submerge-root
· Submerge is a tool that aims to merge two subtitles into one ASS displaying both: one at the top of the screen, the other at the bottom. It can also be used to convert SRT to ASS or ASS to SRT, or to change the encoding of a file.
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 submerge-root-1.9.2.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.
