How to implement a dropdown menu in Java?

There are several ways to implement dropdown menus in Java, two common methods are as follows:

1. The JComboBox class from the Swing library.
2. The following code uses Java’s Swing library to create a ComboBox example. It creates a JFrame window with a JComboBox that contains three items. The window is displayed with the ComboBox positioned at coordinates (50, 50) with a size of 90×20.
3. The ComboBox class from the JavaFX library:
4. This code imports necessary JavaFX libraries and creates a simple ComboBox example with three items to choose from.

Both methods can be used to create a dropdown menu and add a list of options to it.