Development Tools
· These are some simple tools aimed as aiding developers with tasks such as extracting information from
Javadoc and performing server log analysis.
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 devtools-1.2.2.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.