POM Manipulation Extension for Maven
· Manipulation Tool (available as library, extension and CLI) for Apache Maven that allows pre-processing of Maven pom.xml's.
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 pom-manipulation-parent-4.16.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.