Java Swing change panel when a button is pressed from different class

Question

I am writing a program in Java with Java Swing. I have a class, which is a custom JPanel (my class extends JPanel), which is a log in page. The panel contains a button called "Enter".

When I create my main JFrame, I add the Log in Panel in it. When the button "Enter" is pressed I want to remove the Log In panel and proceed to the next panel.

So how can I make my frame understand when the button "Enter" from the Log In panel is pressed (they are in different classes), so that it proceeds to the next page?

Answer 1

To be able to switch beetween JPanels enclose them in CardLayout:

JPanel cards;
final static String BUTTONPANEL = "Card with JButtons";
final static String TEXTPANEL = "Card with JTextField";

//Where the components controlled by the CardLayout are initialized:
//Create the "cards".
JPanel card1 = new JPanel();
...
JPanel card2 = new JPanel();
...

//Create the panel that contains the "cards".
cards = new JPanel(new CardLayout());
cards.add(card1, BUTTONPANEL);
cards.add(card2, TEXTPANEL);

You should add ActonListener to the "Enter" button:

JButton enterButton = ...
enterButton.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
              CardLayout cl = (CardLayout)// your reference to the CardLayout here eg. yourJFrame.getContentPane().getLayout();
              cl.show(cards, "The name of panel to show, you gave it with the add operation on cardLayout eg. BUTTONPANEL OR TEXTPANEL");
      }

});