MVC na pratica

import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Observable;
import java.util.Observer;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class Vue extends javax.swing.JFrame implements Observer {

    //CREATION DE L'OBJET DU TYPE FENETRE JFileChooser
    JFileChooser fileChooser = new JFileChooser();
    Modele modele;

    public Vue(Modele modele) {
        initComponents();
        this.modele = modele;
        modele.addObserver(this);
    }

    public Vue() {
        initComponents();
    }

    public void addListenersToView(Controleur cont) {
        jButton3.addActionListener(cont);
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();
        jButton3 = new javax.swing.JButton();
        jButton4 = new javax.swing.JButton();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jButton5 = new javax.swing.JButton();
        jButton6 = new javax.swing.JButton();
        jButton7 = new javax.swing.JButton();
        jTextField2 = new javax.swing.JTextField();
        jTextField3 = new javax.swing.JTextField();
        jButton8 = new javax.swing.JButton();
        jLabel5 = new javax.swing.JLabel();
        jLabel6 = new javax.swing.JLabel();
        jScrollPane1 = new javax.swing.JScrollPane();
        jList1 = new javax.swing.JList();
        jSeparator1 = new javax.swing.JSeparator();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());

        jLabel1.setText("Visionneuse");
        jPanel1.add(jLabel1, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 30, 240, 30));

        jButton1.setText("BR");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });
        jPanel1.add(jButton1, new org.netbeans.lib.awtextra.AbsoluteConstraints(690, 20, -1, -1));

        jButton2.setText("JP");
        jButton2.setMaximumSize(new java.awt.Dimension(45, 23));
        jButton2.setMinimumSize(new java.awt.Dimension(45, 23));
        jButton2.setPreferredSize(new java.awt.Dimension(45, 23));
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                 jButton2ActionPerformed(evt);
            }
        });
        jPanel1.add(jButton2, new org.netbeans.lib.awtextra.AbsoluteConstraints(790, 20, -1, -1));

        jButton3.setText("CHOISIR REPERTOIRE D'IMAGE");
        jButton3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton3ActionPerformed(evt);
            }
        });
        jPanel1.add(jButton3, new org.netbeans.lib.awtextra.AbsoluteConstraints(30, 100, 290, 43));

        jButton4.setText("MODIFIER LE NOM D'IMAGE");
        jButton4.setEnabled(false);
        jButton4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton4ActionPerformed(evt);
            }
        });
        jPanel1.add(jButton4, new org.netbeans.lib.awtextra.AbsoluteConstraints(30, 200, 290, 42));

        jLabel2.setText("Regarder l'Image:");
        jPanel1.add(jLabel2, new org.netbeans.lib.awtextra.AbsoluteConstraints(350, 60, -1, -1));
        jPanel1.add(jLabel3, new org.netbeans.lib.awtextra.AbsoluteConstraints(350, 120, 490, 320));

        jLabel4.setText("Mots Clés:");
        jPanel1.add(jLabel4, new org.netbeans.lib.awtextra.AbsoluteConstraints(30, 280, 60, -1));
        jPanel1.add(jTextField1, new org.netbeans.lib.awtextra.AbsoluteConstraints(90, 270, 240, 30));

        jButton5.setText("Adicioner");
        jButton5.setEnabled(false);
        jButton5.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton5ActionPerformed(evt);
            }
        });
        jPanel1.add(jButton5, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 320, 90, -1));

        jButton6.setText("Modifier");
        jButton6.setEnabled(false);
        jPanel1.add(jButton6, new org.netbeans.lib.awtextra.AbsoluteConstraints(120, 320, 100, -1));

        jButton7.setText("Chercher");
        jButton7.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton7ActionPerformed(evt);
            }
        });
        jPanel1.add(jButton7, new org.netbeans.lib.awtextra.AbsoluteConstraints(230, 320, 100, -1));

        jTextField2.setEnabled(false);
        jTextField2.setName("JTextField2"); // NOI18N
        jPanel1.add(jTextField2, new org.netbeans.lib.awtextra.AbsoluteConstraints(350, 80, 490, 30));
        jPanel1.add(jTextField3, new org.netbeans.lib.awtextra.AbsoluteConstraints(30, 170, 290, 30));

        jButton8.setText("FR");
        jButton8.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton8ActionPerformed(evt);
            }
        });
        jPanel1.add(jButton8, new org.netbeans.lib.awtextra.AbsoluteConstraints(740, 20, -1, -1));
        jPanel1.add(jLabel5, new org.netbeans.lib.awtextra.AbsoluteConstraints(30, 150, 210, 20));
        jPanel1.add(jLabel6, new org.netbeans.lib.awtextra.AbsoluteConstraints(30, 300, 140, 20));

        jList1.addListSelectionListener(new javax.swing.event.ListSelectionListener() {
            public void valueChanged(javax.swing.event.ListSelectionEvent evt) {
                jList1ValueChanged(evt);
            }
        });
        jScrollPane1.setViewportView(jList1);

        jPanel1.add(jScrollPane1, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 360, 310, 90));
        jPanel1.add(jSeparator1, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 250, 320, 10));

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 861, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(0, 0, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 460, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(0, 0, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    public void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton3ActionPerformed
        modele.imagemm();
    }//GEN-LAST:event_jButton3ActionPerformed

    private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton4ActionPerformed
        try {
            // to(jTextField3.getText());
            modele.rename(jTextField3.getText());
        } catch (IOException ex) {
            Logger.getLogger(Vue.class.getName()).log(Level.SEVERE, null, ex);
        }
        jButton4.setEnabled(false);
    }//GEN-LAST:event_jButton4ActionPerformed

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed

        jLabel1.setText("TRATAR IMAGEM");
        jLabel2.setText("Veja a Imagem:");
        jLabel4.setText("Chave:");
        jButton3.setText("PESQUISAR IMAGEM");
        jButton4.setText("RENOMEAR IMAGEM");
        jButton5.setText("Adicionar");
        jButton6.setText("Modificar");
        jButton7.setText("Pesquisar");

    }//GEN-LAST:event_jButton1ActionPerformed

    private void jButton8ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton8ActionPerformed
        jLabel1.setText("Visionneuse");
        jLabel2.setText("Regarder l'Image:");
        jLabel4.setText("Mots Clés:");
        jButton3.setText("CHOISIR REPERTOIRE D'IMAGE");
        jButton4.setText("MODIFIER LE NOM D'IMAGE");
        jButton5.setText("Adicioner");
        jButton6.setText("Modifier");
        jButton7.setText("Chercher");
    }//GEN-LAST:event_jButton8ActionPerformed

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton2ActionPerformed
        jLabel1.setText("&#12471;&#12456; &#12459;&#12458;&#12456;&#12473;");
        jLabel2.setText("&#12452;&#12510;&#12472;&#12455;&#12531;");
        jLabel4.setText("&#12497;&#12521;&#12502;&#12521;");
        jButton3.setText("&#12456;&#12473;&#12467;&#12522;&#12455;&#12523;");
        jButton4.setText("&#12488;&#12521;&#12510;&#12459;&#12458;");
        jButton5.setText("&#12450;&#12482;&#12471;");
        jButton6.setText("&#12514;&#12482;&#12459;");
        jButton7.setText("&#12506;&#12461;&#12469;&#12531;&#12489;");
    }//GEN-LAST:event_jButton2ActionPerformed

    private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton5ActionPerformed
        try {
            modele.fichier();
        } catch (FileNotFoundException ex) {
            Logger.getLogger(Vue.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(Vue.class.getName()).log(Level.SEVERE, null, ex);
        }
    }//GEN-LAST:event_jButton5ActionPerformed

    private void jButton7ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton7ActionPerformed
        try {
            modele.mod2();
        } catch (FileNotFoundException ex) {
            Logger.getLogger(Vue.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(Vue.class.getName()).log(Level.SEVERE, null, ex);
        }

    }

    private void jList1ValueChanged(javax.swing.event.ListSelectionEvent evt) {//GEN-FIRST:event_jList1ValueChanged
        jList1.addListSelectionListener(new ListSelectionListener() {
            @Override
            public void valueChanged(ListSelectionEvent e) {
                if (!e.getValueIsAdjusting() && jList1.getSelectedValue() != null) {
                    String path = (jList1.getSelectedValue().toString());
                    //System.out.println("aquiii= " + path);

                    ImageIcon img = new ImageIcon(path);
                    jLabel3.setIcon(img);
                    jLabel3.setVisible(true);
//SE imagem for alterada e nao trocado o nome do txt ela nao aparece no JLabel
                }
            }
        });
    }//GEN-LAST:event_jList1ValueChanged

    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 ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(Vue.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Vue.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Vue.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Vue.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        //Create and display the form 
        java.awt.EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                new Vue().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JButton jButton3;
    private javax.swing.JButton jButton4;
    private javax.swing.JButton jButton5;
    private javax.swing.JButton jButton6;
    private javax.swing.JButton jButton7;
    private javax.swing.JButton jButton8;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JLabel jLabel6;
    private javax.swing.JList jList1;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JSeparator jSeparator1;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextField jTextField2;
    private javax.swing.JTextField jTextField3;
    // End of variables declaration//GEN-END:variables

    @Override
    public void update(Observable o, Object arg) {
        throw new UnsupportedOperationException("Not supported yet.");
    }
}

MODELO:
[code]

import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Observable;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.DefaultListModel;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class Modele extends Observable {

    public String adresse;
    public File arquivo;
    public FileReader fr;
    public BufferedWriter gravar;
    public BufferedReader br;
    //CREATION DE L'OBJET DU TYPE FENETRE JFileChooser
    JFileChooser fileChooser = new JFileChooser();
    public javax.swing.JButton jButton1;
    public javax.swing.JButton jButton2;
    public javax.swing.JButton jButton3;
    public javax.swing.JButton jButton4;
    public javax.swing.JButton jButton5;
    public javax.swing.JButton jButton6;
    public javax.swing.JButton jButton7;
    public javax.swing.JButton jButton8;
    public javax.swing.JLabel jLabel1;
    public javax.swing.JLabel jLabel2;
    public javax.swing.JLabel jLabel3;
    public javax.swing.JLabel jLabel4;
    public javax.swing.JLabel jLabel5;
    public javax.swing.JLabel jLabel6;
    public javax.swing.JList jList1;
    public javax.swing.JPanel jPanel1;
    public javax.swing.JScrollPane jScrollPane1;
    public javax.swing.JSeparator jSeparator1;
    public javax.swing.JTextField jTextField1;
    public javax.swing.JTextField jTextField2;
    public javax.swing.JTextField jTextField3;

    public String getAdresse() {
        return adresse;
    }

    public void setAdresse(String adresse) {
        this.adresse = adresse;
    }

    public File getArquivo() {
        return arquivo;
    }

    public void setArquivo(File arquivo) {
        this.arquivo = arquivo;
    }

    public FileReader getFileReader() {
        return fr;
    }

    public void setFileReader(FileReader fr) {
        this.fr = fr;
    }

    public BufferedWriter getBufferedWriter() {
        return gravar;
    }

    public void setBufferedWriter(BufferedWriter gravar) {
        this.gravar = gravar;
    }

    public BufferedReader getBufferedReader() {
        return br;
    }

    public void setBufferedReader(BufferedReader br) {
        this.br = br;
    }

    // *****************************************************
    public void rename(String novoNome) throws IOException {
        arquivo = new File(adresse);

        //File dir = new File(adresse);
        jTextField3.setText(novoNome);

        novoNome = jTextField3.getText().toLowerCase();

        String[] sp = arquivo.getName().split("\\.");
//FileReader fr = new FileReader("/Users/Veronica/workspacenetbeans/Visionneuse/mots.txt");  
        fr = new FileReader("/Users/Veronica/workspacenetbeans/Visionneuse/mots.txt");
//FileWriter gravar = new FileWriter(new File("/Users/Veronica/workspacenetbeans/Visionneuse/mots.txt"),true);
//BufferedWriter gravar = new BufferedWriter(new FileWriter("/Users/Veronica/workspacenetbeans/Visionneuse/mots.txt", true)); 
        gravar = new BufferedWriter(new FileWriter("/Users/Veronica/workspacenetbeans/Visionneuse/mots.txt", true));
//BufferedReader br = new BufferedReader(fr);   
        br = new BufferedReader(fr);
        String temp;
        List<String> lista2 = new ArrayList<String>();
        while ((temp = br.readLine()) != null) {
            //Aqui gera a sua "lista". No caso, imprimi cada linha na tela.     
            System.out.println("linhaa TEMP=" + temp);
            if (!temp.contains(jTextField2.getText())) {

                lista2.add(temp);
                System.out.println("*** NAO ALTERADO ***");
            }
        }
        String qqqq = lista2.toString();
        System.out.println("***LISTA = " + qqqq);

        gravar.write(qqqq.replace(",", "\n").replace(" ", "").replace("[", "").replace("]", ""));

        /*Duplicite l = new Duplicite("/Users/Veronica/workspacenetbeans/Visionneuse/mots.txt");
         l.lerTexto();
         System.out.println("CONCLUIDO...");*/

        gravar.close();

        if (!jTextField3.getText().isEmpty()) {
            if (arquivo.isFile() == true) {
                arquivo.renameTo(new File(arquivo.getParent() + "\\" + novoNome + "." + sp[1]));
                String nouveau1 = arquivo.getParent() + "\\" + novoNome + "." + sp[1].toString();
                jTextField2.setText(nouveau1);
                //jTextField2.setText(dir.getAbsolutePath());

            } else {
                arquivo.renameTo(new File(arquivo.getParent() + "\\" + novoNome));
            }
        } else {
            jLabel5.setText("Informar Novo Nome");
        }
        setChanged();
        notifyObservers();
    }

    public void fichier() throws FileNotFoundException, IOException {
        arquivo = new File("/Users/Veronica/workspacenetbeans/Visionneuse/mots.txt");

        //Se o arquivo não existir no diretório passado, ele cria um novo arquivo.   
        if (!arquivo.exists()) {
            try {
                arquivo.createNewFile();
            } catch (IOException e) {
                System.out.println("Não foi possível criar o arquivo. Motivo: " + e.getMessage());
                e.printStackTrace();
            }
        }

        String texto = jTextField1.getText().toUpperCase();
        if (!jTextField1.getText().isEmpty()) {
            try {
                //Objeto que irá escrever no seu TXT  
                // BufferedWriter escritor = new BufferedWriter(new FileWriter(arquivo, true));  
                gravar = new BufferedWriter(new FileWriter(arquivo, true));

                //Pega do sistema a quebra de linha (Muda de Sistema para Sistema)  
                String quebraDeLinha = System.getProperty("line.separator");

                //Escreve No arquivo sem apagar o que já contem nele.  
                gravar.write(jTextField2.getText() + "<>" + texto + "<>" + quebraDeLinha);
                //escritor.write(jTextField2.getText()+"<>"+texto+"<>"+quebraDeLinha); 
                //Fecha o arquivo (Muito importante sempre fechar depois de usá-lo).  
                //escritor.close();
                gravar.close();

            } catch (IOException e) {
                System.out.println("Erro ao gravar no arquivo txt. Motivo: " + e.getMessage());
                e.printStackTrace();
            }
        } else {
            jLabel6.setText("Informar Mot Cle");
        }
    }

//Procurar Mot cle SOMENTE
    public String mod2() throws FileNotFoundException, IOException {
        String ende;
        String returnar = null;
        List<String> lista = new ArrayList<String>();
        try {

            //abre o arquivo     
            //FileReader fr = new FileReader("/Users/Veronica/workspacenetbeans/Visionneuse/mots.txt");     
            fr = new FileReader("/Users/Veronica/workspacenetbeans/Visionneuse/mots.txt");

            // FileWriter gravar = new FileWriter(new File("/Users/Veronica/workspacenetbeans/Visionneuse/mots.txt"),true);
            //BufferedWriter escritor = new BufferedWriter(new FileWriter("/Users/Veronica/workspacenetbeans/Visionneuse/mots.txt", true)); 
            gravar = new BufferedWriter(new FileWriter("/Users/Veronica/workspacenetbeans/Visionneuse/mots.txt", true));

            //BufferedReader br = new BufferedReader(fr);    
            br = new BufferedReader(fr);
            String temp;
            //A cada interação, é uma linha do arquivo e atribui-a a temp     

            while ((temp = br.readLine()) != null) {
                //Aqui gera a sua "lista". No caso, imprimi cada linha na tela.     
                System.out.println("linhaa TEMP=" + temp);
                String[] a = temp.split("<>");
                for (String each : a) {
                    {

                        String editTextUpper = jTextField1.getText().toUpperCase();
                        String eachUpper = each.toUpperCase();

// Não deveria ser o inverso?  
                        if (editTextUpper.contains(eachUpper)) {

                            ende = temp;
                            ende = ende.replaceAll("\\<>[^)]*\\<>", "");
                            //System.out.println("add imagem="+ende); 
                            lista.add(ende);
                        }
                    }
                    System.out.println("ffff=" + each);
                    returnar = each;
                }

            }
            System.out.println("lista = " + lista);

            DefaultListModel model = new DefaultListModel();
            for (String s : lista) {
                jList1.setModel(model);
                model.addElement(s);
            }
        } catch (FileNotFoundException el) {
            System.out.println("Arquivo não Encontrado!");
        } catch (IOException e) {
            e.printStackTrace();
        }
        setChanged();
        notifyObservers();
        return returnar;
    }

    public void imagemm() {
        jButton4.setEnabled(true);
        jButton5.setEnabled(true);
        jButton6.setEnabled(true);
        jButton7.setEnabled(true);
        fileChooser.setDialogTitle("Escolha a Imagem");  //Define o título do JFileChooser  
        fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);  //Define que só serão abertos arquivos  

        ExtensionFileFilter filter = new ExtensionFileFilter();
// criar o filtro
        filter.addExtension("jpg", true);
// adicionar extensao
        filter.addExtension("gif", true);
// adicionar extensao
        filter.setDescription("");
// deixar descricao do filtro em branco
        fileChooser.setFileFilter(filter);
// adiciobar filtro

        fileChooser.setAcceptAllFileFilterUsed(false);
// Impede seleções múltiplas.  
        fileChooser.setMultiSelectionEnabled(false);
        Vue vue = null;
        jLabel3.setVisible(true);
        if (fileChooser.showOpenDialog(vue) == JFileChooser.APPROVE_OPTION) {
            arquivo = fileChooser.getSelectedFile();//arquivo 

            jTextField2.setText(arquivo.getAbsolutePath());
            adresse = arquivo.getAbsolutePath();
            BufferedImage bi = null;
            try {
                bi = ImageIO.read(arquivo); //carrega a imagem real num buffer
            } catch (IOException ex) {
                Logger.getLogger(Vue.class.getName()).log(Level.SEVERE, null, ex);
            }

            BufferedImage aux = new BufferedImage(340, 140, bi.getType());//cria um buffer auxiliar com o tamanho desejado  
            Graphics2D g = aux.createGraphics();//pega a classe graphics do aux para edicao  
            AffineTransform at = AffineTransform.getScaleInstance((double) 340 / bi.getWidth(), (double) 140 / bi.getHeight());//cria a transformacao  
            g.drawRenderedImage(bi, at);//pinta e transforma a imagem real no auxiliar  
            jLabel3.setIcon(new ImageIcon(aux));//seta no jlabel      } 
            setChanged();
            notifyObservers();
        }
    }
}

CONTROLADOR:

[code]

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Controleur implements ActionListener {
    
    Modele modele;
    Vue vue;
    
    Controleur(Modele modele, Vue vue) {
        this.modele = modele;
        this.vue = vue;
        vue.addListenersToView(this);
    }
    
    @Override
    public void actionPerformed(ActionEvent evt) {
        //if (evt.getSource() == vue.trace) modele.setExiste(true);
        //else if (evt.getSource() == vue.efface ) modele.setExiste(false);
        modele.imagemm();
              
    }
}