Need help moving to OO

Question

My program worked fine while it was all in one file. But every java program I download breaks every process down into small pieces. So I've attempted that with my program. But, when I compile, I get unresolved symbols pointing to the two classes I broke off the main class.
Taken from Wire.java which only has a main method:
Socket s = WireSetup.connectServ(host, port);
          if (s == null)
               System.out.println("The socket could not be opened.");
          WireConnect.servComm(s);
Here are my other class files:
WireConnect.java:
package wired;
import java.io.*;
import java.net.*;
class WireConnect
     InputStreamReader isr = null;
BufferedReader in = null;
PrintWriter out = null;
     StringBuffer str = null;
     public void servComm(Socket socket)
try
          isr = new InputStreamReader(socket.getInputStream());
in = new BufferedReader(isr);
out = new PrintWriter(socket.getOutputStream(),true);
          BufferedReader userIn = new BufferedReader(new InputStreamReader(System.in));
          String fromUser;
          String fromServer;
          loop1:
          while ((fromServer = in.readLine()) != "_done_")
          System.out.println(fromServer);
if (fromServer.equals("_done_"))
fromUser = userIn.readLine();
out.println(fromUser);
if (fromUser.equalsIgnoreCase("exit"))
out.print("exit");
in.close();
out.close();
break;
else out.flush();
     catch (IOException e)
          System.err.println("I/O error: " +e.toString());
WireSetup.java:
package wired;
import java.io.*;
import java.net.*;
class WireSetup
     public static Socket connectServ(String aHost, int aPort)
     WireSetup wiresetup = new WireSetup(aHost, aPort);
     wiresetup.openSocket();
     return wiresetup.getSocket();
     public WireSetup(String aHost, int aPort)
     socket = null;
     host = aHost;
     port = aPort;
     System.out.println(".........");
     public void openSocket()
     try
     socket = new Socket(host, port);
     System.out.print("Socket connection created to " +host);
     System.out.println(":" +port);
     catch (IOException exception)
          System.out.println("I/0 Exception");
     public Socket getSocket()
          return socket;
     private String host;
     private int port;
     private Socket socket;
}

Answer 1

Packages are java's way of avoiding Namespace conflicts, for eg if two classes have the same name
letz say Wire, then you can differentiate then by using
com.test.electrical.wire and
com.test.wire;
in this case the former class will be in package com.test.electical and the latter will be in com.test.wire.
Packages also helps structuring the java files, for eg you could create a package structure like
com.test.api
com.test.client
com.test.server
you could put all common classes in com.test.api, client related classes in com.test.client etc.
If you dont have any package statement in your java code, then you need not import any of those java files.
for eg if you had two java files
a.java and foo.java
and in a.java and foo.java you dont have any package statement and both these files are in the same directory, then you can access foo.java from a.java withtout an import (vice versa),
in java any files placed without package statements and present in the same directory are considered to be part of one package.
As far as accessing these files if package statement is considered, first and foremost you must set the classpath to the class files and then
if you use fully qualified names you need not use import statments, else you will have to do an import.