Throwing Exception having multiple arguments in constructor

Question

hi,
I am trying to implement exception handling for a JAVA + C++ module.
In which C++ exception is caught by a Java module.
The c++ code is as follows,
try
///////////===========
} catch (Exception1 &e) {
jclass clazz = jenv->FindClass("test/Exception1Java");
if(clazz)
jenv->ThrowNew(clazz,e.getErrMsg().c_str());
return 0;
} catch (Exception2 &e) {
jclass clazz = jenv->FindClass("test/Exception2");
if(clazz)
jenv->ThrowNew(clazz,e.getErrMsg().c_str());
return 0;
This works perfectly fine.
But I want to pass one more argument as int while throwing the java exception.
jenv->ThrowNew(clazz,e.getErrId(),e.getErrMsg().c_str());
As the jenv->ThrowNew function only take two arguments I am unable to send the error id( int ) to the message.
Is there any alternate to this function or some other approach to throw the java exceptions.

Answer 1

hi,
I am trying to implement exception handling for a
JAVA + C++ module.
In which C++ exception is caught by a Java module.
The c++ code is as follows,<snip>
>
But I want to pass one more argument as int while
throwing the java exception.
env->ThrowNew(clazz,e.getErrId(),e.getErrMsg().c_str());>
As the jenv->ThrowNew function only take two
arguments I am unable to send the error id( int ) to
the message.
Is there any alternate to this function or some other
approach to throw the java exceptions.Build the exception using the normal FindClass, GetMethodID approach,. and then throw it.
#include "NativeExceptionTest.h"
JNIEXPORT void JNICALL Java_NativeExceptionTest_test
(JNIEnv *env, jobject obj, jint data) {
     if (data == 42) {
          jclass excClass = env->FindClass("MyException");
          if (!excClass) {
               return;
          jmethodID ctorID = env->GetMethodID(excClass, "<init>", "(ILjava/lang/String;)V");
          if (!ctorID) {
               return;
          jstring excMessage = env->NewStringUTF("ILLEGAL VALUE");
          jobject excObject = env->NewObject(excClass, ctorID,-1,excMessage);
          if (!excObject) {
               return;
          env->Throw((jthrowable)excObject);
     return;
}============================================
public class NativeExceptionTest {
     static {
          System.loadLibrary("nativeException");
     NativeExceptionTest() {
           try {
                test(42);
           } catch (MyException e) {
               System.out.println("Exception: " + e.getCode() + "(" + e.getMessage() +")");
     private native void test(int i) throws MyException;
     public static void main(String[] args) {
          new NativeExceptionTest();
class MyException extends Exception {
     private int code;
     MyException(int code, String message) {
          super(message);
          this.code = code;
     int getCode() {
          return this.code;
}