Several hundred classes in the `java.desktop` module used to rely on default constructors as part of their public API. Explicit constructors were added to these classes in JDK-8250852.

As a result, a no-argument constructor, `BasicSliderUI()`, for the `BasicSliderUI` class was added in JDK 16. This missed that there already was a constructor `BasicSliderUI(JSlider b)`. Thus, there was no need for another constructor.

The `BasicSliderUI()` constructor was deprecated in JDK 23 and is removed in JDK 25.