4Java程式JNI調用C++之C++建立Java對象

javacode:

package cn.com.cloud.sea.nativeTest;public class NativeCreateDate {public static void main(String[] args) {System.loadLibrary("NativeCreateDateDLL");showDate();}public native static void showDate();}

 

 

c++ code:

#include "cn_com_cloud_sea_nativeTest_NativeCreateDate.h"#include<iostream>using namespace std;JNIEXPORT void JNICALL Java_cn_com_cloud_sea_nativeTest_NativeCreateDate_showDate(JNIEnv * env, jclass jclazz){jclass date = env->FindClass("java/util/Date");//建立Date執行個體jmethodID method_date_init = env->GetMethodID(date,"<init>","()V");//獲得建構函式方法對象jobject now = env->NewObject(date,method_date_init);//獲得當期日期對象jmethodID method_date_execute = env->GetMethodID(date,"getTime","()J");jlong time = env->CallLongMethod(now,method_date_execute);cout<<time<<endl;}