question: public static int lastIndexOf ( final String value , final String needle ) { validate ( value , NULL_STRING_PREDICATE , NULL_STRING_MSG_SUPPLIER ) ; return lastIndexOf ( value , needle , value . length ( ) , true ) ; }
target:  This method returns the index within the calling String object of the last occurrence of the specified value, searching backwards from the offset. Returns -1 if the value is not found. The search starts from the end and case sensitive.