Getting null and 0 outputting to screen or file.

Question

Hi everyone,
I am trying to make a phone book program in Java. However the main functions of the phone book (adding and displaying contacts) isn't really working, it is outputting null or 0.
Here is a class to create an object for family members:
import java.util.StringTokenizer;
public class phoneFamily extends phoneNumbers
     protected int home;
     public phoneFamily(String name, String address, int mobile, int business, int home)
          super(name, address, mobile, business);
          this.home = home;
     public phoneFamily(StringTokenizer P)
          super(P);
          while (P.hasMoreTokens()){home = Integer.parseInt(P.nextToken());}
     public void setHome(int home)
          this.home = home;
     public int getHome()
          return home;
     public String toString()
          return "Name: " + name + "\nAddress: " + address + "\nMobile: " + mobile +
               "\nBusiness: " + business + "\nHome: " + home;
     public String CSV()
          return name + "," + address + "," + mobile + "," + business + "," + home;
}Now I'm assuming that the problem I am having, where null or 0 is written to the file and screen is caused by the methods that reads a contact, writes them to the file, prints them to the screen. Here are those bits of codes.
Reads Contact:
private phoneNumbers ReadContact()
          int x = 0;
          String contact;
          StringTokenizer S;
          while (x < 1 || x > 3)
               System.out.print("Which type of contact would you like?");
               System.out.print("\n1)Family\n2)Workers\n3)Friends");
               x = keyboard.nextInt();
          contact = ReadString("contact name") + "," +
                     ReadString("address") + "," +
                     ReadString("mobile") + "," +
                     ReadString("business") + ",";
          if (x==1)
               contact+=ReadString("home");
          else if (x==2)
               contact+=ReadString("email") + "," + ReadString("job title") + "," + ReadString("department");
          else
               contact+=ReadString("email") + "," + ReadString("home");
          S = new StringTokenizer(contact,",");
          if (x==1)
               return new phoneFamily(S);
          else if (x==2)
               return new phoneWorkers(S);
          else
               return new phoneFriends(S);
Writes to File
public void Save() throws IOException
          PrintWriter phoneFile = new PrintWriter(new FileOutputStream(PH_FILE));
          for (int i=0;i<NumOfContacts;i++)
               String phoneX = phone.CSV();
               phoneFile.println(phoneX);
          phoneFile.close();
          System.out.println("Contacts have been saved successfully.");
Prints on Screen
public void PrintFamily()
          System.out.println("Contacts Stored as FAMILY:");
          System.out.println("");
          //#=7, Name=24, Address=28, Email=24, Mobile=12, Business=12,
          System.out.println(SpaceGen("#",7) + SpaceGen("Name",24) + SpaceGen("Address",28) +
               SpaceGen("Mobile",12) + SpaceGen("Business",12) + SpaceGen("Home",12));
          //System.out.println(RepChar('=',100));
          for (int i=0;i<NumOfContacts;i++)
               if (phone[i] instanceof phoneFamily)
                    System.out.print(SpaceGen((new Integer(i+1)).toString(),7));
                    System.out.print(SpaceGen(phone.getName(),24));
                    System.out.print(SpaceGen(phone[i].getAddress(),28));
                    System.out.print(SpaceGen(new Integer(((phoneFamily)phone[i]).getMobile()).toString(),12));
                    System.out.print(SpaceGen(new Integer(((phoneFamily)phone[i]).getBusiness()).toString(),12));
                    System.out.print(SpaceGen(new Integer(((phoneFamily)phone[i]).getHome()).toString(),12));
          //System.out.println(RepChar('=',100));
For some reason the last thing you enter when adding a contact (example above, home number), gets displayed first (when it should be name) and the rest are null or 0. The file looks something like this (in CSV)
111222333,null,0,0,0
The "111222333" is supposed to be the name but like I said last value entered is being put first.
I've gone over my code several times, with no luck :-(.

Answer 1

I made a silly mistake in the bit where the details are read. After fixing that everything is running well :-).
My mistake:
I had something like:
while(P.hasMoreTokens()){this.data = P.nextToken();}
while(P.hasMoreTokens()){this.data2 = P.nextToken();}
and so on...Obviously had to use "if"s and not "while"s to read the data...
Thanks for offering a helping hand :-) though!