4 Java program JNI calls C ++ to create a Java object

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 encode (jnienv * ENV, jclass jclazz) {jclass date = env-> findclass ("Java/util/date"); // create a date instance jmethodid method_date_init = env-> getmethodid (date, "<init> ", "() V"); // obtain the constructor method object jobject now = env-> newobject (date, method_date_init ); // obtain the current date object jmethodid method_date_execute = env-> getmethodid (date, "gettime", "() J"); jlong time = env-> calllongmethod (now, method_date_execute ); cout <time <Endl ;}