49 lines
1.7 KiB
C++
49 lines
1.7 KiB
C++
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#include "com_baeldung_jni_ExampleObjectsJNI.h"
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#include <iostream>
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/*
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* Class: com_baeldung_jni_ExampleObjectsJNI
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* Method: createUser
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* Signature: (Ljava/lang/String;D)Lcom/baeldung/jni/UserData;
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*/
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JNIEXPORT jobject JNICALL Java_com_baeldung_jni_ExampleObjectsJNI_createUser
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(JNIEnv *env, jobject thisObject, jstring name, jdouble balance){
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// Create the object of the class UserData
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jclass userDataClass = env->FindClass("com/baeldung/jni/UserData");
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jobject newUserData = env->AllocObject(userDataClass);
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// Get UserData fields to set
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jfieldID nameField = env->GetFieldID(userDataClass , "name", "Ljava/lang/String;");
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jfieldID balanceField = env->GetFieldID(userDataClass , "balance", "D");
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// Set the values of the new object
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env->SetObjectField(newUserData, nameField, name);
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env->SetDoubleField(newUserData, balanceField, balance);
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// Return the created object
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return newUserData;
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}
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/*
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* Class: com_baeldung_jni_ExampleObjectsJNI
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* Method: printUserData
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* Signature: (Lcom/baeldung/jni/UserData;)Ljava/lang/String;
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*/
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JNIEXPORT jstring JNICALL Java_com_baeldung_jni_ExampleObjectsJNI_printUserData
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(JNIEnv *env, jobject thisObject, jobject userData){
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// Find the class method id
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jclass userDataClass = env->GetObjectClass(userData);
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jmethodID methodId = env->GetMethodID(userDataClass, "getUserInfo", "()Ljava/lang/String;");
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// Call the object method and get the result
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jstring result = (jstring)env->CallObjectMethod(userData, methodId);
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// Print the result
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std::cout << "C++: User data is: " << env->GetStringUTFChars(result, NULL) << std::endl;
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return result;
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}
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