Enable / Disable JPanel And Its ComboBoxes

I have a class that extends JFrame, within that, i have set up JPanel where within that i have four JComboBoxes, I am to enable this JPanel and its JComboBoxes at the end of a method

The code for that method is:

private void tableNumberJComboBoxItemStateChanged() {
// load data for table
try {
// get data for table
myResultSet = myStatement.executeQuery("SELECT * FROM"
+ "restauranttables WHERE tableNumber = " + Integer.parseInt(
selectedTableNumber));
 
[Code] ....

I am not sure how to enable this JPanel? I have another Jpanel to Disable but one question at a time i suppose.