networking - Communicating through two separate computer using java sockets -

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i trying make chat server , client can communicate on 2 separate computers connected internet. 1 of them connected wifi , 1 through modem. here server code.

greetingserver.java

import java.net.*; import java.io.*;  public class greetingserver extends thread {    private serversocket serversocket;     public greetingserver(int port) throws ioexception    {       serversocket = new serversocket(port);       serversocket.setsotimeout(100000);    }     public void run()    {       while(true)       {          try          {             system.out.println("waiting client on port " +             serversocket.getlocalport() + "...");             socket server = serversocket.accept();             system.out.println("just connected "                   + server.getremotesocketaddress());             datainputstream in =                   new datainputstream(server.getinputstream());             system.out.println(in.readutf());             dataoutputstream out =                  new dataoutputstream(server.getoutputstream());             out.writeutf("thank connecting "               + server.getlocalsocketaddress() + "\ngoodbye!");             server.close();          }catch(sockettimeoutexception s)          {             system.out.println("socket timed out!");             break;          }catch(ioexception e)          {             e.printstacktrace();             break;          }       }    }    public static void main(string [] args)    {       int port = integer.parseint("6066");       try       {          thread t = new greetingserver(port);          t.start();       }catch(ioexception e)       {          e.printstacktrace();       }    } }

greetingclient.java

import java.net.*; import java.io.*;  public class greetingclient2 {    public static void main(string [] args)    {       string servername = "10.2.3.100";       int port = integer.parseint("6066");       try       {          system.out.println("connecting " + servername +          " on port " + port);          socket client = new socket(servername, port);          system.out.println("just connected "           + client.getremotesocketaddress());          outputstream outtoserver = client.getoutputstream();          dataoutputstream out = new dataoutputstream(outtoserver);          out.writeutf("hello "                       + client.getlocalsocketaddress());          inputstream infromserver = client.getinputstream();          datainputstream in =                         new datainputstream(infromserver);          system.out.println("server says " + in.readutf());          client.close();       }catch(ioexception e)       {          e.printstacktrace();       }    } }

the ip address in client code of computer server running acquired inetaddress.getlocalhost().gethostaddress(). when run server, waits client. , when run client code computer, doesn't connect. possible communicate through sockets in java ?

yes, possible. server has have external ip.

also if server connected via wifi, check router firewall settings.


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