commons-file/src/main/java/jargs/gnu/CmdLineParser.java
public final Option addOption( Option opt ) {
        if ( opt.shortForm() != null )
            this.options.put("-" + opt.shortForm(), opt);
        this.options.put("--" + opt.longForm(), opt);
        return opt;
    }
public final Option addOption( Option opt ) {
        if ( opt.shortForm() != null )
            this.options.put("-" + opt.shortForm(), opt);
        this.options.put("--" + opt.longForm(), opt);
        return opt;
    }
Add the specified Option to the list of accepted options