Load and save text file???

Question

hi,i've this program works as far as i know.what i need to do now is load the file when the program starts and saves any updates made when i exit the program to the text file called "PublicationList.txt" how can i do this?i dont know where to start.if someone can show me the code to put in so it works that would be what i need please.thanks alot if you can help.
The text file look contains the information as so:
PubID 1 Pubname Times Pubtype National Pub UM Status A PPR 50
PubID 2 Pubname Guardian Pubtype National Pub UM Status A PPR 60
PubID 3 Pubname Sun Pubtype National Pub UM Status A PPR 30
public class publication
public int PublicationID;
public String publicationname;
public String publisher;
public String PricePerIssue;
public String pubstatus;
public String publicationtype;
public publication(int NewPublicationID, String Newpublicationname, String Newpublisher, String NewPricePerIssue, String Newpubstatus, String Newpublicationtype)
PublicationID = NewPublicationID;
publicationname = Newpublicationname;
publisher = Newpublisher;
PricePerIssue = NewPricePerIssue;
pubstatus = Newpubstatus;
publicationtype = Newpublicationtype;
public String toString ()
String pubreport = "---------------------------Publication-Information-----------------------------\n\n";
pubreport += "Publication ID:" PublicationID" Publication Title: " publicationname"\n";
pubreport += " publisher: " publisher " price Per Issue: " PricePerIssue"\n";
pubreport += " publication Status: " pubstatus " publication Type: " publicationtype"\n";
return pubreport;
public void SetPublicationID(int PubID)
PublicationID = PubID;
public int GetPublicationID()
return PublicationID;
public void Setpublicationname(String pubname)
publicationname = pubname;
public String Getpublicationname()
return publicationname;
public void Setpublisher(String Pub)
publisher = Pub;
public String Getpublisher()
return publisher;
public void SetPricePerIssue(String PPI)
PricePerIssue = PPI;
public String GetPricePerIssue()
return PricePerIssue;
public void Setpubstatus(String Status)
pubstatus = Status;
public String Getpubstatus()
return pubstatus;
public void Setpublicationtype(String Pubtype)
publicationtype = Pubtype;
public String Getpublicationtype()
return publicationtype;
import java.util.*;
import publication;
public class PublicationContainer
LinkedList PubList;
public PublicationContainer()
PubList = new LinkedList();
public int add (publication newpublication)
PubList.addLast(newpublication);
return PubList.size();
private class PubNode
public publication pubrecord;
public PubNode next;
public PubNode (publication thepublicationrecord)
publication p = thepublicationrecord;
next = null;
public String toString()
return PubList.toString();
public void remove(int PubID)
PubList.remove(PubID);
public publication get(int PubID)
return (publication)PubList.get(PubID);
public void set(int PubID,publication newpublication)
PubList.set(PubID, newpublication);
import cs1.Keyboard;
import publication;
import java.util.*;
public class publicationmain
public static void main(String args[])
PublicationContainer pubdatabase = new PublicationContainer();
int userchoice;
boolean flag = false;
while (flag == false)
System.out.println("------------------------------------Publications--------------------------------");
System.out.println();
System.out.println("please Make a Selection");
System.out.println();
System.out.println("1 to add publication");
System.out.println("2 to delete publication");
System.out.println("0 to quit");
System.out.println("3 to View all publications");
System.out.println("4 to Edit a publication");
System.out.println();
userchoice = Keyboard.readInt();
switch (userchoice)
case 1:
String PubName;
String PricePerIssue;
String Publisher;
String Pubstatus;
String Pubtype;
int PubID;
System.out.println ("Enter Publication ID:");
PubID = Keyboard.readInt();
System.out.println("Enter Publication Name:");
PubName = Keyboard.readString();
System.out.println("Enter Publisher Name");
Publisher = Keyboard.readString();
System.out.println("Enter Price per Issue:");
PricePerIssue = Keyboard.readString();
System.out.println("Enter Publication status");
Pubstatus = Keyboard.readString();
System.out.println("Enter Publication type:");
Pubtype = Keyboard.readString();
pubdatabase.add (new publication(PubID, PubName, Publisher, PricePerIssue, Pubstatus, Pubtype));
break;
case 0:
flag = true;
case 2:
System.out.println ("Enter Publication ID:");
PubID = Keyboard.readInt();
pubdatabase.remove (PubID);
System.out.println ("publication: "+(PubID)+" removed");
System.out.println();
break;
case 3:
System.out.println (pubdatabase);
break;
case 4:
System.out.println ("Enter Publication to be edited by Publication ID: ");
PubID = Keyboard.readInt();
pubdatabase.remove (PubID);
String PubName1;
String PricePerIssue1;
String Publisher1;
String Pubstatus1;
String Pubtype1;
int PubID1;
System.out.println ("Enter Publication ID:");
PubID1 = Keyboard.readInt();
System.out.println("Enter Publication Name:");
PubName1 = Keyboard.readString();
System.out.println("Enter Publisher Name");
Publisher1 = Keyboard.readString();
System.out.println("Enter Price per Issue:");
PricePerIssue1 = Keyboard.readString();
System.out.println("Enter Publication status");
Pubstatus1 = Keyboard.readString();
System.out.println("Enter Publication type:");
Pubtype1 = Keyboard.readString();
pubdatabase.add (new publication(PubID1, PubName1, Publisher1, PricePerIssue1, Pubstatus1, Pubtype1))
break;
default:
System.out.println("Incorrect Entry");
}

Answer 1

public void readFile()
     BufferedReader br = new BufferedReader( new FileReader("PublicationList.txt") );
     String row;
     while( (row = br.readLine() ) != null)
          StringTokenizer st = new StringTokenizer(row," ");
          String temp = st.nextToken();
          String pubid = st.nextToken();
          temp = st.nextToken();
          String pubname = st.nextToken();
          temp = st.nextToken();
          String pubtype = st.nextToken();
          temp = st.nextToken();
          String pub = st.nextToken();
          temp = st.nextToken();
          String status = st.nextToken();
          temp = st.nextToken();
          String ppr = st.nextToken();
          // now you have in the Strings the values you needed
          // so what you want to do now
     } // read next line
     br.close();
}try the writing on your own.
tobias