Bonjour,

dans le cadre d'un cours nous devons réaliser une application permettant de dessiner des formes géométriques, cette partie étant réalisée nous devons pouvoir gérer plusieurs "tableaux", nous avons donc choisi d'utiliser des TabbedPane pour gérer plusieurs onglets et donc plusieurs tableaux.

Cependant lorsque l'on change d'onglet le contenu n'est pas sauvegardé et le tableau se resete à chaque changement d'onglet...

Ma question est donc : comment réussir à restituer le contenu du panel après avoir changé d'onglet ?

Merci =)

/*
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 * and open the template in the editor.
 */
/**
 *
 * @author Salome
 */

package javafxapplication1;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JPanel;
import java.awt.Graphics2D;

public class ProjetForme extends java.applet.Applet {

    /**
     * Initializes the applet ProjetForme
     */
    public void init() {
        try {
            java.awt.EventQueue.invokeAndWait(new Runnable() {
                public void run() {
                    initComponents();
                }
            });
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    /**
     * This method is called from within the init() method to initialize the
     * form. WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        groupe1 = new javax.swing.ButtonGroup();
        Quadrilatere = new javax.swing.JRadioButton();
        Triangle = new javax.swing.JRadioButton();
        Cercle = new javax.swing.JRadioButton();
        texte = new javax.swing.JLabel();
        PanelPrincipal = new javax.swing.JTabbedPane();
        tab1 = new javax.swing.JPanel();
        tab2 = new javax.swing.JPanel();
        Clear = new javax.swing.JButton();
        taillecercle = new javax.swing.JTextField();

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

        groupe1.add(Quadrilatere);
        Quadrilatere.setText("Quadrilatère");
        Quadrilatere.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                QuadrilatereActionPerformed(evt);
            }
        });
        add(Quadrilatere, new org.netbeans.lib.awtextra.AbsoluteConstraints(620, 70, -1, -1));

        groupe1.add(Triangle);
        Triangle.setText("Triangle");
        Triangle.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                TriangleActionPerformed(evt);
            }
        });
        add(Triangle, new org.netbeans.lib.awtextra.AbsoluteConstraints(620, 110, -1, -1));

        groupe1.add(Cercle);
        Cercle.setText("Cercle");
        Cercle.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                CercleActionPerformed(evt);
            }
        });
        add(Cercle, new org.netbeans.lib.awtextra.AbsoluteConstraints(620, 150, -1, -1));

        texte.setText("Forme");
        texte.setMaximumSize(new java.awt.Dimension(117, 48));
        texte.setMinimumSize(new java.awt.Dimension(117, 48));
        add(texte, new org.netbeans.lib.awtextra.AbsoluteConstraints(630, 10, 40, 40));

        PanelPrincipal.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                PanelPrincipalMouseClicked(evt);
            }
        });

        tab1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                tab1MouseClicked(evt);
            }
        });
        PanelPrincipal.addTab("1", tab1);

        tab2.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                tab2MouseClicked(evt);
            }
        });
        PanelPrincipal.addTab("2", tab2);

        add(PanelPrincipal, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 0, 580, 440));

        Clear.setText("Effacer Tableau");
        Clear.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                ClearActionPerformed(evt);
            }
        });
        add(Clear, new org.netbeans.lib.awtextra.AbsoluteConstraints(600, 390, 120, 40));

        taillecercle.setText("Rayon");
        add(taillecercle, new org.netbeans.lib.awtextra.AbsoluteConstraints(640, 180, -1, 30));
    }// </editor-fold>//GEN-END:initComponents

    private void QuadrilatereActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_QuadrilatereActionPerformed
            choixForme = 1;
    }//GEN-LAST:event_QuadrilatereActionPerformed

    private void TriangleActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_TriangleActionPerformed
            choixForme = 2;
    }//GEN-LAST:event_TriangleActionPerformed

    private void CercleActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_CercleActionPerformed
            choixForme = 3;
    }//GEN-LAST:event_CercleActionPerformed

    private int choixForme;
    private int coordX;
    private int coordY;
    private int[] pointsQuadriX = new int[4];
    private int[] pointsQuadriY = new int[4];
    private int[] pointsTriX = new int[3];
    private int[] pointsTriY = new int[3];
    private int[] pointsCercleX = new int [2];
    private int[] pointsCercleY = new int [2];
    private int r;
    private int rayon;
    private String recuperer;
    private int xCentre;
    private int yCentre;
    private int count = 0; 
    private int precedent;
    
    private void ClearMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_jButton1MouseClicked
    }//GEN-LAST:event_jButton1MouseClicked

    private void ClearActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_ClearActionPerformed
            clearpanel((JPanel)PanelPrincipal.getSelectedComponent());
            
    }//GEN-LAST:event_ClearActionPerformed

    private void PanelPrincipalMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_PanelPrincipalMouseClicked
     
    }//GEN-LAST:event_PanelPrincipalMouseClicked

    private void tab1MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_tab1MouseClicked
        coordX = evt.getX(); 
        coordY = evt.getY();        
       
        Graphics2D g = (Graphics2D) this.tab1.getGraphics();

        if(choixForme==1){

            if(count>3){
                 count = 0;
             } 
            pointsQuadriX[count] = coordX;
            pointsQuadriY[count] = coordY;
            System.out.println(count);
            if(count >= 1){
                g.drawLine(pointsQuadriX[precedent],pointsQuadriY[precedent],pointsQuadriX[count],pointsQuadriY[count]);
            }
            if(count == 3){
                g.drawLine(pointsQuadriX[3],pointsQuadriY[3],pointsQuadriX[0],pointsQuadriY[0]);
            }
            precedent = count;
            count = count+1;
        }
        
        else {
            if(choixForme==2){
                if(count>2){
                    count = 0;
                } 
            pointsTriX[count] = coordX;
            pointsTriY[count] = coordY;
            System.out.println(count);
            if(count >= 1){
                g.drawLine(pointsTriX[precedent],pointsTriY[precedent],pointsTriX[count],pointsTriY[count]);
            }
            if(count == 2){
                g.drawLine(pointsTriX[2],pointsTriY[2],pointsTriX[0],pointsTriY[0]);
            }
            precedent = count;
            count = count+1;    
            }
            
            else{
                recuperer = taillecercle.getText();
                rayon = Integer.parseInt(recuperer); 
                dessinerCercle(g, coordX, coordY, rayon);  // center (80,70) r=5
                
            }

        }  
    }//GEN-LAST:event_tab1MouseClicked

    private void tab2MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_tab2MouseClicked
        
    }//GEN-LAST:event_tab2MouseClicked

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JRadioButton Cercle;
    private javax.swing.JButton Clear;
    private javax.swing.JTabbedPane PanelPrincipal;
    private javax.swing.JRadioButton Quadrilatere;
    private javax.swing.JRadioButton Triangle;
    private javax.swing.ButtonGroup groupe1;
    private javax.swing.JPanel tab1;
    private javax.swing.JPanel tab2;
    private javax.swing.JTextField taillecercle;
    private javax.swing.JLabel texte;
    // End of variables declaration//GEN-END:variables

    private void clearpanel(JPanel p)
    {
        Graphics2D g=(Graphics2D) p.getGraphics();
        g.clearRect(0,0, p.getWidth(), p.getHeight());
    }

    public void dessinerCercle(Graphics g, int xCentre, int yCentre, int r) 
    {
        g.drawOval(xCentre-r, yCentre-r, 2*r, 2*r);
    }

}

Merci beaucoup !