static boolean divisibleBy3 ( String number ) {
  int sumOfDigit = 0 ;
  for ( int i = 0 ;
  i < number . length ( ) ;
  i ++ ) sumOfDigit += number . charAt ( i ) - '0' ;
  if ( sumOfDigit % 3 == 0 ) return true ;
  return false ;
}

static boolean divisibleBy3 ( String number ) { int sumOfDigit = 0 ; for ( int i = 0 ; i < number . length ( ) ; i ++ ) sumOfDigit += number . charAt ( i ) - '0' ; if ( sumOfDigit % 3 == 0 ) return true ; return false ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (return_statement (true))) (return_statement (false))))