GroovyMail
· GroovyMail aims to replace using JavaMail as the API to send email in Groovy by
building a domain specific language (DSL) on top of JavaMail to make
sending email simpler.
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 GroovyMail-0.1.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.