{"id":4543,"date":"2025-01-13T18:28:06","date_gmt":"2025-01-13T09:28:06","guid":{"rendered":"https:\/\/www.wsmeguro.jp\/wp\/?p=4543"},"modified":"2025-01-13T18:28:06","modified_gmt":"2025-01-13T09:28:06","slug":"dart%e3%81%ae%e5%8b%89%e5%bc%b710%e2%88%921%ef%bc%9a%e3%82%af%e3%83%a9%e3%82%b9%e3%81%ae%e5%9f%ba%e6%9c%ac","status":"publish","type":"post","link":"https:\/\/www.wsmeguro.jp\/wp\/?p=4543","title":{"rendered":"Dart\u306e\u52c9\u5f3710\u22121\uff1a\u30af\u30e9\u30b9\u306e\u57fa\u672c"},"content":{"rendered":"

\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a00\u8a9e\u3067\u3042\u308bDart\u306e\u57fa\u672c\u7684\u306a\u69cb\u6210\u8981\u7d20\u3067\u3001\u30c7\u30fc\u30bf\uff08\u30d5\u30a3\u30fc\u30eb\u30c9\uff09\u3068\u52d5\u4f5c\uff08\u30e1\u30bd\u30c3\u30c9\uff09\u3092\u307e\u3068\u3081\u305f\u3082\u306e\u3067\u3059\u3002
\nMap\u578b\u306e\u3088\u3046\u306b\u30ad\u30fc\u3068\u5024\u3092\u90fd\u5ea6\u3057\u3066\u30d0\u30b0\u3092\u4f5c\u308b\u3053\u3068\u3092\u56de\u907f\u3059\u308b\u306e\u306b\u4fbf\u5229\u3067\u3001\u3055\u3089\u306b\u51e6\u7406\u7d50\u679c\u3082\u8fd4\u3057\u3066\u304f\u308c\u308b\u512a\u308c\u3082\u306e\u3067\u3059\u3002<\/p>\n

    \n
  1. \u30af\u30e9\u30b9\u306e\u5b9a\u7fa9\n
    \n
    \r\nclass Person {\r\n  \/\/ \u30d5\u30a3\u30fc\u30eb\u30c9\uff08\u5c5e\u6027\uff09\r\n  String name;\r\n  int age;\r\n  \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\uff08\u521d\u671f\u5316\uff09\r\n  Person(this.name, this.age);\r\n  \/\/ \u30e1\u30bd\u30c3\u30c9\uff08\u52d5\u4f5c\uff09\r\n  void greet() {\r\n    print('Hello, my name is $name and I am $age years old.');\r\n  }\r\n}\r\n\r\nvoid main() {\r\n  \/\/ Person\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\r\n  var person = Person('Alice', 30);\r\n  \/\/ \u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u30a2\u30af\u30bb\u30b9\r\n  print(person.name); \/\/ Alice\r\n  \/\/ \u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\r\n  person.greet(); \/\/ Hello, my name is Alice and I am 30 years old.\r\n}\r\n<\/pre>\n<\/div>\n<\/li>\n
  2. \u7d99\u627f\n
    \n
    \r\nclass Animal {\r\n  void sleep() {\r\n    print('Sleeping...'); \/\/\u30e1\u30bd\u30c3\u30c9\u3060\u3051\u3067\u3059\u304c\u3001\u3053\u308c\u3082\u30af\u30e9\u30b9\u3067\u3059\u3002\r\n  }\r\n}\r\n\r\nclass Dog extends Animal {\r\n  void bark() {\r\n    print('Wan');\r\n  }\r\n}\r\n\r\nvoid main() {\r\n  var dog = Dog();\r\n  dog.sleep(); \/\/ Sleeping...Animal\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u3066\u3044\u308b\u305f\u3081\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\r\n  dog.bark(); \/\/ Wan\r\n}\r\n<\/pre>\n<\/div>\n<\/li>\n
  3. Getter\u3068Setter
    \n\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u53d6\u5f97\u3057\u305f\u308a\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306e\u7279\u5225\u306a\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002<\/p>\n
    \n
    \r\nclass Circle {\r\n  double _radius = 1.0; \/\/ \u975e\u516c\u958b\u3068\u306a\u3063\u3066\u3044\u308b\u30d5\u30a3\u30fc\u30eb\u30c9_radius\u306b\u521d\u671f\u5024\u3092\u8a2d\u5b9a\r\n\r\n  Circle(double radius) {\r\n    this.radius = radius; \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u3082Setter\u3092\u4f7f\u7528\r\n  }\r\n\r\n  \/\/ Getter\r\n  double get radius => _radius;\r\n\r\n  \/\/ Setter with validation\r\n  set radius(double value) {\r\n    if (value <= 0 || value > 1000000) {\r\n      throw ArgumentError('Radius must be between 0 and 1,000,000.');\r\n    }\r\n    _radius = value;\r\n  }\r\n\r\n  \/\/ Getter for length\r\n  double get length => 2 * 3.14 * _radius;\u3000\/\/radius\u304c\u6c7a\u307e\u308c\u3070\u4e00\u610f\u306b\u6c7a\u307e\u308b\u5024\u306e\u5834\u5408\u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u3057\u3066\u8a18\u61b6\u3059\u308b\u5fc5\u8981\u304c\u306a\u3044\u306e\u3067\u90fd\u5ea6\u8a08\u7b97\u3057\u3066\u5f15\u304d\u6e21\u3059\u3002\r\n}\r\n\r\nvoid main() {\r\n  try {\r\n    var circle = Circle(15); \/\/ \u6b63\u5e38\u5024\r\n    print(circle.radius); \/\/ 15\r\n    print(circle.length); \/\/ 94.2\r\n\r\n    circle.radius = -10; \/\/ \u7570\u5e38\u5024\r\n  } catch (e) {\r\n    print(e); \/\/ Radius must be between 0 and 1,000,000.\r\n  }\r\n}\r\n<\/pre>\n<\/div>\n
    \u3053\u306e\u3088\u3046\u306b\u3001Setter\u3068\u975e\u516c\u958b\u5909\u6570\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u3001\u5165\u529b\u30c1\u30a7\u30c3\u30af\u304c\u7c21\u5358\u306b\u3067\u304d\u3001\u30af\u30e9\u30b9\u306e\u5909\u6570\u306b\u7570\u5e38\u5024\u304c\u4ee3\u5165\u3055\u308c\u4e88\u671f\u3057\u306a\u3044\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u3092\u56de\u907f\u3057\u307e\u3059\u3002<\/li>\n","protected":false},"excerpt":{"rendered":"
    \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a00\u8a9e\u3067\u3042\u308bDart\u306e\u57fa\u672c\u7684\u306a\u69cb\u6210\u8981\u7d20\u3067\u3001\u30c7\u30fc\u30bf\uff08\u30d5\u30a3\u30fc\u30eb\u30c9\uff09\u3068\u52d5\u4f5c\uff08\u30e1\u30bd\u30c3\u30c9\uff09\u3092\u307e\u3068\u3081\u305f\u3082\u306e\u3067\u3059\u3002 Map\u578b\u306e\u3088\u3046\u306b\u30ad\u30fc\u3068\u5024\u3092\u90fd\u5ea6\u3057\u3066\u30d0\u30b0\u3092\u4f5c\u308b\u3053\u3068\u3092\u56de\u907f\u3059\u308b\u306e\u306b\u4fbf\u5229\u3067\u3001\u3055\u3089\u306b\u51e6\u7406\u7d50\u679c\u3082\u8fd4\u3057\u3066\u304f\u308c\u308b\u512a\u308c\u3082…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[595,505],"tags":[601,618,619],"class_list":["post-4543","post","type-post","status-publish","format-standard","hentry","category-dart2","category-programming","tag-dart","tag-dartpad"],"_links":{"self":[{"href":"https:\/\/www.wsmeguro.jp\/wp\/index.php?rest_route=\/wp\/v2\/posts\/4543","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsmeguro.jp\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsmeguro.jp\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsmeguro.jp\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsmeguro.jp\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4543"}],"version-history":[{"count":1,"href":"https:\/\/www.wsmeguro.jp\/wp\/index.php?rest_route=\/wp\/v2\/posts\/4543\/revisions"}],"predecessor-version":[{"id":4544,"href":"https:\/\/www.wsmeguro.jp\/wp\/index.php?rest_route=\/wp\/v2\/posts\/4543\/revisions\/4544"}],"wp:attachment":[{"href":"https:\/\/www.wsmeguro.jp\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4543"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsmeguro.jp\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4543"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsmeguro.jp\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4543"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}