Install libballoontip-java by entering the following commands in the terminal:
sudo apt update sudo apt install libballoontip-java
Description:
Balloon Tips for Java
Provides balloon-tips for use in Java Swing applications to be laid over any kind of swing-component such as JButton. The API is lightweight and fully customizable.
Homepage: https://balloontip.dev.java.net/
Version: 2008.11.14-0ubuntu2
Section: universe/net