自定义C++ java对象，从C++代码中设置二维字符串和浮点向量

我需要在自定义对象中向java代码传递回调。这是我的自定义类，我想用C++代码编写。

public class Result {   
    private String utterance[][];
    private float confidence[][];

    public String[][] getUtterance() {
        return utterance;
    }   
    public float[][] getConfidence() {
        return confidence;
    }   
    public void setUtterance(String utterance[][]) {
        this.utterance = utterance;
    }   
    public void setConfidence(float confidence[][]) {
        this.confidence = confidence;
    }   
}

类识别器与JNI进行通信。于是，她收到了回电

public class Recognizer {   

    private Result result;

    Recognizer(){
        System.load(LibNameLoader.libRoot(jarLibPath);
    }
    ...
    private void newResultCallback(Result result){//C++ send this object to java
        this.result = result;
    }
}

<>这是我的C++代码，它是我的C++对象，在java中也是一样。记住这是回拨，我不能更改签名

void Recognized(RecoResult *result){
    //class package
    jclass cls = env->FindClass("Lbr/ufpa/laps/jlapsapi/recognizer/Result;");

    jobject theObject; //i don't how to manipulate this one and set it arrays

    int row = result->sentenceNumber; //Vertical array lenght
    int column = result->wordsNumber; //Horizontal array lenght
    string *ptrUtterance = result->getUtterancePtr(); //simple acess ptrUtterance[i][j]
    float *ptrConfidence = result->getConfidencePtr(); //  "     "  ptrconfidence[i][j]
    jstring utteranceArray[row][column];
    jfloat floatArray[row][column];

    env->CallVoidMethod(obj_, midU, theObject);
    //obj_ is global and has the reference to java Recognizer  class
    //midU is the reference to java method called
    //theObject is the object that java will receive
}

我只需要帮助设置对象内部的数组字段。或者我可以使用以下方法发送jstring和jfloat数组env->CallVoidMethodobj_2;，midU1，jstringArray；和env->CallVoidMethodobj_2;、midU2、jfloatArray

谢谢你的帮助

编辑

识别器是这样的，我首先尝试使用一维数组 ... jclass testecls； jmethodide testemtdide； jobject testeobj； jstring-testestr； jobjectArray； int i

cout << "Rec cls"<< endl;
testecls = env->FindClass("Ljava/lang/String;");
if(testecls==NULL)
    cout << "Rec cls = NULL"<< endl;

cout << "Rec mtdid"<< endl;
testemtdid = env->GetMethodID(testecls,"<init>","(Ljava/lang/String;)V");
if(testemtdid==NULL)
    cout << "Rec mtdid = NULL"<< endl;

cout << "Rec obj"<< endl;
testeobj = env->NewObject(testecls, NULL);
if(testeobj==NULL)
    cout << "Rec obj = NULL"<< endl;

cout << "Rec str"<< endl;
testestr = env->NewStringUTF(result->getUtterance().c_str());
if(testestr==NULL)
    cout << "Rec str = NULL"<< endl;

cout << "Rec array"<< endl;
testearray = env->NewObjectArray(result->wordsNumber, testecls, testeobj);
if(testearray==NULL)
    cout << "Rec array = NULL"<< endl;


for(i=0;i<result->wordsNumber;i++){
    cout << "Rec setarray"<< endl;
    env->SetObjectArrayElement(testearray, i, testestr);
}

    cout << "Rec before call"<< endl;
env->CallVoidMethod(obj_, midUArray, testearray);
cout << "Rec after call"<< endl;

---

您有什么建议？

您需要调用Result的构造函数，然后操作该构造函数的字段

要调用并创建结果的新实例，必须按如下方式调用构造函数：

jclass resultClass = env->FindClass("Lbr/ufpa/laps/jlapsapi/recognizer/Result");
jmethodID cid = env->GetMethodID(resultClass, "<init>", "()V");
jobject theObject = env->NewObject(resultClass, cid);

---

然后，您可以将strArrArr传递给SetuthEssentialing[].

您需要调用Result的构造函数，然后操作该构造函数的字段

要调用并创建结果的新实例，必须按如下方式调用构造函数：

jclass resultClass = env->FindClass("Lbr/ufpa/laps/jlapsapi/recognizer/Result");
jmethodID cid = env->GetMethodID(resultClass, "<init>", "()V");
jobject theObject = env->NewObject(resultClass, cid);

---

然后，您可以将strArrArr传递给SetutterSequenting[][]。

您是遇到编译时错误还是运行时错误？如果是这样，请发布它。我编辑过，我正在使用最后的代码来测试您是否遇到编译时或运行时错误？如果是，请发布它。我编辑了，我正在使用最后的代码进行测试

jclass strArrArrCls = env->FindClass("[[Ljava/lang/String;");
jclass strArrCls = env->FindClass("[Ljava/lang/String;");
jobjectArray strArrArr = env->NewObjectArray(row, strArrArrCls, NULL);
for(i = 0; i < row; i++) {
    jobjectArray strArr = env->NewObjectArray(column);
    jfloat tmp[3];
    for(j = 0; j < colummn; j++) {
        jstring tmp = env->NewStringUTF(ptrUtterance[row][column].c_str());
        env->SetObjectArrayElement(strArr, j, tmp);
    }
    env->SetObjectArrayElement(strArrArr, i, strArr);
    env->DeleteLocalRef(strArr);
}