Changing panels when a button is clicked

Question

So here is my question:

I would like to create a new panel that asks the user to enter Bank Account Information (Account Name, and Account Number) and when the user clicks on the Login button, it changes panels to the Withdraw/Deposit Panel and also displays your Account Name at the top. I have the Withdraw/Deposit Panel all completed, but am stumped on how to create the Information Panel and to make it appear BEFORE the Withdraw/Deposit Panel, etc.

Here is my code:

public class MyFrame extends JFrame {

    private JPanel panel;
    private JLabel wordsLabel;
    private JLabel balanceLabel;
    private JLabel choiceLabel;
    private JTextField transactionAmount;
    private JRadioButton depositButton;
    private JRadioButton withdrawButton;
    private double balance;

    public MyFrame() {
        final int FIELD_WIDTH = 5;
        balance = 500;
        panel = new JPanel();
        wordsLabel = new JLabel();
        balanceLabel = new JLabel();
        choiceLabel = new JLabel();
        transactionAmount = new JTextField(FIELD_WIDTH);
        JPanel buttonPanel = new JPanel();
        ButtonGroup myGroup = new ButtonGroup();
        depositButton = new JRadioButton("Deposit");
        withdrawButton = new JRadioButton("Withdraw");
        transactionAmount.setText("0");
        wordsLabel.setText("Welcome to Wes Banco! Your current balance is: ");
        balanceLabel.setText(String.format("%10.2f", balance));
        choiceLabel.setText("How much would you like to deposit/withdraw? ");
        panel.setLayout(new GridLayout(4, 4, 5, 10));
        panel.add(wordsLabel);
        panel.add(balanceLabel);
        panel.add(choiceLabel);
        panel.add(transactionAmount);
        myGroup.add(depositButton);
        myGroup.add(withdrawButton);
        buttonPanel.add(depositButton);
        buttonPanel.add(withdrawButton);
        ButtonListener myListener = new ButtonListener();
        depositButton.addActionListener(myListener);
        withdrawButton.addActionListener(myListener);    
        panel.add(buttonPanel);
        this.add(panel);
    }

    class ButtonListener implements ActionListener {

        @Override
        public void actionPerformed(ActionEvent event) {
            double amount = Double.parseDouble(transactionAmount.getText());
            if (amount == 0) {
                JOptionPane.showMessageDialog(null, 
                       "You cannot deposit or withdraw nothing!");
                JOptionPane.showMessageDialog(null, 
                       "Please enter a valid amount.");
            } else {
                if (event.getSource() == depositButton) {
                    JOptionPane.showMessageDialog(null,
                            "You have deposited: " + amount);
                    balance += amount;
                } else if (event.getSource() == withdrawButton) {
                    if (balance < amount) {
                        JOptionPane.showMessageDialog(null,
                                "You do not have sufficient funds to complete this transaction.");
                        JOptionPane.showMessageDialog(null,
                                "Please enter a valid amount.");
                    } else {
                        JOptionPane.showMessageDialog(null,
                                "You have withdrawn: " + amount);
                        balance -= amount;
                    }
                }
                balanceLabel.setText(String.valueOf(balance));
            }
        }
    }
}

Consider using [CardLayout](http://docs.oracle.com/javase/tutorial/uiswing/layout/card.html), as shown in this [example](http://stackoverflow.com/a/9349137/1057230) — nIcE cOw, Jul 24 '13 at 08:39

score 1 · Answer 1 · answered Jul 24 '13 at 07:10

1

My advice would be: Don´t create the panel in your JFrame constructor. Make an InfoPanel class and a WithdrawPanel class. Then you can decide programatically which panel is displayed in your frame.

answered Jul 24 '13 at 07:10

Jannis Alexakis

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Wouldn't that include me having to basically redo the whole thing? – vVv Sintherius Jul 24 '13 at 07:13
I like this approach, related to __separation of concerns__ +1 for that :-) – nIcE cOw Jul 24 '13 at 08:41
@vVvSintherius It does include having to do the whole thing, but it will be much easier to read and maintain. Plus, it´s really a lot of copy/paste from the old class to the new one. – Jannis Alexakis Jul 25 '13 at 09:04
I honestly have no clue how I would go upon doing that. – vVv Sintherius Jul 25 '13 at 15:38
I can´t write it down for you, sorry. There are several ways to do it.I strongly recommend reading through the Swing section of the Oracle tutorials, it´s great help. – Jannis Alexakis Jul 26 '13 at 06:36

Changing panels when a button is clicked

1 Answers1