JRS: Java implementation of RFC-5646 (language tag), GWT port
· JRS: GWT implementation of RFC-5646 (language tag) based on Connect2id language tag library. Java implementation of "Tags for Identifying Languages", RFC-5646. Supports normal language tags. Special private language tags beginning with "x" and grandfathered tags beginning with "i" are not supported.
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 org.jresearch.locale.languageTag.gwt-1.1.1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.