question: public static String truncate ( final String value , final int length , final String filler ) { validate ( value , NULL_STRING_PREDICATE , NULL_STRING_MSG_SUPPLIER ) ; if ( length == 0 ) { return "" ; } if ( length >= value . length ( ) ) { return value ; } return append ( value . substring ( 0 , length - filler . length ( ) ) , filler ) ; }
target:  Truncate the unsecured form string, cutting the independent string of required position.