GridLayout not displaying JButtons

Question

I currently have GridLayout(3,0) and I want to add some buttons. However, nothing shows up when I run my program.

Here is the code (the class extends JFrame):

public void initializeGraphics() {
    setLayout(new BorderLayout());
    setMinimumSize(new Dimension(1900, 1000));
    getContentPane().setLayout(null);

    setVisible(true);

    createMenu();

    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

public void createMenu() {
    JPanel menuArea = new JPanel();
    menuArea.setLayout(new GridLayout(3,0));

    menuArea.setBounds(40,40,740,870);

    JButton button1 = new JButton("test1");
    JButton button2 = new JButton("test2");
    JButton button3 = new JButton("test3");
    menuArea.add(button1);
    menuArea.add(button2);
    menuArea.add(button3);

    add(menuArea);
}

Answer 1

You need to create your UI component before setting visible attributes.

edit your code as:

createMenu();
setVisible(true);