Help:How to get a java String value from a C char array?

Question

Hi,everyone,could you help me?
the following is a C struct that i want to recieve a short message:
struct MO_msg{
unsigned long long msgID;          //Message ID
char      dest_id[21]; //Destination Mobile Phone Number
char      service_id[10];     //
Now I want to put the "dest_id " value of this struct into a Java String variable.But I dont know how to implement it!
The following is a block of source code that i implement this functions.But it cant get a String value ,and throw out a Exception:
java.lang.NullPointerException
at java.lang.StringBuffer.append(StringBuffer.java:389)
JNIEXPORT jint JNICALL Java_md_EMAP_thread_RubeMOTSSX_getMO
(JNIEnv * env, jobject obj, jint connId, jobject mo){
     struct MO_msg MO;
     tssx_cmpp_api_debug_flag = 1;
     int result = CMPP_Get_MO((int)connId,&MO);
     if (result == 0){
          jclass cls = (*env)->GetObjectClass(env,mo);
          jfieldID msgId = (*env)->GetFieldID(env,cls,"msgId","J");
          jfieldID dest_Id = (*env)->GetFieldID(env,cls,"dest_Id","Ljava/lang/String;");
          jfieldID serviceId = (*env)->GetFieldID(env,cls,"serviceId","Ljava/lang/String;");          
          (*env)->SetLongField(env,mo,msgId,MO.msgID);               
          (*env)->SetCharField(env,mo,dest_Id,*destId);
          (*env)->SetCharField(env,mo,serviceId,MO.service_id);
     return result;
Please help me!Thanks!

Answer 1

bschauwe:Thank you for your help!
Yes,just as you say,using NewString Or NewStringUTF can import a C char array into a Java String variable! But now I have another question,when i use these two functions ,i found that it cant deal with Chinese character!
do you have such experiences to deal with another language charset?if you have ,can you tell me how to deal with it.