How to Dynamically Update JTextArea Using SwingPropertyChangeSupport?

Using SwingPropertyChangeSupport to Dynamically Update JTextArea

In your code snippet, you're facing an issue where the JTextArea representing the array doesn't update after modifications are made using the input dialog. This occurs because you haven't correctly notified the SwingPropertyChangeSupport that the property has changed.

To resolve this, let's modify the ArrayForUpdating class:

<code class="java">public class ArrayForUpdating {
    // Existing code...

    public void setArrayData(int a, int memData) {
        // Existing code...

        // Fire the property change event
        setArrayyDisplayString();
        firePropertyChange(BOUND_PROPERTY, oldValue, newValue);
    }
}</code>

In the setArrayData method, after updating the array and generating the new display string, we now explicitly fire a property change event using firePropertyChange. This notifies all registered listeners that the BOUND_PROPERTY has been modified.

By updating the property in this manner, the GuiForUpdate class will be notified of the change and will update the JTextArea accordingly.

Here's the updated GuiForUpdate class:

<code class="java">public class GuiForUpdate extends JFrame implements ActionListener {

    // Existing code...

    /**
     * Adds a display area for array
     */
    public void layoutDisplay() {
        // Existing code...

        arrayForUpdate.addPropertyChangeListener(new PropertyChangeListener() {

            @Override
            public void propertyChange(PropertyChangeEvent pcEvt) {
                if (pcEvt.getPropertyName().equals(
                        ArrayForUpdating.BOUND_PROPERTY)) {
                    mList = (pcEvt.getNewValue().toString());
                    displayOutput.setText(mList);
                }
            }
        });
    }
}</code>

In the layoutDisplay method, we've updated the property change listener to update the displayOutput text area when the BOUND_PROPERTY changes.

By incorporating these changes, the JTextArea will now dynamically reflect any modifications made to the array through the input dialog.

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