Java network with server-client in single model -

i want create network 3 nodes communicate each other. in more detail i'm trying to:

• create server-client model single project copy project in 2 more , there have 3 nodes
• by changing ports ofcourse can make them communicate if split projects in different computers
• after want 1 project send time (with made-up time lag) other 2 nodes , vice-verca other 2 nodes, , find average time.
• i dont want create single servers , single clients, want use threads make unified server-client runs simple "run".

the problems i'm having node starts first finishes first , rest nodes left hanging , in endless loop. , other that i'm stuck no idea do.

so far have made this:

server:

public class server implements runnable{     private int port;     private string name;      public server(int port, string name){         this.port=port;         this.name=name;     }     public synchronized void run(){         while(true){         try{              thread.sleep(5000);              method();          }         catch(exception e){             return;         }          }     }      public synchronized void method() throws exception{         double sum=0;         double average=0;         double[] values = new double[10];       serversocket server = new serversocket(port);        socket s=server.accept();        inputstream in= s.getinputstream();       outputstream out = s.getoutputstream();        printwriter w = new printwriter(out);       scanner r = new scanner(in);       for(int i=0; i<10; i++){       string msg = r.next();       sum = double.parsedouble(msg);       values[i] = sum;      }       for(int j=0; j<values.length; j++){           average = average + values[j];       }       system.out.println(name+": "+average/10); } } 

client:

public class client implements runnable{     private int port;     private int id;     public client(int port,int id){         this.port=port;         this.id = id;     }      public synchronized void run(){          try{             thread.sleep(5000);              method();          }         catch(exception e){             return;         }      }      public synchronized void method() throws exception{         int num=0;         random ran = new random(10);         int d = 0;         socket s = new socket("localhost", port);          inputstream in= s.getinputstream();         outputstream out = s.getoutputstream();          printwriter w = new printwriter(out);         scanner r = new scanner(in);         for(int i=0; i<10; i++){         d = ran.nextint(10);         system.out.println("client "+id+" sent "+d);         w.println(d);         w.flush();         }       } } 

and run them this:

public class networks {       public static void main(string[] args) {         server s = new server(5000, "server 0");         server s2 = new server(5001, "server 1");         client c = new client(5002, 11);         client c2 = new client(5004, 22);          thread t1 = new thread(s);         thread t2 = new thread(c);         thread t3 = new thread(c2);         thread t4 = new thread(s2);          t1.start();         t2.start();         t3.start();         t4.start();          try{             t1.join();             t2.join();             t3.join();             t4.join();         }         catch(exception e){             system.out.println("something");         }      } } 

you may ignore ports , stuff since have created same project 2 more times testing. method() method testing , results when run 3 projects output first project's clients send nothing , results both servers, second's clients works 1 , 1 server result , @ third project clients send servers return nothing. when output done first project completes , ends , other 2 run ever.

maybe:

1. you're swallowing exceptions in client.
2. you're starting 4 threads @ same time.
3. there race condition client can start , try send on socket before server listening/accepting
4. when server come up, client has errored out , server waits forever.

this theory, looks it's case.