Creating and Accessing Vector class

Question

I'm trying to read and transfer each line of a .txt file into a vector format. It seems like my information are being converted since vectPers.size() give me 21 which is the amount of people i have. The problem is that when i try to print the vector it keeps displaying these wierd lines which account for 21 people

Personne@15db9742
Personne@6d06d69c
Personne@7852e922
Personne@4e25154f
Personne@70dea4e
Personne@5c647e05
Personne@33909752
Personne@55f96302
Personne@3d4eac69
Personne@42a57993
Personne@75b84c92
Personne@6bc7c054
Personne@232204a1
Personne@4aa298b7
Personne@7d4991ad
Personne@28d93b30
Personne@1b6d3586
Personne@4554617c
Personne@74a14482
Personne@1540e19d
Personne@677327b6

This is my code so far:

import java.io.*;
import java.util.Vector;


class Personne
{
  private String nomPre ;
  private double taille, poids;
  private char sexe ;
  private int numero;

  public Personne( String nomPre, char sexe, double taille, double poids, int numero) {
      this.nomPre = nomPre ;
      this.sexe = sexe;
      this.taille = taille ;
      this.poids = poids;
      this.numero = numero;
  }


    public double getTaille() { return taille; }
    public double getPoids() {return poids; }
    public String getNomPre() { return nomPre; }
    public char getSexe() { return sexe ; }
    public int getNumero() { return numero; }

    public void afficher()
    {
        System.out.printf("%5d %30s %6.2f %7.1f %s\n",
           numero, nomPre, taille, poids, sexe == 'F' ? "feminin":"masculin");
    }

}

public class numero3
{
    static int lireAfficher(String nomFichier)
        throws IOException
    {
      final int LONG_NP = 30, COL1 = 37, COL2 = 41,
                              COL3 = 51, COL4 = 56,
                              COL5 = 64, COL6 = 68;

      int n = 0;
      boolean existeFichier = true ; 

      FileReader fr = null; 


       try {
             fr = new FileReader (nomFichier) ;
       }

       catch ( java.io.FileNotFoundException erreur) {
            System.out.println("Probleme d'ouvrir le fichier " +
                 nomFichier);
            existeFichier = false ; 
       }

       if (existeFichier) {



          BufferedReader entree = new BufferedReader(fr);
          boolean finFichier = false ;

          while ( !finFichier ) {


           String uneLigne = entree.readLine();

           if (uneLigne == null)
                finFichier = true ;
           else {

                 String unNom = uneLigne.substring(0,LONG_NP);

                 char unSexe = uneLigne.charAt(LONG_NP);

                 double uneTaille =
                    ( new Double(uneLigne.substring(COL1, COL2).trim())).doubleValue();
                 double unPoids   =
                    ( new Double(uneLigne.substring(COL3, COL4).trim())).doubleValue();
                 int unNumero = Integer.parseInt(uneLigne.substring(COL5, COL6).trim());


                 n++;
                 Personne unePers = new Personne(unNom, unSexe, uneTaille, unPoids, unNumero);
                    unePers.afficher();

           }
          }
         entree.close();
        }
      return n;
    }


static int lireRemplir(String nomFichier,Personne[]pers,Vector<Personne>vectPers)
        throws IOException
    {
      final int LONG_NP = 30, COL1 = 37, COL2 = 41,
                              COL3 = 51, COL4 = 56,
                              COL5 = 64, COL6 = 68;

      int n = 0;
      boolean existeFichier = true ; 

      FileReader fr = null; 


       try {
             fr = new FileReader (nomFichier) ;
       }

       catch ( java.io.FileNotFoundException erreur) {
            System.out.println("Probleme d'ouvrir le fichier " +
                 nomFichier);
            existeFichier = false ; 
       }

       if (existeFichier) {


          BufferedReader entree = new BufferedReader(fr);
          boolean finFichier = false ;

          while ( !finFichier ) {


           String uneLigne = entree.readLine();

           if (uneLigne == null)
                finFichier = true ;
           else {

                 String unNom = uneLigne.substring(0,LONG_NP);

                 char unSexe = uneLigne.charAt(LONG_NP); 


                 double uneTaille =
                    ( new Double(uneLigne.substring(COL1, COL2).trim())).doubleValue();
                 double unPoids   =
                    ( new Double(uneLigne.substring(COL3, COL4).trim())).doubleValue();
                 int unNumero = Integer.parseInt(uneLigne.substring(COL5, COL6).trim());



                 pers[n++]= new Personne(unNom, unSexe, uneTaille, unPoids, unNumero);
                 vectPers.add(new Personne(unNom, unSexe,uneTaille,unPoids,unNumero));
           }
          }
         entree.close();
        }
      return n;
    }

    public static void main (String[] args)
        throws IOException
    {

        int nbPers = lireAfficher("met_a14.txt");
        System.out.printf("On vient de lire %d personnes\n", nbPers);

        Vector<Personne> vectPers = new Vector<Personne> ();

        final int MAX_PERS=nbPers;
        Personne[] pers=new Personne[MAX_PERS];
        int nbPerso = lireRemplir("met_a14.txt",pers,vectPers);

        for(int i=0;i<vectPers.size();i++){
        System.out.println(vectPers.get(i));

    }
}

I was wondering if it is because i need to create a class Vector like my class Personne. But cant find any information on how to start it off.

You'll need to write a `toString()` method in your `Personne` class. Currently, your program doesn't know how it should print a `Personne` object, which is why you get the "weird" line. Have a look at http://stackoverflow.com/q/3615721 - some of the answers there explain it nicely. — Dawood ibn Kareem, Nov 09 '14 at 21:28
Basically a redefinition of toString? public String toString(){return String.format("%5d %30s %6.2f %7.1f %s\n",getNumero(),getNomPre(),getTaille(),getPoids(),getSexe()== 'F' ? "feminin":"masculin");} — user3268216, Nov 09 '14 at 21:39
Yeah, that looks good. Why don't you try it, and see if it fixes your problem? — Dawood ibn Kareem, Nov 09 '14 at 21:50

score 1 · Accepted Answer · answered Nov 09 '14 at 21:28

You should override the toString() method in Person class to get a meaningful output. The value printed is from the default implementation of toString() in java.lang.Object class.

This page on toString() in JavaPractices should give you more information.

Creating and Accessing Vector class

1 Answers1