When instantiating a new JDialog, they can be a hassle if the parent container is a JApplet since the JDialog class only takes an AWT container class as its parent. While you can just null, there may be instances where you need to supply a value and with that, you will have to convert the JApplet into a Frame.

The way to convert a JApplet to a Frame is by using the getAncestorOfClass() method of the SwingUtilities class. Check the code:

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