code: private void sizeComboBoxActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_sizeComboBoxActionPerformed
          String fontSize = (String)sizeComboBox.getSelectedItem();
          if (!this.getDefaultText().equalsIgnoreCase(fontSize))
              properties.put(ScreenUtil.FONT_SIZE, fontSize);
          else
              properties.remove(ScreenUtil.FONT_SIZE);
  
          ScreenUtil.updateLookAndFeel(this, null, properties);
          this.setSampleStyle();
      }
docs: GEN-LAST:event_resetButtonActionPerformed