Java的简单GUI界面

Question

doing some self study for a simple GUI interface for Java. Tried to code a simple interface. Here is the below code:

public void MainPanel() {

    JFrame frame = new JFrame();
    frame.setTitle("Title");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JTabbedPane mpt = new JTabbedPane();

    mpt.addTab("Intro", new IntroPanel());
    mpt.addTab("Catalogue", new CataloguePanel());
    mpt.addTab("Order", new OrderPanel());
    mpt.addTab("Track", new TrackPanel());

    JPanel main = new JPanel();
    main.setBackground(Color.white);

    JLabel label1 = new JLabel("Intro");

    main.add(label1);
    frame.add(main);
    frame.add(mpt);       
    frame.pack();
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
}

The problem I am currently facing is: If I put frame.add(main) infront of frame.add(mpt) , only the tabs will appear but the the label intro. If I put frame.add(mpt) infront of frame.add(main) . Intro will appear but not the tabs.

Why is this happening? Why are they overlapping each other? I did it the same way as some tutorial but to no avail..

Answer 1

Try giving it some other layout.

eg. frame.setLayout(new FlowLayout());

Info:

According to Java Naming Conventions your method's name should be like public void mainPanel()