package com;

        class Hello {

             private native void print(); //定义native接口，，该方法为 对象内的，，所以执行慢
             private static native int get();
             private static native void set(int value);

             public static void main(String[] args) {

                 new Hello().print(); //非静态

                 System.out.println("--------static   return and parme----------");
                 System.out.println(get()); //静态
                 set(123);
                 System.out.println(get()); //静态

             }

             static {

                 System.loadLibrary("Hello");//加载 libHello.so

             }

         }

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

            #ifndef _Included_com_Hello
            #define _Included_com_Hello
            #ifdef __cplusplus
            extern "C" {
            #endif
            /*
             * Class:     com_Hello
             * Method:    print
             * Signature: ()V
             */
            JNIEXPORT void JNICALL Java_com_Hello_print
              (JNIEnv *, jobject);

            /*
             * Class:     com_Hello
             * Method:    get
             * Signature: ()I
             */
            JNIEXPORT jint JNICALL Java_com_Hello_get
              (JNIEnv *, jclass);

 #include <jni.h>

        #include <stdio.h>

        #include "com_Hello.h"


        int i = 0;
        JNIEXPORT void JNICALL Java_com_Hello_print(JNIEnv *env, jobject obj)

        {

            printf("Hello World!/n");

            return;

        }



        JNIEXPORT jint JNICALL Java_com_Hello_get(JNIEnv *env, jclass jc)
        {
            return i;
        }

        JNIEXPORT void JNICALL Java_com_Hello_set(JNIEnv *env, jclass jc, jint j)

        {
            printf("set the value: sss");
            i = j;
        }