Sencha GXT Release package
· This project represents a full ExtGWT release, available for download by non-maven users. Maven users should make use of the artifacts in central, or the snapshots made available by the ExtGWT team.
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 gxt-release-3.0.1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.