HarfBuzz
· HarfBuzz is a text shaping library. Using the HarfBuzz library allows programs to convert a sequence of Unicode input into properly formatted and positioned glyph output—for any writing system and language.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window harfbuzz-ndk25-shared-8.2.2-beta-1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.