bonjour
j arrive pas à créer mon fichier et voir mes données saisies !!!

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/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
 
/*
 * Draw_window.java
 *
 * Created on 21 févr. 2011, 20:09:41
 */
package transformertoxml;
// import transformertoxml.Xml_File.*;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JComboBox.*;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.output.Format;
import org.jdom.output.XMLOutputter;
 
/**
 *
 * @author Nahla
 */
public class Draw_window extends javax.swing.JFrame {
 
    /** Creates new form Draw_window */
    public Draw_window() {
        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() {
        bindingGroup = new org.jdesktop.beansbinding.BindingGroup();
 
        jLabel1 = new javax.swing.JLabel();
        class_var = new javax.swing.JTextField();
        add_att = new javax.swing.JButton();
        jLabel3 = new javax.swing.JLabel();
        add_class = new javax.swing.JButton();
        jLabel4 = new javax.swing.JLabel();
        jScrollPane1 = new javax.swing.JScrollPane();
        affich1 = new javax.swing.JTextArea();
        att_var = new javax.swing.JTextField();
        method = new javax.swing.JTextField();
        add_meth = new javax.swing.JButton();
        acces_class = new javax.swing.JComboBox();
        class_container = new javax.swing.JComboBox();
        jLabel20 = new javax.swing.JLabel();
        jLabel21 = new javax.swing.JLabel();
        jLabel22 = new javax.swing.JLabel();
        class_value = new javax.swing.JComboBox();
        jLabel26 = new javax.swing.JLabel();
        acces_att = new javax.swing.JComboBox();
        jLabel27 = new javax.swing.JLabel();
        acces_meth = new javax.swing.JComboBox();
        jLabel28 = new javax.swing.JLabel();
        type_meth = new javax.swing.JComboBox();
        jLabel29 = new javax.swing.JLabel();
        type_att = new javax.swing.JComboBox();
        jLabel2 = new javax.swing.JLabel();
        jLabel5 = new javax.swing.JLabel();
        fromClass = new javax.swing.JComboBox();
        toClass = new javax.swing.JComboBox();
        jLabel10 = new javax.swing.JLabel();
        jLabel6 = new javax.swing.JLabel();
        cardFrom = new javax.swing.JComboBox();
        jLabel11 = new javax.swing.JLabel();
        cardTo = new javax.swing.JComboBox();
        jLabel13 = new javax.swing.JLabel();
        action = new javax.swing.JTextField();
        btnExport = new javax.swing.JButton();
        classType = new javax.swing.JComboBox();
        jLabel23 = new javax.swing.JLabel();
        add_meth1 = new javax.swing.JButton();
        typeCard = new javax.swing.JComboBox();
        jLabel7 = new javax.swing.JLabel();
        jLabel30 = new javax.swing.JLabel();
        menuBar = new javax.swing.JMenuBar();
        fileMenu = new javax.swing.JMenu();
        openMenuItem = new javax.swing.JMenuItem();
        saveMenuItem = new javax.swing.JMenuItem();
        saveAsMenuItem = new javax.swing.JMenuItem();
        exitMenuItem = new javax.swing.JMenuItem();
        editMenu = new javax.swing.JMenu();
        cutMenuItem = new javax.swing.JMenuItem();
        copyMenuItem = new javax.swing.JMenuItem();
        pasteMenuItem = new javax.swing.JMenuItem();
        deleteMenuItem = new javax.swing.JMenuItem();
        helpMenu = new javax.swing.JMenu();
        contentsMenuItem = new javax.swing.JMenuItem();
        aboutMenuItem = new javax.swing.JMenuItem();
 
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowOpened(java.awt.event.WindowEvent evt) {
                formWindowOpened(evt);
            }
        });
 
        jLabel1.setText("1.Class name");
 
        class_var.setText(" ");
        class_var.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                class_varActionPerformed(evt);
            }
        });
 
        add_att.setText("Add");
        add_att.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                add_attActionPerformed(evt);
            }
        });
 
        jLabel3.setText("3. Attribut");
 
        add_class.setText("Add");
        add_class.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                add_classActionPerformed(evt);
            }
        });
 
        jLabel4.setText("4. Method");
 
        affich1.setColumns(20);
        affich1.setRows(5);
        affich1.setMargin(new java.awt.Insets(5, 5, 5, 5));
        jScrollPane1.setViewportView(affich1);
 
        att_var.setText(" ");
        att_var.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                att_varActionPerformed(evt);
            }
        });
 
        method.setText(" ");
        method.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                methodActionPerformed(evt);
            }
        });
 
        add_meth.setText("Add");
        add_meth.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                add_methActionPerformed(evt);
            }
        });
 
        acces_class.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "public", "private", "protected" }));
 
        org.jdesktop.beansbinding.Binding binding = org.jdesktop.beansbinding.Bindings.createAutoBinding(org.jdesktop.beansbinding.AutoBinding.UpdateStrategy.READ_WRITE, acces_class, org.jdesktop.beansbinding.ObjectProperty.create(), acces_class, org.jdesktop.beansbinding.BeanProperty.create("elements"));
        bindingGroup.addBinding(binding);
        binding = org.jdesktop.beansbinding.Bindings.createAutoBinding(org.jdesktop.beansbinding.AutoBinding.UpdateStrategy.READ_WRITE, acces_class, org.jdesktop.beansbinding.ObjectProperty.create(), acces_class, org.jdesktop.beansbinding.BeanProperty.create("selectedItem"));
        bindingGroup.addBinding(binding);
 
        acces_class.addItemListener(new java.awt.event.ItemListener() {
            public void itemStateChanged(java.awt.event.ItemEvent evt) {
                acces_classItemStateChanged(evt);
            }
        });
        acces_class.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                acces_classActionPerformed(evt);
            }
        });
 
        class_container.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "extends", "implements", "          " }));
        class_container.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                class_containerActionPerformed(evt);
            }
        });
 
        jLabel20.setForeground(new java.awt.Color(102, 0, 102));
        jLabel20.setText("Access control  class");
 
        jLabel21.setForeground(new java.awt.Color(102, 0, 102));
        jLabel21.setText("Container");
 
        jLabel22.setForeground(new java.awt.Color(102, 0, 102));
        jLabel22.setText("Container value");
 
        class_value.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Item 1", "Item 2", "Item 3", "Item 4" }));
 
        jLabel26.setForeground(new java.awt.Color(102, 0, 102));
        jLabel26.setText("Access control  attribut");
 
        acces_att.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "public", "private", "protected" }));
        acces_att.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                acces_attActionPerformed(evt);
            }
        });
 
        jLabel27.setForeground(new java.awt.Color(102, 0, 102));
        jLabel27.setText("Access control method");
 
        acces_meth.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "public", "private", "protected" }));
        acces_meth.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                acces_methActionPerformed(evt);
            }
        });
 
        jLabel28.setForeground(new java.awt.Color(102, 0, 102));
        jLabel28.setText("Type method");
 
        type_meth.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "void", "boolean", "byte", "char", "double", "float", "int", "long", "String", "short" }));
        type_meth.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                type_methActionPerformed(evt);
            }
        });
 
        jLabel29.setForeground(new java.awt.Color(102, 0, 102));
        jLabel29.setText("Type attribut");
 
        type_att.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "boolean", "byte", "char", "double", "float", "int", "long", "String", "short" }));
        type_att.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                type_attActionPerformed(evt);
            }
        });
 
        jLabel2.setText("* les relations & les associations");
 
        jLabel5.setText("From");
 
        jLabel10.setText("To");
 
        jLabel6.setText("Cardinality");
 
        cardFrom.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "0", "1", "n" }));
 
        jLabel11.setText("To");
 
        cardTo.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "0", "1", "n" }));
 
        jLabel13.setText("Action");
 
        btnExport.setText("Exporter");
        btnExport.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnExportActionPerformed(evt);
            }
        });
 
        classType.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Class", "Interface" }));
 
        jLabel23.setForeground(new java.awt.Color(102, 0, 102));
        jLabel23.setText("Type");
 
        add_meth1.setText("Add");
        add_meth1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                add_meth1ActionPerformed(evt);
            }
        });
 
        typeCard.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Navigation", "Association", "Composition", "Dependency", "Agregation", "Generalisation" }));
 
        jLabel7.setText("Type");
 
        jLabel30.setForeground(new java.awt.Color(102, 0, 102));
        jLabel30.setText("Access control  method");
 
        fileMenu.setText("File");
 
        openMenuItem.setText("Open");
        fileMenu.add(openMenuItem);
 
        saveMenuItem.setText("Save");
        fileMenu.add(saveMenuItem);
 
        saveAsMenuItem.setText("Save As ...");
        fileMenu.add(saveAsMenuItem);
 
        exitMenuItem.setText("Exit");
        exitMenuItem.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                exitMenuItemActionPerformed(evt);
            }
        });
        fileMenu.add(exitMenuItem);
 
        menuBar.add(fileMenu);
 
        editMenu.setText("Edit");
 
        cutMenuItem.setText("Cut");
        editMenu.add(cutMenuItem);
 
        copyMenuItem.setText("Copy");
        editMenu.add(copyMenuItem);
 
        pasteMenuItem.setText("Paste");
        editMenu.add(pasteMenuItem);
 
        deleteMenuItem.setText("Delete");
        editMenu.add(deleteMenuItem);
 
        menuBar.add(editMenu);
 
        helpMenu.setText("Help");
 
        contentsMenuItem.setText("Contents");
        helpMenu.add(contentsMenuItem);
 
        aboutMenuItem.setText("About");
        helpMenu.add(aboutMenuItem);
 
        menuBar.add(helpMenu);
 
        setJMenuBar(menuBar);
 
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(btnExport)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                                        .addGap(9, 9, 9)
                                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                            .addGroup(layout.createSequentialGroup()
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                                    .addComponent(jLabel6)
                                                    .addComponent(jLabel13, javax.swing.GroupLayout.PREFERRED_SIZE, 43, javax.swing.GroupLayout.PREFERRED_SIZE))
                                                .addGap(31, 31, 31)
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                                    .addGroup(layout.createSequentialGroup()
                                                        .addComponent(cardFrom, 0, 45, Short.MAX_VALUE)
                                                        .addGap(78, 78, 78)
                                                        .addComponent(jLabel11, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                                                    .addGroup(layout.createSequentialGroup()
                                                        .addComponent(action, javax.swing.GroupLayout.PREFERRED_SIZE, 125, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED))))
                                            .addGroup(layout.createSequentialGroup()
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                                    .addComponent(jLabel7)
                                                    .addComponent(jLabel5))
                                                .addGap(18, 18, 18)
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                                    .addComponent(typeCard, javax.swing.GroupLayout.PREFERRED_SIZE, 142, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                    .addComponent(fromClass, javax.swing.GroupLayout.PREFERRED_SIZE, 142, javax.swing.GroupLayout.PREFERRED_SIZE))
                                                .addGap(34, 34, 34)))
                                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                            .addGroup(layout.createSequentialGroup()
                                                .addGap(12, 12, 12)
                                                .addComponent(cardTo, javax.swing.GroupLayout.PREFERRED_SIZE, 54, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 127, Short.MAX_VALUE)
                                                .addComponent(add_meth1, javax.swing.GroupLayout.PREFERRED_SIZE, 61, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                .addGap(75, 75, 75))
                                            .addGroup(layout.createSequentialGroup()
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                                .addComponent(jLabel10, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                                .addComponent(toClass, javax.swing.GroupLayout.PREFERRED_SIZE, 147, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 81, Short.MAX_VALUE))))
                                    .addGroup(layout.createSequentialGroup()
                                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                            .addGroup(layout.createSequentialGroup()
                                                .addComponent(jLabel4)
                                                .addGap(18, 18, 18)
                                                .addComponent(method, javax.swing.GroupLayout.DEFAULT_SIZE, 143, Short.MAX_VALUE))
                                            .addGroup(layout.createSequentialGroup()
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                                                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                                                        .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 75, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                                        .addComponent(class_var))
                                                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                                                        .addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 57, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                                        .addComponent(att_var, javax.swing.GroupLayout.PREFERRED_SIZE, 137, javax.swing.GroupLayout.PREFERRED_SIZE)))
                                                .addGap(6, 6, 6)))
                                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                            .addComponent(jLabel20)
                                            .addGroup(layout.createSequentialGroup()
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                                                        .addGroup(layout.createSequentialGroup()
                                                            .addComponent(jLabel28, javax.swing.GroupLayout.PREFERRED_SIZE, 65, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                                            .addComponent(jLabel27, javax.swing.GroupLayout.PREFERRED_SIZE, 0, javax.swing.GroupLayout.PREFERRED_SIZE))
                                                        .addComponent(jLabel26))
                                                    .addComponent(jLabel29, javax.swing.GroupLayout.PREFERRED_SIZE, 65, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                    .addComponent(jLabel30))
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                                    .addComponent(type_att, 0, 101, Short.MAX_VALUE)
                                                    .addComponent(acces_att, 0, 101, Short.MAX_VALUE)
                                                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                                        .addComponent(acces_meth, 0, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                                        .addComponent(acces_class, 0, 101, Short.MAX_VALUE)
                                                        .addComponent(classType, 0, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                                        .addComponent(class_container, 0, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                                        .addComponent(class_value, 0, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                                                    .addComponent(type_meth, 0, 101, Short.MAX_VALUE)))
                                            .addComponent(jLabel23)
                                            .addComponent(jLabel21, javax.swing.GroupLayout.PREFERRED_SIZE, 65, javax.swing.GroupLayout.PREFERRED_SIZE)
                                            .addComponent(jLabel22, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE))
                                        .addGap(18, 18, 18)
                                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                            .addComponent(add_att)
                                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                                .addGroup(layout.createSequentialGroup()
                                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                                    .addComponent(add_meth)
                                                    .addGap(57, 57, 57))
                                                .addComponent(add_class)))))
                                .addGap(6, 6, 6))
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(jLabel2)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 633, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addGap(45, 45, 45))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 438, Short.MAX_VALUE)
                        .addGap(18, 18, 18)
                        .addComponent(btnExport))
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addGap(32, 32, 32)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                    .addComponent(class_var, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addComponent(jLabel23)
                                    .addComponent(jLabel1))
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(jLabel21)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                .addComponent(jLabel22))
                            .addGroup(layout.createSequentialGroup()
                                .addContainerGap()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                    .addComponent(jLabel20)
                                    .addComponent(acces_class, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(classType, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(class_container, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(class_value, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addGroup(layout.createSequentialGroup()
                                .addGap(48, 48, 48)
                                .addComponent(add_class)))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addGroup(layout.createSequentialGroup()
                                        .addGap(31, 31, 31)
                                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                            .addComponent(jLabel26)
                                            .addComponent(acces_att, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                            .addComponent(type_att, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                            .addComponent(jLabel29)))
                                    .addGroup(layout.createSequentialGroup()
                                        .addGap(39, 39, 39)
                                        .addComponent(add_att)))
                                .addGap(7, 7, 7)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addGroup(layout.createSequentialGroup()
                                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                            .addGroup(layout.createSequentialGroup()
                                                .addGap(12, 12, 12)
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                                    .addComponent(jLabel4)
                                                    .addComponent(method, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                                            .addGroup(layout.createSequentialGroup()
                                                .addGap(11, 11, 11)
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                                    .addComponent(acces_meth, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                    .addComponent(jLabel30))))
                                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                            .addComponent(jLabel27)
                                            .addComponent(jLabel28)
                                            .addComponent(type_meth, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                                    .addGroup(layout.createSequentialGroup()
                                        .addGap(22, 22, 22)
                                        .addComponent(add_meth))))
                            .addGroup(layout.createSequentialGroup()
                                .addGap(28, 28, 28)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                    .addComponent(jLabel3)
                                    .addComponent(att_var, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))))
                        .addGap(8, 8, 8)
                        .addComponent(jLabel2)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(typeCard, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabel7))
                        .addGap(8, 8, 8)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(fromClass, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(toClass, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabel10)
                            .addComponent(jLabel5))
                        .addGap(18, 18, 18)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel6)
                            .addComponent(cardFrom, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabel11)
                            .addComponent(cardTo, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(add_meth1))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel13)
                            .addComponent(action, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))))
                .addContainerGap())
        );
 
        acces_class.getAccessibleContext().setAccessibleParent(acces_class);
 
        bindingGroup.bind();
 
        pack();
    }// </editor-fold>
 
    private void exitMenuItemActionPerformed(java.awt.event.ActionEvent evt) {                                             
        System.exit(0);
    }                                            
 
    private void class_varActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        String enter = class_var.getText();  // e
 
    }                                         
 
    private void add_classActionPerformed(java.awt.event.ActionEvent evt) {                                          
        ///////////////////////
        Classe classe = new Classe();
        classe.attributs = new ArrayList<Attribut>();
        classe.methodes = new ArrayList<Methode>();
        classe.nom = class_var.getText();
        classe.accessControl = (String) acces_class.getSelectedItem();
        classe.container = (String) class_container.getSelectedItem();
        classe.containerValue = (String) class_value.getSelectedItem();
        indexClasses++;
        classe.id = String.valueOf(indexClasses + 1);
        classes.add(classe);
 
        ////////////////////
        // TODO add your handling code here:
        String sortie1 = null;
        sortie1 = class_var.getText();
 
        // liste class acces
        String class_slected = "";
        class_slected = class_slected + acces_class.getSelectedItem().toString();
        // liste container
        String container_slected = "";
        container_slected = container_slected + class_container.getSelectedItem().toString();
        String vide = (String) class_container.getSelectedItem();
        //affichage
        if (vide == null) {
            container_slected = "aucun";
            affich1.append("Class name : " + sortie1 + " \n Acces control class :" + class_slected + "\nContainer :" + container_slected);
        } else {
            affich1.append("class name : " + sortie1 + " \n acces control class :" + class_slected + "\ncontainer :" + container_slected);
        }
        // affich1.
        affich1.setEditable(false);
 
        recharger();
    }                                         
    /**
     * 
     */
    public void recharger() {
        fromClass.removeAllItems();
        toClass.removeAllItems();
        for (int i = 0; i < classes.size(); i++) {
            fromClass.addItem(classes.get(i).nom);
            toClass.addItem(classes.get(i).nom);
        }
    }
    private void att_varActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        String attribut = att_var.getText(); // recuperer valeur de attribut saisi
 
 
}                                       
 
    private void add_attActionPerformed(java.awt.event.ActionEvent evt) {                                        
 
        //////////////////////
        Attribut attribut = new Attribut();
        attribut.accesControl = (String) acces_att.getSelectedItem();
        attribut.typeAttribut = (String) type_att.getSelectedItem();
        classes.get(indexClasses).attributs.add(attribut);
        /////////////////////
 
        // TODO add your handling code here:
        // nom d class saisi
        String sortie1 = null;
        sortie1 = att_var.getText();
        // liste attribut acces
        String att_slected = "";
        att_slected = att_slected + acces_att.getSelectedItem().toString();
        // type attribut
        String type_att_slected = "";
        type_att_slected = type_att_slected + type_att.getSelectedItem().toString();
        /*
        //affichage
        affich1.append("Attribut : "+ sortie1+ " \n acces control class :"+class_slected+"\ncontainer :"+container_slected);
 
        affich1.setEditable(false);
         * */
        affich1.append("\nAttribut: " + sortie1 + "\nAcces control attribut: " + att_slected + "\nType attribut: " + type_att_slected);
        affich1.setEditable(false);
    }                                       
 
    private void methodActionPerformed(java.awt.event.ActionEvent evt) {                                       
        // TODO add your handling code here:
        String enter3 = method.getText();
    }                                      
 
    private void add_methActionPerformed(java.awt.event.ActionEvent evt) {                                         
 
        //////////////////////
        Methode methode = new Methode();
        methode.accesControl = (String) acces_meth.getSelectedItem();
        methode.typeMethode = (String) type_meth.getSelectedItem();
        classes.get(indexClasses).methodes.add(methode);
        /////////////////////
 
 
        // TODO add your handling code here:
        // nom methode saisi
        String sortie1 = null;
        sortie1 = method.getText();
        // acces method
        String method_slected = "";
        method_slected = method_slected + acces_meth.getSelectedItem().toString();
        // recuperer type methode ( valeur de retour)
        String type_meth_slected = "";
        type_meth_slected = type_meth_slected + type_meth.getSelectedItem().toString();
        //
        affich1.append("\nMethod name:" + sortie1 + "\nAcces control method: " + method_slected + "\nType method: " + type_meth_slected);
    }                                        
 
    private void acces_attActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        String att_slected = "";
        // att_slected =
}                                         
 
    private void acces_classActionPerformed(java.awt.event.ActionEvent evt) {                                            
        // TODO add your handling code here:
        // access_class.addItem("");
 
        // acces_class.addItem(possibleValues);
        String class_slected = "";
        class_slected = class_slected + acces_class.getSelectedItem().toString();
 
 
    }                                           
    // recupere cet element
    // String str = (String)combo.getSelectedItem();
    // recuperer tout les Jcombobox
 
    // public String getAccess_class(){return (String) acces_class  ;}
    private void acces_classItemStateChanged(java.awt.event.ItemEvent evt) {                                             
        // TODO add your handling code here:
        // String str_class = (String) access_class.getSlectedItem();
    }                                            
 
    private void class_containerActionPerformed(java.awt.event.ActionEvent evt) {                                                
        // TODO add your handling code here:
 
        String container_slected = "";
        container_slected = container_slected + class_container.getSelectedItem().toString();
}                                               
 
    private void type_attActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        // recuperer valeur selctionée
        String type_att_slected = "";
        type_att_slected = type_att_slected + type_att.getSelectedItem().toString();
    }                                        
 
    private void acces_methActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
        String method_slected = "";
        method_slected = method_slected + acces_meth.getSelectedItem().toString();
    }                                          
 
    private void type_methActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        // recuperer type methode ( valeur de retour)
        String type_meth_slected = "";
        type_meth_slected = type_meth_slected + type_meth.getSelectedItem().toString();
    }                                         
 
    private void btnExportActionPerformed(java.awt.event.ActionEvent evt) {                                          
 
        try {
//l'element root du document xml
            Element root = new Element("Diagram");
            root.setAttribute("name", "Diagramme_Test");
            Document doc = new Document(root);
            Element nodeClasses = new Element("classes");
            for (int i = 0; i < classes.size(); i++) {
                //un noeud classe
                Element nodeClass = new Element("classe");
                nodeClass.setAttribute("id", classes.get(i).id);
                nodeClass.setAttribute("name", classes.get(i).nom);
 
                nodeClass.setAttribute("access", classes.get(i).accessControl);
                nodeClass.setAttribute("container", classes.get(i).container);
                nodeClass.setAttribute("containerValue", classes.get(i).containerValue);
                // Ajouter les attributs
                if (classes.get(i).attributs.size() > 0) {
                    Element nodeAttributs = new Element("attributs");
                    for (int j = 0; j < classes.get(i).attributs.size(); j++) {
                        //un noeud classe
                        Element nodeAttribut = new Element("attribut");
                        nodeAttribut.setAttribute("access", classes.get(i).attributs.get(j).accesControl);
                        nodeAttribut.setAttribute("type", classes.get(i).attributs.get(j).typeAttribut);
                        nodeAttributs.addContent(nodeAttribut);
                    }
                    nodeClass.addContent(nodeAttributs);
                }
                // Ajouter les méthodes
                if (classes.get(i).methodes.size() > 0) {
                    Element nodeMethodes = new Element("methodes");
                    for (int j = 0; j < classes.get(i).methodes.size(); j++) {
                        //un noeud classe
                        Element nodeMethode = new Element("methode");
                        nodeMethode.setAttribute("accessControl", classes.get(i).methodes.get(j).accesControl);
                        nodeMethode.setAttribute("type", classes.get(i).methodes.get(j).typeMethode);
                        nodeMethodes.addContent(nodeMethode);
                    }
                    nodeClass.addContent(nodeMethodes);
                }
                nodeClasses.addContent(nodeClass);
                root.addContent(nodeClasses);
            }
            if (cardinalites.size() > 0) {
                Element nodeCardinalites = new Element("cardinalites");
                for (int i = 0; i < cardinalites.size(); i++) {
                    Element nodeCardinalite = new Element("relation");
 
                    nodeCardinalite.setAttribute("type", cardinalites.get(i).type);
                    nodeCardinalite.setAttribute("start", cardinalites.get(i).cardinalityFrom);
                    nodeCardinalite.setAttribute("end", cardinalites.get(i).cardinalityTo);
                    nodeCardinalite.setAttribute("action", cardinalites.get(i).action);
                    Element nodeSource = new Element("source");
                    nodeSource.setAttribute("reference", cardinalites.get(i).fromClass);
                    Element nodeTarget = new Element("target");
                    nodeTarget.setAttribute("reference", cardinalites.get(i).fromClass);
 
                    nodeCardinalite.addContent(nodeSource);
                    nodeCardinalite.addContent(nodeTarget);
                    nodeCardinalites.addContent(nodeCardinalite);
 
                }
                root.addContent(nodeCardinalites);
            }
            enregistre("Diagramme_Test.xml", doc);
 
        } catch (Throwable e) {
            e.printStackTrace();
        }
 
    }                                         
 
    /**
     * 
     * @param fichier
     * @param document
     */
    void enregistre(String fichier, Document document) {
        try {
            //On utilise ici un affichage classique avec getPrettyFormat()
            XMLOutputter sortie = new XMLOutputter(Format.getPrettyFormat());
            //Remarquez qu'il suffit simplement de créer une instance de FileOutputStream
            //avec en argument le nom du fichier pour effectuer la sérialisation.
            sortie.output(document, new FileOutputStream(fichier));
        } catch (java.io.IOException e) {
        }
    }
 
    private void formWindowOpened(java.awt.event.WindowEvent evt) {                                  
        classes = new ArrayList<Classe>();
        cardinalites = new ArrayList<Cardinalite>();
    }                                 
 
    private void add_meth1ActionPerformed(java.awt.event.ActionEvent evt) {                                          
        Cardinalite cardinalite = new Cardinalite();
        cardinalite.fromClass = (String) fromClass.getSelectedItem();
        cardinalite.toClass = (String) toClass.getSelectedItem();
        cardinalite.cardinalityFrom = (String) cardFrom.getSelectedItem();
        cardinalite.cardinalityTo = (String) cardTo.getSelectedItem();
        cardinalite.type = (String) typeCard.getSelectedItem();
        cardinalite.action = action.getText();
        cardinalites.add(cardinalite);
    }                                         
 
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
 
            public void run() {
                new Draw_window().setVisible(true);
            }
        });
    }
    List <Classe> classes;
    List <Cardinalite> cardinalites;
    int indexClasses = -1;
    int indexCardinalites = -1;
    // Variables declaration - do not modify
    private javax.swing.JMenuItem aboutMenuItem;
    private javax.swing.JComboBox acces_att;
    private javax.swing.JComboBox acces_class;
    private javax.swing.JComboBox acces_meth;
    private javax.swing.JTextField action;
    private javax.swing.JButton add_att;
    private javax.swing.JButton add_class;
    private javax.swing.JButton add_meth;
    private javax.swing.JButton add_meth1;
    private javax.swing.JTextArea affich1;
    private javax.swing.JTextField att_var;
    private javax.swing.JButton btnExport;
    private javax.swing.JComboBox cardFrom;
    private javax.swing.JComboBox cardTo;
    private javax.swing.JComboBox classType;
    private javax.swing.JComboBox class_container;
    private javax.swing.JComboBox class_value;
    private javax.swing.JTextField class_var;
    private javax.swing.JMenuItem contentsMenuItem;
    private javax.swing.JMenuItem copyMenuItem;
    private javax.swing.JMenuItem cutMenuItem;
    private javax.swing.JMenuItem deleteMenuItem;
    private javax.swing.JMenu editMenu;
    private javax.swing.JMenuItem exitMenuItem;
    private javax.swing.JMenu fileMenu;
    private javax.swing.JComboBox fromClass;
    private javax.swing.JMenu helpMenu;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel10;
    private javax.swing.JLabel jLabel11;
    private javax.swing.JLabel jLabel13;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel20;
    private javax.swing.JLabel jLabel21;
    private javax.swing.JLabel jLabel22;
    private javax.swing.JLabel jLabel23;
    private javax.swing.JLabel jLabel26;
    private javax.swing.JLabel jLabel27;
    private javax.swing.JLabel jLabel28;
    private javax.swing.JLabel jLabel29;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel30;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JLabel jLabel6;
    private javax.swing.JLabel jLabel7;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JMenuBar menuBar;
    private javax.swing.JTextField method;
    private javax.swing.JMenuItem openMenuItem;
    private javax.swing.JMenuItem pasteMenuItem;
    private javax.swing.JMenuItem saveAsMenuItem;
    private javax.swing.JMenuItem saveMenuItem;
    private javax.swing.JComboBox toClass;
    private javax.swing.JComboBox typeCard;
    private javax.swing.JComboBox type_att;
    private javax.swing.JComboBox type_meth;
    private org.jdesktop.beansbinding.BindingGroup bindingGroup;
    // End of variables declaration
}
et l'erreur c' :
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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org.jdom.IllegalAddException: The Content already has an existing parent "Diagram"
        at org.jdom.ContentList.add(ContentList.java:209)
        at org.jdom.ContentList.add(ContentList.java:131)
        at java.util.AbstractList.add(AbstractList.java:91)
        at org.jdom.Element.addContent(Element.java:811)
        at transformertoxml.Draw_window.btnExportActionPerformed(Draw_window.java:770)
        at transformertoxml.Draw_window.access$1400(Draw_window.java:29)
        at transformertoxml.Draw_window$15.actionPerformed(Draw_window.java:259)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
        at java.awt.Component.processMouseEvent(Component.java:6216)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
        at java.awt.Component.processEvent(Component.java:5981)
        at java.awt.Container.processEvent(Container.java:2041)
        at java.awt.Component.dispatchEventImpl(Component.java:4583)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Component.dispatchEvent(Component.java:4413)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4556)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4220)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4150)
        at java.awt.Container.dispatchEventImpl(Container.java:2085)
        at java.awt.Window.dispatchEventImpl(Window.java:2475)
        at java.awt.Component.dispatchEvent(Component.java:4413)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)