problem calling a Java Method from C++
hi everyone,
i'm using JNI and i'm trying to call a Java method from C++, this is the code:
SocketC.java
public class SocketC
{
private native void conectaServidor();
private void recibeBuffer()
{
System.out.println("HELLO!!!");
}
public static void main(String args[])
{
SocketC SC = new SocketC();
SC.conectaServidor();
}
static {
System.loadLibrary("Server_TCP");
}
}
Server_TCP.cpp
char* recibirSock()
{
int _flag = 1;
while(_flag != 0)
{
memset(buffer,0,sizeof(buffer));//Et la, celle pour recevoir
recv(sock,buffer,sizeof(buffer),0);
printf(" Mensaje del cliente: %s\n",buffer);
_flag = strcmp(buffer,"salir");
}//fin while
return buffer;
}
void enviarSock()
{
int _flag = 1;
getchar();
while(_flag != 0)
{
memset(buffer,0,sizeof(buffer));//procedimiento para enviar
printf("\n Escriba: ");
gets(buffer);
//err=scanf("%s",buffer);
send(sock,buffer,sizeof(buffer),0);
_flag = strcmp(buffer,"salir");
}//fin while
}//fin enviarSock
DWORD servicio(LPVOID lpvoid)//
{
char *buf;
printf("\nCliente aceptado!!!!!\n");
buf=recibirSock();
return 0;
}
JNIEXPORT void JNICALL Java_SocketC_conectaServidor(JNIEnv *env, jobject obj)
//void main()
{
/*this is the problem i'm calling the method recibeBuffer*/
jclass cls = env->GetObjectClass(obj);
jmethodID mmid = env->GetMethodID(cls, "recibeBuffer", "(V)V");
if (mmid == 0)
return;
env->CallVoidMethod(obj, mmid); //llama a Java
WSAStartup(MAKEWORD(2,0),&wsa);//MAKEWORD dit qu'on utilise la version 2 de winsock
printf("TCP conexion Sockets\n\n");
//estimez vous heureux que je foute pas de copyright ;)
system("TITLE TCP Conexion Sockets (Version server)");
//fo avouer que c'est plus joli
int port;
printf("Port : ");//On demande juste le port, pas besoin d'ip on est sur un server
scanf("%i",&port);
sinserv.sin_family=AF_INET;//Je ne connais pas d'autres familles
sinserv.sin_addr.s_addr=INADDR_ANY;//Pas besoin d'ip pour le server
sinserv.sin_port=htons(port);
server=socket(AF_INET,SOCK_STREAM,0);//On construit le server
//SOCK_STREAM pour le TCP
bind(server,(SOCKADDR*)&sinserv,sizeof(sinserv));
//On lie les parametres du socket avec le socket lui meme
listen(server,SOMAXCONN);//On se met ?閏outer avec server, 0 pour n'accepter qu'une seule connection
printf(" Servidor conectado.");
while(1)
{
sinsize=sizeof(sin);
if((sock=accept(server,(SOCKADDR*)&sin,&sinsize))!=INVALID_SOCKET)
{//accept : acepta cualquier conexion
if (hReadThread = CreateThread (NULL, 0, (LPTHREAD_START_ROUTINE)
servicio, 0, 0, &dwThreadID))
{
printf("\nHOLA!");
GetExitCodeThread(hReadThread,&dwExitCode);
CloseHandle (hReadThread);
}
else
{
// Could not create the read thread.
printf("No se pudo crear");
exit(0);
}
}
}
}
when i'm running the proyect i get this error:
C:\POT Files\UCAB\tesis\esmart\french>java SocketC
Exception in thread "main" java.lang.NoSuchMethodError: recibeBuffer
at SocketC.conectaServidor(Native Method)
at SocketC.main(SocketC.java:16)
i don't know why this is happening i got declare the method recibeBuffer in my SocketC.java class, but doesn;t work can anyone help me?
PD: sorry for my bad english i'm from Venezuela
