unicode-match-property-value-ecmascript
· Match a Unicode property or property alias to its canonical property name per the algorithm used for RegExp Unicode property escapes in ECMAScript.
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 unicode-match-property-value-ecmascript-2.1.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.