Bonjour,
voila je suis etudiant en dev, et je suis en train de codé une application de gestion de frais kilométrique. J'ai créé 3 classe, une classe Frais, une classe Ville et une classe Main.


Classe Frais
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package FraisKm;
 
import java.util.ArrayList;
import java.util.Date;
 
/**
 *
 * @author Aldric ANDRE
 */
public class Frais {
    private Date date;
    private String destination;
    private String motif;
    private boolean forfait;
    private double txForfait;
    private double txKm;
    private double nbKm;
    private double indeKm;
    private double indeF;
 
    private ArrayList lesFrais = new ArrayList();
    public void Frais(Date d,String dest,String mo,boolean f,double eF,double km,double eKm){
        if(f=true){
 
        }
        else{
            setIndeKm(km*eKm);
        }
        this.setMotif(mo);
        this.setDestination(dest);
        this.setDate(d);
        this.setForfait(f);
        this.setTxForfait(eF);
        this.setNbKm(km);
        this.setTxKm(eKm);
        getLesFrais().add(this);
    }
 
    /**
     * @return the date
     */
    public Date getDate() {
        return date;
    }
 
    /**
     * @return the forfait
     */
    public boolean isForfait() {
        return forfait;
    }
 
 
    /**
     * @return the txForfait
     */
    public double getTxForfait() {
        return txForfait;
    }
 
    /**
     * @return the txKm
     */
    public double getTxKm() {
        return txKm;
    }
 
 
 
    /**
     * @return the indeKm
     */
    public double getIndeKm() {
        return indeKm;
    }
 
    /**
     * @return the indeF
     */
    public double getIndeF() {
        return indeF;
    }
 
    /**
     * @return the lesFrais
     */
    public ArrayList getLesFrais() {
        return lesFrais;
    }
 
    /**
     * @param date the date to set
     */
    public void setDate(Date date) {
        this.date = date;
    }
 
    /**
     * @param forfait the forfait to set
     */
    public void setForfait(boolean forfait) {
        this.forfait = forfait;
    }
 
 
    /**
     * @param txForfait the txForfait to set
     */
    public void setTxForfait(double txForfait) {
        this.txForfait = txForfait;
    }
 
    /**
     * @param txKm the txKm to set
     */
    public void setTxKm(double txKm) {
        this.txKm = txKm;
    }
 
    /**
     * @param nbKm the nbKm to set
     */
    public void setNbKm(double nbKm) {
        this.nbKm = nbKm;
    }
 
    /**
     * @param indeKm the indeKm to set
     */
    public void setIndeKm(double indeKm) {
        this.indeKm = indeKm;
    }
 
    /**
     * @param indeF the indeF to set
     */
    public void setIndeF(double indeF) {
        this.indeF = indeF;
    }
 
    /**
     * @param lesFrais the lesFrais to set
     */
    public void setLesFrais(ArrayList lesFrais) {
        this.lesFrais = lesFrais;
    }
 
    /**
     * @return the destination
     */
    public String getDestination() {
        return destination;
    }
 
    /**
     * @param destination the destination to set
     */
    public void setDestination(String destination) {
        this.destination = destination;
    }
 
    /**
     * @return the motif
     */
    public String getMotif() {
        return motif;
    }
 
    /**
     * @param motif the motif to set
     */
    public void setMotif(String motif) {
        this.motif = motif;
    }
 
}
Classe Ville
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package FraisKm;
 
import java.util.ArrayList;
 
/**
 *
 * @author Aldric ANDRE
 */
public class Villes {
    private String nomVille;
    private double kmNancy;
    public ArrayList<Villes> lesVilles = new ArrayList<Villes>();
    public Villes(String n,double km){
        this.nomVille = n;
        this.kmNancy = km;
        lesVilles.add(this);
    }
 
    Villes Eloyes = new Villes("Eloyes (88) ",85);
    Villes Vagney = new Villes("Vagney (88)",104);
    Villes Paris = new Villes("Paris (75)",356);
    Villes Vittel = new Villes("Vittel (88)",88);
    Villes Epinal = new Villes("Epinal (88)",70);
    Villes Marly = new Villes("Marly (57)",48);
    Villes Metz = new Villes("Metz (57)",55);
    Villes FresseSurMoselle = new Villes("Fresse-sur-Moselle (88)",119);
    Villes Golbey = new Villes("Golbey (88)",65);
    Villes Brabois = new Villes("Brabois (54)",4);
    Villes VandoeuvreLesNancy = new Villes("Vandoeuvre-lès-Nancy (54)",4);
    Villes Pompey = new Villes("Pompey (54)",11);
    Villes LeTholy = new Villes("Les Tholy (88)",94);
    Villes Lille = new Villes("Lille (59)",452);
    Villes Mulhouse = new Villes("Mulhouse (68)",174);
    Villes Lyon = new Villes("Lyon (69)",403);
    Villes Ludres = new Villes("Ludres (54)",10);
    Villes Beaune = new Villes("Beaune (21)",263);
    Villes RuptSurMoselle = new Villes("Rupt-sur-Moselle (88)",105);
    Villes Hauconcourt = new Villes("Hauconcourt (57)",67);
    Villes EsseyLèsNancy = new Villes("Essey-lès-Nancy (54)",5.5);
    Villes LaBresse = new Villes("La Bresse (88)",117);
    Villes Laxou = new Villes("Laxou (54)",2.9);
    Villes Maxeville = new Villes("Maxeville (54)",3.3);
    Villes Toul = new Villes("Toul (54)",23);
    Villes VitryLeFrançois = new Villes("Vitry-le-François (51)",138);
    Villes FachesThumesnil = new Villes("Faches-Thumesnil (59)",445);
    Villes Houdemont = new Villes("Houdemont (54)",6);
    Villes Heillecourt = new Villes("Heillecourt (54)",5.1);
    Villes Fleville = new Villes("Fléville (08)",184);
    Villes Contrexeville = new Villes("Contrexeville (88)",83);
    Villes Luneville = new Villes("Lunéville (54)",33);
    Villes StEtienneLesRemiremont = new Villes("St-Etienne-lès-Remiremont (88)",96);
    Villes StDieDesVosges = new Villes("Saint-Dié-des-Vosges (88)",84);
    Villes Langes = new Villes("Langes (52)",150);
    Villes Chaumont = new Villes("Chaumont (52)",168);
    Villes Donzere = new Villes("Donzère (26)",573);
    Villes LeMans = new Villes("Le Mans (72)",580);
 
    /**
     * @return the nomVille
     */
    public String getNomVille() {
        return nomVille;
    }
 
    /**
     * @param nomVille the nomVille to set
     */
    public void setNomVille(String nomVille) {
        this.nomVille = nomVille;
    }
 
    /**
     * @return the kmNancy
     */
    public double getKmNancy() {
        return kmNancy;
    }
 
    /**
     * @param kmNancy the kmNancy to set
     */
    public void setKmNancy(double kmNancy) {
        this.kmNancy = kmNancy;
    }
 
    /**
     * @return the lesVilles
     */
    public ArrayList<Villes> getLesVilles() {
        return lesVilles;
    }
 
    /**
     * @param lesVilles the lesVilles to set
     */
    public void setLesVilles(ArrayList<Villes> lesVilles) {
        this.lesVilles = lesVilles;
    }
 
 
 
 
 
}
Classe MainFrame (celle qui contient le design)
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package FraisKm;
/**
 *
 * @author Aldric ANDRE
 */
public class MainFrame extends javax.swing.JFrame {
    private String nom;
    private String qualification;
    /**
     * Creates new form MainFrame
     */
    public MainFrame() {
        initComponents();
    }
 
    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
 
        panelSalarie = new javax.swing.JPanel();
        txtNom = new javax.swing.JTextField();
        lblNom = new javax.swing.JLabel();
        lblQualif = new javax.swing.JLabel();
        txtQualif = new javax.swing.JTextField();
        lblDate = new javax.swing.JLabel();
        lblMois = new javax.swing.JLabel();
        cbbMois = new javax.swing.JComboBox();
        lblFormateur = new javax.swing.JLabel();
        txtFormateur = new javax.swing.JTextField();
        cbbMoisDemande = new javax.swing.JComboBox();
        txtJourDemande = new javax.swing.JTextField();
        txtAnneeDemande = new javax.swing.JTextField();
        jSeparator1 = new javax.swing.JSeparator();
        jScrollPane1 = new javax.swing.JScrollPane();
        tabDemande = new javax.swing.JTable();
        jSeparator2 = new javax.swing.JSeparator();
        dualPanel = new javax.swing.JTabbedPane();
        pKm = new javax.swing.JPanel();
        btnValiderKm = new javax.swing.JButton();
        cbAutreVille = new javax.swing.JCheckBox();
        txtAutreVille = new javax.swing.JTextField();
        lblNbKm = new javax.swing.JLabel();
        txtMotif = new javax.swing.JTextField();
        lblMotif = new javax.swing.JLabel();
        cbbVille = new javax.swing.JComboBox();
        lblVille = new javax.swing.JLabel();
        filler1 = new javax.swing.Box.Filler(new java.awt.Dimension(0, 0), new java.awt.Dimension(0, 0), new java.awt.Dimension(32767, 32767));
        txtNbKm = new javax.swing.JTextField();
        pForfait = new javax.swing.JPanel();
        btnValiderForfait = new javax.swing.JButton();
        cbAutreVilleForfait = new javax.swing.JCheckBox();
        txtAutreVilleForfait = new javax.swing.JTextField();
        lblNbKmForfait = new javax.swing.JLabel();
        txtMotifForfait = new javax.swing.JTextField();
        lblMotifForfait = new javax.swing.JLabel();
        cbbVilleForfait = new javax.swing.JComboBox();
        lblVilleForfait = new javax.swing.JLabel();
        txtNbKmForfait = new javax.swing.JTextField();
        lblForfait = new javax.swing.JLabel();
        txtForfait = new javax.swing.JTextField();
 
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR));
        setMinimumSize(new java.awt.Dimension(440, 865));
        setResizable(false);
        setSize(new java.awt.Dimension(400, 1015));
 
        panelSalarie.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Salarié", javax.swing.border.TitledBorder.LEFT, javax.swing.border.TitledBorder.DEFAULT_POSITION));
 
        txtNom.setToolTipText("");
        txtNom.setName(""); // NOI18N
 
        lblNom.setText("Nom du salarié :");
 
        lblQualif.setText("Qualification :");
 
        lblDate.setText("Date de demande :");
 
        lblMois.setText("Mois de :");
 
        cbbMois.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Janvier", "Fevrier", "Mars", "Avril", "Mai", "Juin", "Juillet", "Aout", "Septembre", "Octobre", "Novembre", "Decembre" }));
 
        lblFormateur.setText("Formateur :");
 
        cbbMoisDemande.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Janvier", "Fevrier", "Mars", "Avril", "Mai", "Juin", "Juillet", "Aout", "Septembre", "Octobre", "Novembre", "Decembre" }));
 
        org.jdesktop.layout.GroupLayout panelSalarieLayout = new org.jdesktop.layout.GroupLayout(panelSalarie);
        panelSalarie.setLayout(panelSalarieLayout);
        panelSalarieLayout.setHorizontalGroup(
            panelSalarieLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(panelSalarieLayout.createSequentialGroup()
                .add(28, 28, 28)
                .add(panelSalarieLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(panelSalarieLayout.createSequentialGroup()
                        .add(panelSalarieLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                            .add(lblNom)
                            .add(lblQualif))
                        .add(18, 18, 18)
                        .add(panelSalarieLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING, false)
                            .add(txtQualif, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 164, Short.MAX_VALUE)
                            .add(txtNom)))
                    .add(panelSalarieLayout.createSequentialGroup()
                        .add(panelSalarieLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                            .add(lblDate)
                            .add(lblMois)
                            .add(lblFormateur))
                        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                        .add(panelSalarieLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING, false)
                            .add(org.jdesktop.layout.GroupLayout.LEADING, cbbMois, 0, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .add(org.jdesktop.layout.GroupLayout.LEADING, panelSalarieLayout.createSequentialGroup()
                                .add(txtJourDemande, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 35, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                                .add(cbbMoisDemande, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                            .add(txtFormateur))
                        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                        .add(txtAnneeDemande, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 51, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        panelSalarieLayout.setVerticalGroup(
            panelSalarieLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(panelSalarieLayout.createSequentialGroup()
                .addContainerGap()
                .add(panelSalarieLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(txtNom, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                    .add(lblNom))
                .add(18, 18, 18)
                .add(panelSalarieLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(lblQualif)
                    .add(txtQualif, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .add(12, 12, 12)
                .add(panelSalarieLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(lblDate)
                    .add(cbbMoisDemande, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                    .add(txtJourDemande, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                    .add(txtAnneeDemande, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .add(18, 18, 18)
                .add(panelSalarieLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(lblMois)
                    .add(cbbMois, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .add(18, 18, 18)
                .add(panelSalarieLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(lblFormateur)
                    .add(txtFormateur, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
 
        jScrollPane1.setViewportView(tabDemande);
 
        btnValiderKm.setText("Valider Frais");
 
        cbAutreVille.setText("Autre ville :");
        cbAutreVille.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                cbAutreVilleActionPerformed(evt);
            }
        });
 
        txtAutreVille.setVisible(false);
        txtAutreVille.setEditable(false);
 
        lblNbKm.setVisible(false);
        lblNbKm.setText("Nb Km :");
 
        lblMotif.setText("Motif / Client :");
 
        cbbVille.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Item 1", "Item 2", "Item 3", "Item 4" }));
 
        lblVille.setText("Ville :");
 
        txtNbKm.setVisible(false);
        txtNbKm.setEditable(false);
 
        org.jdesktop.layout.GroupLayout pKmLayout = new org.jdesktop.layout.GroupLayout(pKm);
        pKm.setLayout(pKmLayout);
        pKmLayout.setHorizontalGroup(
            pKmLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(pKmLayout.createSequentialGroup()
                .add(pKmLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(pKmLayout.createSequentialGroup()
                        .add(141, 141, 141)
                        .add(btnValiderKm)
                        .add(31, 31, 31)
                        .add(filler1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                        .add(0, 0, Short.MAX_VALUE))
                    .add(pKmLayout.createSequentialGroup()
                        .add(29, 29, 29)
                        .add(pKmLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
                            .add(lblNbKm)
                            .add(cbAutreVille)
                            .add(lblMotif)
                            .add(lblVille))
                        .add(18, 18, 18)
                        .add(pKmLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                            .add(org.jdesktop.layout.GroupLayout.TRAILING, txtAutreVille)
                            .add(org.jdesktop.layout.GroupLayout.TRAILING, pKmLayout.createSequentialGroup()
                                .add(0, 0, Short.MAX_VALUE)
                                .add(txtNbKm, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 156, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                            .add(pKmLayout.createSequentialGroup()
                                .add(txtMotif, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 156, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                                .add(0, 0, Short.MAX_VALUE))
                            .add(cbbVille, 0, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
                .add(93, 93, 93))
        );
        pKmLayout.setVerticalGroup(
            pKmLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(org.jdesktop.layout.GroupLayout.TRAILING, pKmLayout.createSequentialGroup()
                .addContainerGap(51, Short.MAX_VALUE)
                .add(pKmLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(lblVille)
                    .add(cbbVille, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .add(18, 18, 18)
                .add(pKmLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(lblMotif)
                    .add(txtMotif, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .add(31, 31, 31)
                .add(pKmLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(txtAutreVille, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                    .add(cbAutreVille))
                .add(4, 4, 4)
                .add(pKmLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(txtNbKm, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                    .add(lblNbKm))
                .add(pKmLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(pKmLayout.createSequentialGroup()
                        .add(22, 22, 22)
                        .add(filler1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                    .add(pKmLayout.createSequentialGroup()
                        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                        .add(btnValiderKm)))
                .addContainerGap())
        );
 
        dualPanel.addTab("Kilomètre", pKm);
 
        btnValiderForfait.setText("Valider Frais");
 
        cbAutreVilleForfait.setText("Autre ville :");
        cbAutreVilleForfait.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                cbAutreVilleForfaitActionPerformed(evt);
            }
        });
 
        txtAutreVilleForfait.setVisible(false);
        txtAutreVilleForfait.setEditable(false);
 
        lblNbKmForfait.setVisible(false);
        lblNbKmForfait.setText("Nb Km :");
 
        lblMotifForfait.setText("Motif / Client :");
 
        cbbVilleForfait.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                cbbVilleForfaitActionPerformed(evt);
            }
        });
 
        lblVilleForfait.setText("Ville :");
 
        txtNbKmForfait.setVisible(false);
        txtNbKmForfait.setEditable(false);
 
        lblForfait.setText("Budget forfait :");
 
        org.jdesktop.layout.GroupLayout pForfaitLayout = new org.jdesktop.layout.GroupLayout(pForfait);
        pForfait.setLayout(pForfaitLayout);
        pForfaitLayout.setHorizontalGroup(
            pForfaitLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(pForfaitLayout.createSequentialGroup()
                .add(pForfaitLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(pForfaitLayout.createSequentialGroup()
                        .add(98, 98, 98)
                        .add(lblVilleForfait)
                        .add(18, 18, 18)
                        .add(cbbVilleForfait, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 156, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                    .add(pForfaitLayout.createSequentialGroup()
                        .add(40, 40, 40)
                        .add(lblMotifForfait)
                        .add(18, 18, 18)
                        .add(txtMotifForfait, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 156, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                    .add(pForfaitLayout.createSequentialGroup()
                        .add(39, 39, 39)
                        .add(lblForfait)
                        .add(18, 18, 18)
                        .add(txtForfait, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 156, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                    .add(pForfaitLayout.createSequentialGroup()
                        .add(35, 35, 35)
                        .add(cbAutreVilleForfait)
                        .addPreferredGap(org.jdesktop.layout.LayoutStyle.UNRELATED)
                        .add(txtAutreVilleForfait, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 156, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                    .add(pForfaitLayout.createSequentialGroup()
                        .add(83, 83, 83)
                        .add(lblNbKmForfait)
                        .add(18, 18, 18)
                        .add(txtNbKmForfait, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 156, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                    .add(pForfaitLayout.createSequentialGroup()
                        .add(137, 137, 137)
                        .add(btnValiderForfait)))
                .add(87, 87, 87))
        );
        pForfaitLayout.setVerticalGroup(
            pForfaitLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(pForfaitLayout.createSequentialGroup()
                .add(18, 18, 18)
                .add(pForfaitLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(pForfaitLayout.createSequentialGroup()
                        .add(4, 4, 4)
                        .add(lblVilleForfait))
                    .add(cbbVilleForfait, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .add(12, 12, 12)
                .add(pForfaitLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(pForfaitLayout.createSequentialGroup()
                        .add(6, 6, 6)
                        .add(lblMotifForfait))
                    .add(txtMotifForfait, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(pForfaitLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(txtForfait, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                    .add(lblForfait))
                .add(18, 18, 18)
                .add(pForfaitLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(txtAutreVilleForfait, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                    .add(cbAutreVilleForfait))
                .add(4, 4, 4)
                .add(pForfaitLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(txtNbKmForfait, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                    .add(lblNbKmForfait))
                .add(18, 18, 18)
                .add(btnValiderForfait)
                .addContainerGap())
        );
 
        dualPanel.addTab("Kilomètre", pForfait);
 
        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(jSeparator2)
            .add(layout.createSequentialGroup()
                .addContainerGap()
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE)
                    .add(layout.createSequentialGroup()
                        .add(panelSalarie, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                        .add(0, 8, Short.MAX_VALUE))
                    .add(jSeparator1)
                    .add(org.jdesktop.layout.GroupLayout.TRAILING, dualPanel, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .addContainerGap()
                .add(panelSalarie, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(jSeparator2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .add(dualPanel, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(jSeparator1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 173, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .add(259, 259, 259))
        );
 
        pack();
    }// </editor-fold>
 
    private void cbAutreVilleActionPerformed(java.awt.event.ActionEvent evt) {                                             
        if(cbAutreVille.isSelected()==true){
            txtAutreVille.setEditable(true);
            txtAutreVille.setVisible(true);
            txtNbKm.setVisible(true);
            txtNbKm.setEditable(true);
            cbbVille.setEnabled(false);
            lblNbKm.setVisible(true);
 
        }
        if(cbAutreVille.isSelected()==false){
            txtAutreVille.setEditable(false);
            txtAutreVille.setVisible(false);
            txtNbKm.setVisible(false);
            txtNbKm.setEditable(false);
            cbbVille.setEnabled(true);
            lblNbKm.setVisible(false);
        }
    }                                            
 
    private void cbAutreVilleForfaitActionPerformed(java.awt.event.ActionEvent evt) {                                                    
        if(cbAutreVilleForfait.isSelected()==true){
            txtAutreVilleForfait.setEditable(true);
            txtAutreVilleForfait.setVisible(true);
            txtNbKmForfait.setVisible(true);
            txtNbKmForfait.setEditable(true);
            cbbVilleForfait.setEnabled(false);
            lblNbKmForfait.setVisible(true);
 
        }
        if(cbAutreVilleForfait.isSelected()==false){
            txtAutreVilleForfait.setEditable(false);
            txtAutreVilleForfait.setVisible(false);
            txtNbKmForfait.setVisible(false);
            txtNbKmForfait.setEditable(false);
            cbbVilleForfait.setEnabled(true);
            lblNbKmForfait.setVisible(false);
        }
    }                                                   
 
    private void cbbVilleForfaitActionPerformed(java.awt.event.ActionEvent evt) {
 
    }
 
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Mac OS X".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>
 
        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new MainFrame().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JButton btnValiderForfait;
    private javax.swing.JButton btnValiderKm;
    private javax.swing.JCheckBox cbAutreVille;
    private javax.swing.JCheckBox cbAutreVilleForfait;
    private javax.swing.JComboBox cbbMois;
    private javax.swing.JComboBox cbbMoisDemande;
    private javax.swing.JComboBox cbbVille;
    private javax.swing.JComboBox cbbVilleForfait;
    private javax.swing.JTabbedPane dualPanel;
    private javax.swing.Box.Filler filler1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JSeparator jSeparator1;
    private javax.swing.JSeparator jSeparator2;
    private javax.swing.JLabel lblDate;
    private javax.swing.JLabel lblForfait;
    private javax.swing.JLabel lblFormateur;
    private javax.swing.JLabel lblMois;
    private javax.swing.JLabel lblMotif;
    private javax.swing.JLabel lblMotifForfait;
    private javax.swing.JLabel lblNbKm;
    private javax.swing.JLabel lblNbKmForfait;
    private javax.swing.JLabel lblNom;
    private javax.swing.JLabel lblQualif;
    private javax.swing.JLabel lblVille;
    private javax.swing.JLabel lblVilleForfait;
    private javax.swing.JPanel pForfait;
    private javax.swing.JPanel pKm;
    private javax.swing.JPanel panelSalarie;
    private javax.swing.JTable tabDemande;
    private javax.swing.JTextField txtAnneeDemande;
    private javax.swing.JTextField txtAutreVille;
    private javax.swing.JTextField txtAutreVilleForfait;
    private javax.swing.JTextField txtForfait;
    private javax.swing.JTextField txtFormateur;
    private javax.swing.JTextField txtJourDemande;
    private javax.swing.JTextField txtMotif;
    private javax.swing.JTextField txtMotifForfait;
    private javax.swing.JTextField txtNbKm;
    private javax.swing.JTextField txtNbKmForfait;
    private javax.swing.JTextField txtNom;
    private javax.swing.JTextField txtQualif;
    // End of variables declaration
}

et voici un screen de mon programme



Voila, maintenant je vous explique mon problème. Dans la classe Villes, je créé toute mes villes que je place ensuite dans une ArrayList<Villes> et je voudrais afficher les noms des villes dans les cbbVilles et cbbVillesForfait. Mais je ne sait pas du tout comment faire.
Help me plz