Install libskinlf-java by entering the following commands in the terminal:
sudo apt update sudo apt install libskinlf-java
Description:
Skin Look and Feel - Skinning Engine for the Swing toolkit
Skin Look And Feel allows Java developers to write skinnable application using the Swing toolkit. Skin Look And Feel is able to load themepacks (a bundle of GTK+ - The Gimp Toolkit - and KDE - The K Desktop Environment - skins) to enhance your application GUI controls such as Buttons, Checks, Radios, Scrollbars, Progress Bar, Lists, Tables, Internal Frames, Colors, Background Textures, Regular Windows. . Skin Look And Feel (aka SkinLF) also includes NativeSkin to create irregular windows.
Homepage: http://skinlf.l2fprod.com
Version: 6.7-10
Section: universe/libs