CODEWITHSUNDEEP
javaswingjframejpanel
Mallander
Mallander

Reputation: 336

Java - Add/Remove JPanel classes

I'm trying to make the JPanels swap from one to another. Sounds simple, but I'm struggling due to having my panels all in different classes.

I have 4 classes: - GUI (Main class) - BankingAppMainFrame (JFrame class) - BankingAppStartPanel (JPanel class) <- I want to remove this JPanel - BankingAppLoginPanel (JPanel class) <- I want to add this JPanel

Here is my relevant JFrame code:

//This is the only way i didn't get errors xD
public void panelSwap(JFrame z, JPanel x, JPanel y) {
    z.remove(x);
    z.add(y);
}

Here is my relevant BankingAppStartPanel code:

LoginButton.addActionListener(new ActionListener() {

    @Override
    public void actionPerformed(ActionEvent event) {

        //I thought I'd need to instance all my classes

        BankingAppMainFrame mainFrame = new BankingAppMainFrame();
        BankingAppStartPanel startPanel = new BankingAppStartPanel();
        BankingAppLoginPanel loginPanel = new BankingAppLoginPanel();

        //This is calling the panelSwap method from the main Class

        mainFrame.panelSwap(mainFrame, startPanel, loginPanel);
    }
});

The BankingAppLoginPanel is just a blank panel at the moment until I can get this to work.

What I'm trying to do is remove the current Panel (In this case "BankingAppStartPanel" and replace it with the "BankingAppLoginPanel".

Upvotes: 1

Views: 296

Answers (2)

mKorbel
mKorbel

Reputation: 109823

//This is the only way i didn't get errors xD
public void panelSwap(JFrame z, JPanel x, JPanel y) {
    z.remove(x);
    z.add(y);
}

  • LayoutManager hasn't any notifier implemented in API(s) that notify about changes in visible Swing GUI, you have to notify programatically by calling z.revalidate() and z.repaint()

  • there is shortcuts by calling JFrame.pack() in the cases when you need to change JFrames bounds too

  • use CardLayout, with JFrame.pack() in the cases when you need to change JFrames bounds

Upvotes: 3

bhargavg
bhargavg

Reputation: 1379

If you planning to go ahead with this "swapping" panels approach, you better try using Card Layout

Upvotes: 3

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