syntactic sugar to add and short cut for the very useful constants

A DESCRIPTION OF THE PROBLEM :
please just add and short cut for the very usefull constant:

    /**
     * The system-dependent default name-separator character, represented as a
     * string for convenience. This string contains a single character, namely
     * {@link #separatorChar}.
     */
    public static final String separator = "" + separatorChar;
 

helper for shorter urls on mobile screens 120 chars cap. is not long for big urls:

import static java.io.File.separator;


    static final String sep = separator;




api.get(studies + sep + studyId + sep + participants + sep + participantId + sep + results).then()
api.get(studies + sep + studyId + sep + participants + sep + participantId + sep + results + sep + resultId).then()
api.get(studies + sep + studyId + sep + participants + sep + participantId + sep + results + sep + status + sep + statusId).then()

otherwise i always have to write the full name even tho even clear in this context so i build this short cut myself.

thanks