Requirements eclipse openjdk 11 How to use choose paths crop right click : next image left click : annotate mouse wheel : change radius How to compile 1. Clone this repository to eclipse workspace 2. Create New project named "circleCrop" (or the name of the cloned directory you specified). 3. Add missing JRE libraries This SO answer might be helpful. I couldn't find a way to properly include JRE library in git. https://stackoverflow.com/questions/4242641/jre-system-library-not-found-exception-in-eclipse 3.1 Right click the project and choose properties 3.2 click "Add JARs" 3.3 choose "JRE system library" 3.4 choose path of JRE you like "Workspace default JRE" worked for me. 4. Now you can run and complile this project from "Run button" of your eclipse!