creating concurrent server using separate threads??

here is my code but how do i execute that does anyone know?

import java.io.*;
import java.net.*;
import java.util.*;
public class Second {
  public static void main(String args[]) throws Exception {
    System.setProperty( "java.net.preferIPv4Stack", "true" );
    int port = Integer.parseInt(args[0]);
    ServerSocket serverSock=new ServerSocket(port);
 while(true) {
      Socket conn = serverSock.accept();
      Scanner scan = new Scanner(conn.getInputStream());
      String line=null;
      int nlines=0;
      String filebytes[] = new String[32];
      String reply2 ="HTTP/1.0 200 OK\r\n" +
                     "Connection: close\r\n" +
                     "Content-Type: text/html\r\n" +
                     "\r\n" ;
      String reply  ="HTTP/1.0 404 Not Found\r\n" +
                   "Connection: close\r\n" +
                   "Content-Type: text/html\r\n" +
                   "\r\n" +
                   "<h1>repair in progress</h1>\r\n";
      OutputStream outs = conn.getOutputStream();
      byte buffer[] = new byte[128];
      while (true) {
        line = scan.nextLine();
        if(line.length()==0) break;
        filebytes[nlines] = line;
        nlines = nlines + 1;
        }
      for(int lineCount = 0; lineCount < nlines; lineCount++)
      {    System.out.println(filebytes[lineCount]);}

String t = filebytes[0];
      Scanner scans = new Scanner(t);
      String command=scans.next();
      String resource = "website" + scans.next();
      String fileName = resource;
      System.out.println(fileName);

File resfile = new File(fileName);
      if(!resfile.exists())
      {outs.write(reply.getBytes());}
      else
      {InputStream ins = new FileInputStream(resfile);
outs.write(reply2.getBytes());
       while(true)
          {int rc = ins.read(buffer, 0, 1024);
    if(rc <= 0)break;
    outs.write(buffer, 0, rc);}
      } conn.close();
    }
  }
}

Not sure I follow, are you asking us how to run your own code? The normal route would be to call your class by running java. Or is there more to your question?

sorry i need to know how to. create a cooncurrent server using separate threas for each processing each client request??

sorry bad spelling!! LOL
i need to know how to create a concurrent server using separate threads for each processing each client request??

ok ok i have got a bit further i think i have created a concurrent server.. can someone tell me if this is correct.. my next tasks are :

2. It will use a log file to record all transactions. The program
should append to the file and not recreate it if it already exists
(use the Java API documentation to discover how). There
should only be one line per transaction. You should decide what
information is most relevant, however it should include the current
data and time and the client’s IP address (use getInetAddress()).
You can always look at Apache log files to see what
they contain.

3. It will check the resource name (from the first line of the client
request) to see that it starts with a “/” and if not it will return a
400 response.

4. It will correctly deal with HTTP requests GET and HEAD, if
correct, but will return a 501 response if the request is not either
HEAD or GET.

5. It deals the HEAD requests correctly, read RFC2616 (the standard
for HTTP/1.1).

6. The server should always send a:
Connection: close
option line with every response...

does anyone know how to do these?? heres my code

thanks in advance

import java.io.*;
import java.net.*;
import java.util.*;

class ServiceThread extends Thread {
  Socket conn=null;
  
  public ServiceThread(Socket c) { conn = c; }

public void run() {
    final int buffben=100;
    byte buff[] = new byte[buffben];
    try {
      OutputStream out = conn.getOutputStream();
      InputStream in = conn.getInputStream();

while(true)
          {int rc = in.read(buff, 0, buffben);
              if(rc <= 0)break;
              out.write(buff, 0, buffben);
            }
      out.close(); conn.close();
    } catch (IOException e) {
      System.err.println("EchoServer: error reading socket");
      System.exit(1);
    }
  }
}

public class Second{
     public static void main(String args[]) throws Exception {
         System.setProperty( "java.net.preferIPv4Stack", "true" );
         int port = Integer.parseInt(args[0]);
         ServerSocket serverSock=new ServerSocket(port);
         byte buffer[] = new byte[128];
    while(true) {
         Socket conn = serverSock.accept();
         Scanner scan = new Scanner(conn.getInputStream());
         OutputStream outs = conn.getOutputStream();
         String line=null;
         int nlines=0;
         String filebytes[] = new String[32];
         String reply2 ="HTTP/1.0 200 OK\r\n" +
                     "Connection: close\r\n" +
                     "Content-Type: text/html\r\n" +
                     "\r\n" ;
         String reply  ="HTTP/1.0 404 Not Found\r\n" +
                   "Connection: close\r\n" +
                   "Content-Type: text/html\r\n" +
                   "\r\n" +
                   "<h1>repair in progress</h1>\r\n";

while (true) {
             line = scan.nextLine();
             if(line.length()==0) break;
             filebytes[nlines] = line;
             nlines = nlines + 1;
            }
      for(int lineCount = 0; lineCount < nlines; lineCount++)
      {    System.out.println(filebytes[lineCount]);}

String t = filebytes[1024];
      Scanner scans = new Scanner(t);
      String command=scans.next();
      String resource = "website" + scans.next();
      String fileName = resource;
      System.out.println(fileName);

File resfile = new File(fileName);
      if(!resfile.exists())
      {outs.write(reply.getBytes());}
      else
      {InputStream ins = new FileInputStream(resfile);
          outs.write(reply2.getBytes());
       while(true)
          {int rc = ins.read(buffer, 0, 100);
              if(rc <= 0)break;
              outs.write(buffer, 0, rc);}
      } outs.close();  conn.close();
    }
  }
}