how do I move around java gui elements?

    Panel controlPanel = new Panel ();
    JPanel chatPanel = new JPanel();
    JPanel buttomsPanel = new JPanel();

    controlPanel = new Panel();
    controlPanel.setLayout(new FlowLayout(10));



    Panel panel = new Panel();

    panel.setBackground(Color.DARK_GRAY);
    panel.setSize(700,700);
    GridLayout layout = new GridLayout(6,6, 10, 10);

    panel.setLayout(layout);


    for (int i= 0; i < 36; i++){
         panel.add(new Button(""));
    }
    controlPanel.add(panel);


    buttomsPanel.add(new Button(""));
    frame.add(buttomsPanel);


    frame.add(controlPanel);
    frame.setSize(900, 700);

Basically the second button that I add to the gui won't be displayed. Also, I want to put another two fields and I do not know how to move them either, or wether they should go into a panel first and then be moved. Thanks!