returns true if the string consists of only digits between 0 and 9 inclusive . concode_field_sep int _DIGIT_BEGIN concode_elem_sep int _DIGIT_END concode_elem_sep int _CHAR_LOWER_CASE_BEGIN concode_elem_sep int _CHAR_LOWER_CASE_END concode_elem_sep int _CHAR_UPPER_CASE_BEGIN concode_elem_sep int _CHAR_UPPER_CASE_END concode_field_sep boolean isNotNull concode_elem_sep boolean isNotNull concode_elem_sep boolean isChar concode_elem_sep boolean equals concode_elem_sep boolean equals concode_elem_sep boolean equals concode_elem_sep boolean equals concode_elem_sep boolean equals concode_elem_sep boolean equals concode_elem_sep boolean equals concode_elem_sep boolean equals concode_elem_sep boolean equals concode_elem_sep boolean isNull concode_elem_sep boolean isNull concode_elem_sep boolean isBlank
boolean function ( String arg0 ) { if ( isNull ( arg0 ) ) { return false ; } for ( char loc0 : arg0 . toCharArray ( ) ) { if ( ! isDigit ( loc0 ) ) { return false ; } } return true ; }