c++ - Access array from Java-side -


i have method in java class called set field of class. field of type "char []. try , access element of thechar []` program crash.

jni code:

mid = env->getmethodid(cls,"setdata","([c)v"); env->callvoidmethod(obj,mid,myclass.data)   //myclass.data: unsigned char data [8];

java code:

public void setdata(char[] data2) {    //data: char [] data = new char [8];     system.out.println("in method");   //"in method" printed console     //data = data2.clone();              //i know im calling method correctly     for(int = 0; < 8; i++){          data[i] = data2[i];} }

i have made work, changing signature of method:

//jni side mid = env->getmethodid(cls,"setdata","(cccccccc)v"); env->callvoidmethod(obj,mid,myclass.data[0],myclass.data[1],myclass.data[2],myclass.data[3],myclass.data[4],     myclass.data[5],myclass.data[6],myclass.data[7]);  //java side public void setdata(char c1,char c2,char c3,char c4,char c5,char c6,char c7,char c8) {     data[0] = c1;     data[1] = c2;     data[2] = c3;     data[3] = c4;     data[4] = c5;     data[5] = c6;     data[6] = c7;     data[7] = c8; }

how can use method array? later in program have bigger arrays fields , less messy use one.

a java char array not same thing c char array:

  • a char array in java object includes array length in addition data
  • a char in java 16 bits, typically twice size of char in c

the jni api has functions creating java arrays , setting elements: newchararray, getchararrayelements, , releasechararrayelements.


Comments

Post a Comment

Popular posts from this blog

curl - PHP fsockopen help required -

i trying work on cloudflare api , have found in documentation. unfortunately have no idea how can use in fsockopen or through curl. here example of post request. need know how can make request below data post using curl or fsockopen curl https://www.cloudflare.com/api_json.html -d 'a=cache_lvl' \ -d 'tkn=8afbe6dea02407989af4dd4c97bb6e25' \ -d 'email=sample@example.com' \ -d 'z=example.com' \ -d 'v=agg' here link cloudflare https://www.cloudflare.com/docs/client-api.html#s4.2 try one: $ch = curl_init("https://www.cloudflare.com/api_json.html"); curl_setopt($ch, curlopt_returntransfer,1); curl_setopt($ch, curlopt_followlocation, 1); curl_setopt($ch, curlopt_ssl_verifypeer,false); // handling of -d curl parameter here. $param = array( 'a' => 'cache_lvl', 'tkn' => '8afbe6dea02407989af4dd4c97bb6e25', 'email' => 'sample@example.com', 'z' =...
Read more

HTTP/1.0 407 Proxy Authentication Required PHP -

i working in restricted network/limited access internet. since have use proxy make web service call. here php code calling web service , response . $client = new soapclient("http: //www.xyz.com/abc/wsdls/login.wsdl", array("trace" => 1, "exceptions" => 1, 'proxy_host' => $proxy_host, 'proxy_port' => $proxy_port, 'proxy_login' => $proxy_login, 'proxy_password' => $proxy_password)); response is fatal error: uncaught soapfault exception: [wsdl] soap-error: parsing wsdl: couldn't load ' http://www.xyz.com/abc/wsdls/login.wsdl ' : failed load external entity if copy url error message , paste in browser(with same proxy settings) works. 2nd scenario is, if pass values instead of variables giving me diffarant response $client = new soapclient("http: //www.xyz.com/abc/wsdls/login.wsdl", array("trace" => 1, "exceptions" => 1, 'proxy_host' ...
Read more

c# - Resource not found error -

i have problem accessing method on homecontroller. show code of method : [httpget] public actionresult decriptidentifiantetredirige(string login_crypter, string mdp_crypter) { string loginacrypter = _globalmanager.protegemotdepasse(login_crypter); string mdpacrypter = _globalmanager.protegemotdepasse(mdp_crypter); user userapp = new models.user(login_crypter, mdp_crypter); if (userapp.authentificationvalidee(userapp.userlogin, userapp.password)) { session["name"] = userapp.userlogin; return redirecttoaction("accueil", "home"); } else { return redirecttoaction("validerauthentification", "home"); } } then in routeconfig.cs wrote route : routes.maproute( name: "authentificationapresdecryptage", url: "{controller}/{action}/{login_crypter}/{mdp_crypter}", defaults: new...
Read more