problem with my programme

[manjava]

Hello ,

please can any one help me for my this i don't know why didn't gave me my return true he juste return this :les magasins situés dans la ville projetd314.List eMagasin@a401c2
why see my code

public interface IMagasin {
public double getLatitude();
public double getLongitude();
public String getCode();
public String getVille();
public void setLatitude(double l);
public void setLongitude(double lon);
public void setCode(String string);
public void setVille(String string);
}

/*
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 * and open the template in the editor.
 */

package projetd314;
import java.sql.*;
import java.sql.PreparedStatement;
import java.lang.Math.*;
import java.util.Vector;






public class Magasin {
    static java.sql.Connection c=null;
double latitude=0;
double longitude=0;
String codeville="";
String ville="";
public double getLatitude(){
    return latitude;
}
public double getLongitude(){
        return longitude;
        }
public String getCode(){
    return codeville;
}
public String getVille(){
    return ville;
}
public void setLatitude(double l){
    latitude=l;
}
public void setLongitude(double lon){
    longitude=lon;
}
public void setCode(String string){
    codeville=string;

}
public void setVille(String string){
    ville=string;
}


    }

/*
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 * and open the template in the editor.
 */

package projetd314;
import projetd314.IMagasin;
import projetd314.ListeMagasin;
import projetd314.ListeMagasinAdapter;
import projetd314.Magasin;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;




public class MagasinServices {
    public  ListeMagasin listeMagasin=new ListeMagasin();
    static java.sql.Connection c=null;
	public static void etablirConnexion(){
		String pilote="com.mysql.jdbc.Driver";
		try{Class.forName(pilote).newInstance();}
		catch(Exception e){System.out.println("echec pilote :"+e);
		}
		String url="jdbc:mysql://localhost:3306/boutiquegeographique";String user="root";String password="";
		try{c=DriverManager.getConnection(url,user,password);

        }
		catch(SQLException e){System.out.println("echec connection a la bdd :"+e);}

	}

        public  ListeMagasin listMagasinsVille(String nomville)
        {
      	           double latitude;
                   double l;
                if(Magasin.c==null) etablirConnexion();
      try{
                        PreparedStatement st=c.prepareStatement("select latitude,longitude,nomville from liste_magasins where nomville=?");
                        st.setString(1, nomville);
                        ResultSet rs=st.executeQuery();

                while(rs.next())
                {
                        Magasin m=new Magasin();
                        m.setLatitude(rs.getDouble("latitude"));
                        m.setLongitude(rs.getDouble("longitude"));
                        m.setVille(rs.getString("nomville"));
                        listeMagasin.addMagasin(m);
               }
          }catch(Exception e){System.out.println("erreur selection"+e);}
           return  listeMagasin;
    }



}

/*
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 * and open the template in the editor.
 */

package projetd314;

import java.util.Vector;

/**
 *
 * @author kamar
 */
public class ListeMagasinAdapter {
public IMagasin[] liste;
public ListeMagasinAdapter(ListeMagasin obj){
   Vector<IMagasin>  l=obj.getListe();
   liste =l.toArray(new IMagasin[l.size()]);
}
public IMagasin[] getListe(){
    return liste;
}
public void setListe(IMagasin[] liste){
    this.liste=liste;
}
}

/*
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 * and open the template in the editor.
 */

package projetd314;

import java.util.Iterator;
import java.util.Vector;


public class ListeMagasin {
    private Vector liste=new Vector();
    public Magasin getMagasin(int i){
        return (Magasin)liste.get(i);
    }

    public Vector getListe(){
        return liste;
    }
    public void setListe(Vector liste){
        this.liste=liste;

    }
    public void addMagasin(Magasin m){
        int i;
        for(i=0;i<liste.size();i++)
        {
            liste.add(m);
                return;
            
        }
        liste.add(m);
    }
    public String listMagasinsVille(String nomville){

    Iterator  iterateur=liste.iterator();
    String str="";
    while(iterateur.hasNext())
    {
        Magasin ma=(Magasin)iterateur.next();
        String v=ma.getVille();
        if(nomville==v){
            double lat=ma.getLatitude();
            double lon=ma.getLongitude();
            str+="Latitude:"+lat+"Longitude:"+lon+"\n";}
    }
    return str;
    }

}

/*
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 * and open the template in the editor.
 */

package projetd314;


public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        MagasinServices c=new MagasinServices();
       System.out.println("les magasins situés dans la ville "+c.listMagasinsVille("Amiens"));
    }

}

thanks

[pbrockway2]

That's a lot of code for a small question!

Anyway, if you want a ListeMagasin instance to print nicely you need to give the class a toString() method. println() will use this to create the string to be printed.

public class ListeMagasin {

    // other stuff

    public String toString() {
        // use a StringBuilder and loop over the Vector contents?
        // or use the vector toString() method
        // or etc
        return "some string that describes the magasin list";
    }
}

Why are using Vector rather than one of the other list implementations?

[manjava]

hello,

i want to call my method listMagasinsVil le(String nomville) but the return this les magasins situés dans la ville projetd314.List eMagasin@c51355

why please help me

thanks

[Frinavale]

Please re-read the suggestion that pbrockway2 posted.

You need to write a ToString() method for your ListeMagasin class. If you do not write a ToString() method for the class then the default ToString method is used. The Default ToString method returns you "projetd314.Lis teMagasin@c5135 5" which doesn't make much sense.

public class ListeMagasin {
//....Other Stuff .....//
public String ToString(){
   Iterator  iterateur=liste.iterator();
   String str="";
   while(iterateur.hasNext())
   {
         Magasin ma=(Magasin)iterateur.next();
         String v=ma.getVille();
         if(nomville==v){
             double lat=ma.getLatitude();
             double lon=ma.getLongitude();
             str+="Latitude:"+lat.ToString()+" Longitude:"+lon.ToString()+"\n";}
   }
   return str;
}

Then call the ToString Method:

 
public class Main {
 
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        MagasinServices c=new MagasinServices();
       System.out.println("les magasins situés dans la ville "+c.listMagasinsVille("Amiens").ToString());
    }
 
}

[manjava]

i put my method listMagasinsVil le in class and ADD the method ToString but there somme body

{ Iterator  iterateur=liste.iterator();
    String str="";
    while(iterateur.hasNext())
    {
        Magasin ma=(Magasin)iterateur.next();
        String v=ma.getVille();
        if(nomville==v){
            double lat=ma.getLatitude();
            double lon=ma.getLongitude();
            str+="Latitude:"+lat+"Longitude:"+lon+"\n";}
    }
    return str;
    }

CAN YOU TELL ME WHAT I PUT IN MY CLASS listmagasin

thank you for help

[pbrockway2]

But note that toString() should start with a lower case "t". And the methods cannot be applied to primitive values. So one possible way of building up the string could be:

//str+="Latitude:"+lat.ToString()+" Longitude:"+lon.ToString()+"\n";
str += "Latitude: "  + lat + " Longitude: " + lon + "\n";

(as I think you had)

Also note that you can't really compare strings with ==. So "v.equals(nomvi lle)" not "nomville== v".

[manjava]

thank you for your help