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Thread: CardLayout show a specific card with button click

  1. #1
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    Default CardLayout show a specific card with button click

    I'm having trouble with the CardLayout to have a particular card to be displayed when a button is clicked.

    My code is posted below and I am sure that the issue is with the ".show" part but I am not sure what is exactly wrong with it as I am a complete novice with Java and Java Swing so I am pretty much learning as I go!

    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
     
    public class CardLayoutTest {
     
        public static void main(String[] args) {
     
            final String card1Text = "Card 1";
            final String card2Text = "Card 2";
            final String card3Text = "Card 3";
            final JPanel cards; //a panel that uses CardLayout
            // button commands
            final String ONE = "ONE";
            final String TWO = "TWO";
            final String THREE = "THREE";
     
     
            JFrame frame = new JFrame("CardLayout Test");
     
     
            //Create the "cards".
            JPanel card1 = new JPanel();
            card1.setBackground(Color.RED);
     
            JPanel card2 = new JPanel();
            card2.setBackground(Color.GREEN);
     
            JPanel card3 = new JPanel();
            card3.setBackground(Color.BLUE);
     
            //Create the panel that contains the "cards".
            cards = new JPanel(new CardLayout());
            cards.add(card1, card1Text);
            cards.add(card2, card2Text);
            cards.add(card3, card3Text);
     
     
            class ControlActionListenter implements ActionListener {
                public void actionPerformed(ActionEvent e) {
                    CardLayout cl = (CardLayout) (cards.getLayout());
                    String cmd = e.getActionCommand();
                    if (cmd.equals(ONE)) {
                        cl.show(cards, ONE);
                    } else if (cmd.equals(TWO)) {
                        cl.show(cards, TWO);
                    } else if (cmd.equals(THREE)) {
                        cl.show(cards, THREE);
                    }
                }
            }
            ControlActionListenter cal = new ControlActionListenter();
     
            JButton btn1 = new JButton("ONE");
            btn1.setActionCommand(ONE);
            btn1.addActionListener(cal);
     
            JButton btn2 = new JButton("TWO");
            btn2.setActionCommand(TWO);
            btn2.addActionListener(cal);
     
            JButton btn3 = new JButton("THREE");
            btn3.setActionCommand(THREE);
            btn3.addActionListener(cal);
     
            JPanel controlButtons = new JPanel();
            controlButtons.add(btn1);
            controlButtons.add(btn2);
            controlButtons.add(btn3);
     
     
            Container pane = frame.getContentPane();
            pane.add(cards, BorderLayout.CENTER);
            pane.add(controlButtons, BorderLayout.PAGE_END);
     
     
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setSize(300, 200);
            frame.setVisible(true);
        }
    }


  2. #2
    Administrator copeg's Avatar
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    Default Re: CardLayout show a specific card with button click

    Pass the same argument name to the show method as you did to the add method.

  3. The Following User Says Thank You to copeg For This Useful Post:

    IanSawyer (April 13th, 2012)

  4. #3
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    Default Re: CardLayout show a specific card with button click

    Thanks for your help!

    It works as intended now!

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