Swing: Placing group of components in a frame - swing

Question

To be accurate and brief:
Is it possible to Layout a frame container with group of components(like check boxes, radio buttons, etc...) instead of adding them one by one to a frame? So, positioning them in a frame would be a lot more easier.
private void initializaUI(){
setSize(700, 600);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Panel container to wrap checkboxes and radio buttons
JPanel panel = new JPanel(null);
JPanel checkBoxPanel = new JPanel(new BoxLayout(panel, defaultCloseOperation, null));
JPanel radioPanel_1 = new JPanel(new GridLayout());
JPanel radioPanel_2 = new JPanel(new GridLayout());
//Text field to display order
JTextField orderField = new JTextField(20);
orderField.setBounds(100, 100, 100, 20);
//Button to process place the order
JButton button = new JButton("Process Selection");
button.setBounds(300, 100, 100, 40);
//toppings check boxes
checkBoxPanel.setVisible(true);
checkBoxPanel.setBounds(100, 200, 100, 50);
String Topping[] = {"Tomato", "Green Pepper", "Black Olives", "Mushrooms", "Extra Cheese", "Pepperoni", "Sausage"};
checkBoxPanel.add(new JCheckBox("Tomato"));
checkBoxPanel.add(new JCheckBox(Topping[1]));
checkBoxPanel.add(new JCheckBox(Topping[2]));
checkBoxPanel.add(new JCheckBox(Topping[3]));
checkBoxPanel.add(new JCheckBox(Topping[4]));
checkBoxPanel.add(new JCheckBox(Topping[5]));
checkBoxPanel.add(new JCheckBox(Topping[6]));
//sizes radio buttons
String size[] = {"Small:$6.50", "Medium:$8.50", "Large:$10.00"};
JRadioButton radio = new JRadioButton(size[0]);
radio.setBounds(100, 50, 100, 20);
//
panel.add(checkBoxPanel);
//
setContentPane(panel);
This is the code which supposed to perform some actions based on user entry. please help me make it clear and readable.
This is the error: "The field Component.x is not visible"

Answer 1

Yes, that's what a JPanel is for. It's an empty container that has its inner layout manager and that can be placed wherever you want inside a JFrame (or inside another JPanel). So, just to give you an example you can have:
JPanel checkBoxPanel = new JPanel(new GridLayout(..));
JPanel fieldsPanel = new JPanel(new BoxLayout(..));
checkBoxPanel.add(new JCheckBox(..));
fieldsPanel.add(new JTextField(..));
frame.setLayout(new BorderLayout());
frame.add(checkBoxPanel, BorderLayout.NORTH);
frame.add(..)