question: checks the length of a code and if a code consists of numbers only . concode_field_sep PlaceHolder placeHolder concode_field_sep boolean isLowercase concode_elem_sep boolean isValid concode_elem_sep boolean isUppercase concode_elem_sep String check
target: boolean function ( String arg0 , int arg1 ) { if ( arg0 . length ( ) != arg1 ) return false ; for ( char loc0 : arg0 . toCharArray ( ) ) if ( loc0 < 48 || loc0 > 57 ) return false ; return true ; }