How to Create a Modal Window in Swing Using JDialog?

How to Make a JFrame Modal in Swing

When creating a GUI using Swing, you may encounter the need to restrict user interaction with the main frame until a specific component or window is closed. This can be achieved by making the frame modal. However, if you created your GUI using a JFrame, you cannot directly set its modality.

Solution:

To make a JFrame modal, you should utilize a JDialog instead. JDialog provides a comprehensive Modality API that allows you to define modal relationships between windows.

Sample Code:

Here's an example of how to display a modal JDialog containing a JPanel:

<code class="java">import javax.swing.*;

public class Main {

    public static void main(String[] args) {
        JFrame parentFrame = new JFrame();

        JDialog frame = new JDialog(parentFrame, "Modal Dialog", true);
        frame.getContentPane().add(new JPanel());
        frame.pack();
        frame.setVisible(true);
    }
}</code>

In this example, the JDialog named "frame" will be displayed modally over the "parentFrame" JFrame.

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