question: public static String arrayToCommaDelimitedString ( Object [ ] strings ) { if ( strings == null ) { return "" ; } StringBuilder builder = new StringBuilder ( ) ; for ( int i = 0 ; i < strings . length ; i ++ ) { if ( i > 0 ) { builder . append ( "," ) ; } builder . append ( String . valueOf ( strings [ i ] ) ) ; } return builder . toString ( ) ; }
target:  Turns this string array in one comma-delimited string.