Help me in readObject

Question

Hi everyone,
I am facing a problem while reading from file using readObject. .
I have a function add() which writes objects to a file. If i display objects after a single call to add the objects gets displayed properly. But if i call add() again and display() only the previous values gets displayed.
But everything gets added to the file properly. I'm using sequential files
Pls reply me immediately.
Thanks in advance,
Vinoth

Answer 1

Hi
this is the code
import java.io.*;
import java.util.*;
public class SerializeFiles implements Serializable
     static BufferedReader console;
     ObjectOutputStream output;
     ObjectInputStream input;
     FileInputStream inputfile;
     FileOutputStream outputfile;
     public SerializeFiles()
     public void openFile()
          try // open file
               //output = new ObjectOutputStream( new FileOutputStream( "record11.ser" ,true) );
               //outputfile = new FileOutputStream("record13.ser",true);
               output = new ObjectOutputStream(outputfile);
          catch ( IOException ioException )
               System.err.println( "Error opening file." );
          } // end catch
     } // end method openFile
     public void openFile1()
     try // open file
               //input = new ObjectInputStream(new FileInputStream( "record11.ser" ));
               //inputfile = new FileInputStream( "record13.ser" );
               input = new ObjectInputStream(inputfile);
          }     // end try
          catch ( IOException ioException )
               System.err.println( "Error opening file." );
               } // end catch
     public void addRecords()throws IOException
          try
          Records record;
          String name,address,email;
          int phone;
          outputfile = new FileOutputStream("record12.ser",true);
          if(output==null)
               openFile();
          console = new BufferedReader(new InputStreamReader(System.in));
          System.out.println("Enter the number of records to be inserted :");
          int n=Integer.parseInt(console.readLine());
          String read=null,str=null;
          while(n>0)
               System.out.println("Enter the name :");
               name=console.readLine();
               System.out.println("Enter the address :");
               address=console.readLine();
               System.out.println("Enter the phone number :");
               phone=Integer.parseInt(console.readLine());
               System.out.println("Enter the mail id :");
               email=console.readLine();
               record=new Records(name,address,phone,email);
               output.writeObject(record);
               n--;
          output.flush();
          catch(Exception e)
          finally
               //output.close();
               //outputfile.close();
     public void viewRecords()throws IOException,ClassNotFoundException
          try
          Records record;
          System.out.println("Inside view");
          inputfile = new FileInputStream( "record12.ser" );
          //if(input==null)
               //System.out.println("inside input....");
          openFile1();
          while(true)
          {     System.out.println("Inside view hh ");
               record = (Records) input.readObject();
               System.out.println("Inside view nnh");
               System.out.println("Records :: "+record.getName()+" "+record.getAddress()+" "
                         record.getPhone()" "+record.getEmail());
          catch(Exception e)
               System.out.println(e);
          finally
               input.close();
               inputfile.close();
     public static void main(String args[])throws IOException,ClassNotFoundException
          SerializeFiles sf=new SerializeFiles();
          console = new BufferedReader(new InputStreamReader(System.in));
          //sf.openFile();
          String choice;
          do
          System.out.println("CHOICE: 1.ADD 2.DISPLAY 3.DELETE 4.MODIFY 5.EXIT");
          System.out.println("Enter your choice of operation :");
          int n= Integer.parseInt(console.readLine());
          switch(n)
          case 1:
               sf.addRecords();
                    break;
          case 2:
               // sf.openFile1();
               sf.viewRecords();
                    break;
          /*case 3:
               fw.delete();
                    fw.refresh();
                    break;
          case 4:
               fw.modify();
                    fw.refresh();
                    break;*/
          case 5:
               System.exit(0);
          System.out.println("Do you want to continue(y/n):");
          choice=console.readLine();
          }while(choice.equals("y"));
Plz help me