JAXB-2 Maven Plugin
· Mojo's JAXB-2 Maven plugin is used to create an object graph
from XSDs based on the JAXB 2.x implementation and to generate XSDs
from JAXB annotated Java classes.
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 jaxb-2.1.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.