How Can I Update a JLabel with Words from an ArrayList Every X Seconds in Swing?

Update JLabel Every X Seconds from ArrayList

In this article, we'll address an issue where you're facing challenges updating a JLabel dynamically in a Swing application. Specifically, you're trying to display a sequence of words, with each word appearing for a certain duration.

To solve this, we'll leverage the javax.swing.Timer class. Here's an overview of how it works:

1. Create a Timer: Define a timer that will trigger an action every X milliseconds. For example, to display words every 2 seconds, set a delay of 2000 milliseconds.

final Timer timer = new Timer(2000, null);

2. Implement ActionListener: Create an ActionListener to execute when the timer triggers an event. In this listener, you'll update the text displayed on the JLabel.

ActionListener listener = new ActionListener() {
    private Iterator<Word> it = words.iterator();

    @Override
    public void actionPerformed(ActionEvent e) {
        if (it.hasNext()) {
            JLabel.setText(it.next().getName());
        }
        else {
            timer.stop();
        }
    }
};

3. Add ActionListener to Timer: Associate the ActionListener with the timer.

timer.addActionListener(listener);

4. Start Timer: Initiate the timer to begin triggering events.

timer.start();

5. Update Text On Event: When the timer triggers an event, the ActionListener updates the JLabel's text with the next word in the list. If there are no more words, it stops the timer.

By following these steps, you can achieve the desired effect of dynamic text updates on a JLabel.

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