init();

    /**
     * to destroy native TUID
     */
     private   native   void  destroy();

     protected   void  finalize()  throws  Throwable {
        destroy();
         super .finalize();
    }
}

/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class TUID */

#ifndef _Included_TUID
#define _Included_TUID
#ifdef __cplusplus
extern "C" {
#endif
/*
 * Class:     TUID
 * Method:    getU
 * Signature: ()[I
 */
JNIEXPORT jintArray JNICALL Java_TUID_getU
  (JNIEnv *, jobject);

/*
 * Class:     TUID
 * Method:    setU
 * Signature: ([I)V
 */
JNIEXPORT void JNICALL Java_TUID_setU
  (JNIEnv *, jobject, jintArray);

/*
 * Class:     TUID
 * Method:    getA
 * Signature: ()I
 */
JNIEXPORT jint JNICALL Java_TUID_getA
  (JNIEnv *, jobject);

/*
 * Class:     TUID
 * Method:    setA
 * Signature: (I)V
 */
JNIEXPORT void JNICALL Java_TUID_setA
  (JNIEnv *, jobject, jint);

/*
 * Class:     TUID
 * Method:    getS
 * Signature: ()B
 */
JNIEXPORT jbyte JNICALL Java_TUID_getS
  (JNIEnv *, jobject);

/*
 * Class:     TUID
 * Method:    setS
 * Signature: (B)V
 */
JNIEXPORT void JNICALL Java_TUID_setS
  (JNIEnv *, jobject, jbyte);

/*
 * Class:     TUID
 * Method:    getReserv
 * Signature: ()B
 */
JNIEXPORT jbyte JNICALL Java_TUID_getReserv
  (JNIEnv *, jobject);

/*
 * Class:     TUID
 * Method:    setReserv
 * Signature: (B)V
 */
JNIEXPORT void JNICALL Java_TUID_setReserv
  (JNIEnv *, jobject, jbyte);

/*
 * Class:     TUID
 * Method:    init
 * Signature: ()J
 */
JNIEXPORT jlong JNICALL Java_TUID_init
  (JNIEnv *, jobject);

/*
 * Class:     TUID
 * Method:    destroy
 * Signature: ()V
 */
JNIEXPORT void JNICALL Java_TUID_destroy
  (JNIEnv *, jobject);

#ifdef __cplusplus
}
#endif
#endif

#include "TUID.h"

JNIEXPORT jint JNICALL Java_TUID_getA(JNIEnv * env, jobject this){
          jclass cls = (*env)->GetObjectClass(env, this);
	  jfieldID fid = (*env)->GetFieldID(env, cls, "tuidPoinger", "J");
	  TUID * pTUID; 
	jint p = (*env)->GetLongField(env,this, fid);
	pTUID =(TUID *) p;
	  return (jint)pTUID->A;
}


JNIEXPORT jlong JNICALL Java_TUID_init(JNIEnv * env, jobject this){
	  TUID * pTUID = (TUID *)malloc(sizeof(struct TUID));
	  return (jint)pTUID;
}

и так для остальных методов