java - Wifi Socket address not valid,Android -

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whenever create serversocket , watch socket address calling getlocalsocketaddress(), see:

0.0.0.0/0.0.0.0:xxxxx( xxxx random port no)

my code server is:

try{     boolean end = false;     serversocket ss = new serversocket(0);     system.out.println("program running, server address:" + ss.getlocalsocketaddress().tostring());     while(!end){         //server waiting client here, if needed          socket s = ss.accept();         system.out.println("socket connected !");           bufferedreader input = new bufferedreader(new inputstreamreader(s.getinputstream()));         printwriter output = new printwriter(s.getoutputstream(),true); //autoflush         string st = input.readline();         system.out.println("tcp example client: "+st);         output.println("good bye , fish :)");         s.close();      }     ss.close();    } catch (exception ex) {      ex.printstacktrace();  }

dont assign "0" in serversocket

ports 0-65535 , 1 - 65534 used.. try use ports above 1024, used other known services, telnet, ftp, http, etc...

see code...it might execute code.....

the server side code example:

    public class servertest {          serversocket s;          public void go() {              try {                 s = new serversocket(4445);                  while (true) {                      socket incoming = s.accept();                     thread t = new thread(new mycon(incoming));                     t.start();                 }             } catch (ioexception e) {                  e.printstacktrace();             }          }          class mycon implements runnable {              socket incoming;              public mycon(socket incoming) {                  this.incoming = incoming;             }              @override             public void run() {                  try {                     printwriter pw = new printwriter(incoming.getoutputstream(),                             true);                     inputstreamreader isr = new inputstreamreader(                             incoming.getinputstream());                     bufferedreader br = new bufferedreader(isr);                     string inp = null;                      boolean isdone = true;                      system.out.println("type : bye");                     system.out.println();                     while (isdone && ((inp = br.readline()) != null)) {                          system.out.println(inp);                         if (inp.trim().equals("bye")) {                             system.out                                     .println("thanks connecting...bye now");                             isdone = false;                             s.close();                         }                      }                 } catch (ioexception e) {                     // todo auto-generated catch block                     try {                         s.close();                     } catch (ioexception e1) {                         // todo auto-generated catch block                         e1.printstacktrace();                     }                     e.printstacktrace();                 }              }          }          public static void main(string[] args) {              new servertest().go();          }  }

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