Cannot Clear JFrame

Question

I am writing a program where there is a JFrame with a JPanel with a login gui. After logging in successfully, a method is called that clears the JFrame. The issue I am having is that instead of clearing the JFrame, the stuff in the JPanel is still visibly there and it is just frozen.

Method that creates login gui:

public void logingui() {

    JPanel loginpanel = new JPanel(new GridBagLayout());
    GridBagConstraints c = new GridBagConstraints();
    c.fill = GridBagConstraints.HORIZONTAL;
    c.gridx = 0;
    c.gridy = 0;
    c.gridwidth = 2;
    JLabel gamename = new JLabel("InvestGame By Ama291");
    gamename.setFont(new Font("Arial", 1, 22));
    loginpanel.add(gamename, c);
    c.ipady = 20;
    c.gridx = 0;
    c.gridy = 1;
    loginpanel.add(new JPanel(), c);
    c.ipady = 10;
    c.gridwidth = 1;
    c.gridx = 0;
    c.gridy = 2;        
    loginpanel.add(new JLabel("Username: "), c);
    c.gridx = 1;
    final JTextField userfield = new JTextField(10);
    loginpanel.add(userfield, c);
    c.gridx = 0;
    c.gridy = 3;
    loginpanel.add(new JPanel(), c);
    c.gridx = 0;
    c.gridy = 4;
    loginpanel.add(new JLabel("Password: "), c);
    c.gridx = 1;
    final JPasswordField passfield = new JPasswordField(10);
    loginpanel.add(passfield, c);
    c.gridx = 0;
    c.gridy = 5;
    c.ipady = 20;
    loginpanel.add(new JPanel(), c);
    c.ipady = 10;
    c.gridx = 0;
    c.gridy = 6;
    c.gridwidth = 1;
    JButton createacc = new JButton("Create Account");
    loginpanel.add(createacc, c);
    c.gridx = 1;
    JButton login = new JButton("Log In");
    loginpanel.add(login, c);
    add(loginpanel);
}

Method to clear JFrame:

public void gamegui() {

    JPanel gamepanel = new JPanel();
    removeAll();
    invalidate();
    validate();
    repaint();
    add(gamepanel);
}

Does anyone know how I can successfully remove the JPanel from the JFrame without the buttons and stuff from the JPanel frozen inside of the window? This is the issue I'm having.

Please consider CardLayout, for this sort of a problem, as already stated. For [example](http://stackoverflow.com/a/9349137/1057230) :-) — nIcE cOw, Aug 18 '13 at 17:24
Going to use CardLayout for something else in my program, thanks for showing me how to use it. — ama291, Aug 19 '13 at 05:17

score 2 · Accepted Answer · answered Aug 18 '13 at 05:07

2

For a login it is probably better to use a popup JDialog. Then when the dialog closes you just display the panel on the frame.

The other option is to use a Card Layout. The you can swap panels as required.

answered Aug 18 '13 at 05:07

camickr

321,443
19
166
288

I'm going to try to use a JDialog, it'll make things much easier. I don't have much experience with swing and didn't even know it existed. Thanks a lot for the suggestion! – ama291 Aug 18 '13 at 05:15
Ok, so I actually fixed my problem by doing setVisible(false); before the removal of the old JPanel and the addition of the new JPanel. Then I set the visibility to true after this was done and it works fine now. However, I decided that I am going to use a JDialog because it basically will have the same function and seems easier to me. – ama291 Aug 18 '13 at 05:26

score 1 · Answer 2 · answered Jan 04 '14 at 19:13

1

When removing components from a JFrame, the component will be removed but it will visually still be there. Therefore, to hide it or refresh the JFrame, use the .setVisible(false) method.

answered Jan 04 '14 at 19:13

user3161084

11
1

Hello my friend! Yeah this is the solution I was looking for but you answered it a bit too late, I'm no longer working on this project – ama291 Jan 04 '14 at 19:15
1

Fail, didn't check the date – user3161084 Jan 04 '14 at 19:16

score 0 · Answer 3 · answered Aug 18 '13 at 13:07

0

if you ll just add

this.setLayout(your layout)

//your layout=the layout which you are using. i.e border,card etc..

between the invalidate() and validate() methods in your code in gamegui().

I hope it ll work . I havent tried but hope it ll work.

answered Aug 18 '13 at 13:07

Mukesh Kumar Singh

623
1
10
18

Cannot Clear JFrame

3 Answers3