static int countVowels ( String str , int n ) {
  if ( n == 1 ) return isVowel ( str . charAt ( n - 1 ) ) ;
  return countVowels ( str , n - 1 ) + isVowel ( str . charAt ( n - 1 ) ) ;
}

static int countVowels ( String str , int n ) { if ( n == 1 ) return isVowel ( str . charAt ( n - 1 ) ) ; return countVowels ( str , n - 1 ) + isVowel ( str . charAt ( n - 1 ) ) ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (return_statement (method_invocation name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)))))))) (return_statement (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (identifier) (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (method_invocation name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal))))))))))