private void jComboBox1ItemStateChanged(java.awt.event.ItemEvent evt) {//GEN-FIRST:event_jComboBox1ItemStateChanged
        // TODO add your handling code here:
        jLabel2.setText(lesPiece.get(jComboBox1.getSelectedIndex()).getValeur().toString());
    }//GEN-LAST:event_jComboBox1ItemStateChanged