在JFrame中调整JPanel的大小

Question

I am having problem in making my Java Application to resize itself when the screen size changes.

My ui is as follows :

I have a JPanel which consist of a few images and buttons.

I have a GridLyout which i add 9 JPanel mentioned above into the GridLayout.

The problem is the JPanel object seem too big to fit into the layout. I have read that using a layout manager will resolve the problem however it didnt work in my case.

I have designed the ui using netbean GUI builder and had not make any changes to the properties. I

Any suggestion ? Thank you so much.

Windowed View

Full Screen View

I would like to achieve all 9 JPanel to show irregardless of window size. I have tried using layout recommended in some post.

Adding Jpanel

for (int x = 0; x < 9; x++) {
    UserUI tmp = new User_UI("User is " + x);
    mainPanel.add(tmp);
    validate();
}

Answer 1

You may want to try this:

If you're adding the panel to the JFrame, it may not size correctly, try setting the panel as the JFrames content pane. Instead of:

frame.add(mainPanel)

Do:

frame.setContentPane((JComponent)mainPanel);

I hope this helps :)

ALSO Did you add the layout manager to the JPanel or to the JFrame? if you set it on the JFrame, just add a layout manager to your JPanel instead!