Install libosgi-core-java-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libosgi-core-java-doc
Description:
Javadoc for Java OSGi API - Core module
OSGi, for Open Services Gateway initiative framework, is a module system and service platform for the Java programming language. . This package contains Javadoc HTML documentation for libosgi-core-java.
Homepage: http://www.osgi.org/Specifications/HomePage
Version: 6.0.0-1
Section: universe/doc