Server concurrency?

package com.coal.core;

/**@author Adil */

/***
 * Credits and fanfares:
 * Myrax(Dominic) - :D
 * Mike (office.boy/Demilium) & Nillus (Nils) - Blunk (reference)
 */
/**@version 0.1 */

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.sql.SQLException;
import java.util.Properties;

import com.coal.net.*;
import com.coal.storage.*;
;/** Class where all our methods are called */
public class CoalEnvironment {
    public static Properties conf;
public static void config(){
Properties conf = new  Properties();
    try {
        //set the properties value
        conf.setProperty("url","http://localhost");
        conf.setProperty("database", "bittybay");
        conf.setProperty("dbuser", "root");
        conf.setProperty("dbpassword", "asd");

        //save properties to project root folder
        conf.store(new FileOutputStream("coal.properties"), null);
        //let's write now
    } catch (IOException ex) {
        ex.printStackTrace();
    }
}
public static void writeconf(){


}
    public static void main(String[] args) throws SQLException {
        System.out.println();
        System.out.println("#########################################");
        System.out.println("##  Coal:Simple Emulation Environment  ##");
        System.out.println("##     Copyright (C) 2011              ##");
        System.out.println("##      Adil                           ##");
        System.out.println("##      JokerCode.NET                  ##");
        System.out.println("#########################################");
        System.out.println("Initializing core objects...");
        socket.getIP();
        System.out.println("Connecting on port:" + socket.getsocket());
        socket.serversocket(socket.getsocket());
        System.out.println("Socket connection established!");
        System.out.println("Preparing to set up TCP environment....");
        socket.setTCP();
        Storage.jdbcheck();
        try {
            //load a properties file
        conf.load(new FileInputStream("coal.properties"));

            //get the property value and print it out
             System.out.println(conf.getProperty("database"));
        System.out.println(conf.getProperty("dbuser"));
        System.out.println(conf.getProperty("dbpassword"));

    } catch (IOException ex) {
        ex.printStackTrace();
     }
        Storage.bonecon();



    }}