Ajout d'un label sur clique bouton

**hugoclo** · 22/04/2014, 09h35

Bonjour,
Comme écris dans le texte j'essaye avec ce code de créer un label dynamiquement

Code :

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private int tu = 1;
private JLabel lbl;
   private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        String tutu = "tutu" + tu;
        lbl = new JLabel(tutu);
        pan.add(lbl);
        pan.validate();
tu++;
    }

pan est mon panel créé via netbeans.
Rien ne s'affiche.

**sebagot** · 22/04/2014, 12h13

Tu dois redessiner le panneau pour qu'il s'affiche

**hugoclo** · 24/04/2014, 10h31

Rien ni fais. J'ai voulu essayer avec autre chose(Jtable) même résultat : mon panel reste désespérément vide

Code :

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public class NewApplication extends javax.swing.JFrame {
private JLabel lbl;
private JTable table;
private JPanel panel;
    /**
     * Creates new form NewApplication
     */
    public NewApplication() {
        initComponents();
        panel = new JPanel();
         Object[][] data = {{"3","4","6","8"},{"5","6","7","8"}};
        String [] title = {"cell0","cell1","cell2","cell3"};
        table = new JTable( data,title);
        panel.add(table);
        this.getContentPane().add(new JScrollPane(panel), BorderLayout.CENTER);
 
    }
 
    /**
     * 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() {
 
        pan = new javax.swing.JPanel();
 
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
 
        javax.swing.GroupLayout panLayout = new javax.swing.GroupLayout(pan);
        pan.setLayout(panLayout);
        panLayout.setHorizontalGroup(
            panLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 216, Short.MAX_VALUE)
        );
        panLayout.setVerticalGroup(
            panLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 184, Short.MAX_VALUE)
        );
 
        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()
                .addGap(21, 21, 21)
                .addComponent(pan, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(163, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(22, 22, 22)
                .addComponent(pan, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(94, Short.MAX_VALUE))
        );
 
        pack();
    }// </editor-fold>                        
public class calculCellRenderer extends DefaultTableCellRenderer{
    public void calculCellRenderer(){
 
    }
    public Component getTableCellComponent(final JTable table,Object value,boolean isSelected,boolean hasFocus,int row,int col){
        setFocusable(true);
        setEnabled(true);
        setText(value.toString());
        float a = Float.valueOf(table.getValueAt(row,1).toString());
        int b = Integer.valueOf(value.toString());
        float c = a * b;
        String st_c = Float.toString(c);
        table.setValueAt(st_c, row, 2);
        return this;
    }
}
    /**
     * @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 ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(NewApplication.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(NewApplication.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(NewApplication.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(NewApplication.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 NewApplication().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JPanel pan;
    // End of variables declaration                   
}

le code pour la Jtable

Code :

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 public NewApplication() {
        initComponents();
        panel = new JPanel();
         Object[][] data = {{"3","4","6","8"},{"5","6","7","8"}};
        String [] title = {"cell0","cell1","cell2","cell3"};
        table = new JTable( data,title);
        panel.add(table);
        this.getContentPane().add(new JScrollPane(panel), BorderLayout.CENTER);
 
    }