BasicLabelUI [1] and MetalLabelUI [2] specification states, “A Windows L&F implementation of LabelUI.”

This is wrong. BasicLabelUI is the base for specific LabelUI implementations for L&Fs; MetalLabelUI is the specific implementation for Metal L&F.

The specification for BasicLabelUI and MetalLabelUI has to be amended.

[1] https://docs.oracle.com/en/java/javase/24/docs/api/java.desktop/javax/swing/plaf/basic/BasicLabelUI.html
[2] https://docs.oracle.com/en/java/javase/24/docs/api/java.desktop/javax/swing/plaf/metal/MetalLabelUI.html