{"id":4965,"date":"2023-04-12T17:08:02","date_gmt":"2023-04-12T08:08:02","guid":{"rendered":"https:\/\/engineering.webstudio168.jp\/?p=4965"},"modified":"2023-04-13T00:23:32","modified_gmt":"2023-04-12T15:23:32","slug":"dart-introduction-tutorial","status":"publish","type":"post","link":"https:\/\/engineering.webstudio168.jp\/blog\/dart-introduction-tutorial\/","title":{"rendered":"Dart\u5165\u9580\uff1a\u57fa\u672c\u7684\u306a\u69cb\u658710\u500b\u306e\u30b5\u30f3\u30d7\u30eb\u304b\u3089\u5b66\u3076Dart\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u57fa\u790e\u3010Flutter\u3011"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 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class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/dart-introduction-tutorial\/#Dart_5%E3%81%A4%E3%81%AE%E7%89%B9%E5%BE%B4\" >Dart 5\u3064\u306e\u7279\u5fb4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/dart-introduction-tutorial\/#%E7%92%B0%E5%A2%83%E6%A7%8B%E7%AF%89%E3%81%AE%E6%96%B9%E6%B3%95%E3%80%81Dart%E3%81%AE%E5%A7%8B%E3%82%81%E6%96%B9\" >\u74b0\u5883\u69cb\u7bc9\u306e\u65b9\u6cd5\u3001Dart\u306e\u59cb\u3081\u65b9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/dart-introduction-tutorial\/#Dart%E3%81%AE%E5%9F%BA%E6%9C%AC%E7%9A%84%E3%81%AA%E6%A7%8B%E6%96%87%EF%BC%88%E3%82%B5%E3%83%B3%E3%83%97%E3%83%AB%E4%BB%98%E3%81%8D%EF%BC%89\" >Dart\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\uff08\u30b5\u30f3\u30d7\u30eb\u4ed8\u304d\uff09<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/dart-introduction-tutorial\/#%E5%A4%89%E6%95%B0%E3%81%A8%E5%9E%8B\" >\u5909\u6570\u3068\u578b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/dart-introduction-tutorial\/#%E6%9D%A1%E4%BB%B6%E5%88%86%E5%B2%90\" >\u6761\u4ef6\u5206\u5c90<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/dart-introduction-tutorial\/#%E3%83%AB%E3%83%BC%E3%83%97\" >\u30eb\u30fc\u30d7<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/dart-introduction-tutorial\/#%E9%96%A2%E6%95%B0\" >\u95a2\u6570<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/dart-introduction-tutorial\/#%E3%82%AF%E3%83%A9%E3%82%B9%E3%81%A8%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88\" >\u30af\u30e9\u30b9\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/dart-introduction-tutorial\/#%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88%E6%8C%87%E5%90%91%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0\" >\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/dart-introduction-tutorial\/#Dart%E3%81%AE%E4%BD%95%E3%81%8C%E3%81%84%E3%81%84%E3%81%AE%E3%81%8B%EF%BC%9F%E3%82%84%E4%BB%8A%E5%BE%8C%E3%81%AE%E5%B1%95%E6%9C%9B%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6\" >Dart\u306e\u4f55\u304c\u3044\u3044\u306e\u304b\uff1f\u3084\u4eca\u5f8c\u306e\u5c55\u671b\u306b\u3064\u3044\u3066<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/dart-introduction-tutorial\/#Flutter%E3%81%A7%E4%BD%9C%E3%82%89%E3%82%8C%E3%81%9F%E3%82%A2%E3%83%97%E3%83%AA%E3%82%B1%E3%83%BC%E3%82%B7%E3%83%A7%E3%83%B3\" >Flutter\u3067\u4f5c\u3089\u308c\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/dart-introduction-tutorial\/#Dart%E3%82%92%E5%AD%A6%E7%BF%92%E3%81%99%E3%82%8B%E4%B8%8A%E3%81%A7%E5%BD%B9%E7%AB%8B%E3%81%A4Web%E3%82%B5%E3%82%A4%E3%83%88\" >Dart\u3092\u5b66\u7fd2\u3059\u308b\u4e0a\u3067\u5f79\u7acb\u3064Web\u30b5\u30a4\u30c8<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">Flutter\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3059\u308b\u305f\u3081\u306b\u306fDart\u3068\u3044\u3046\u8a00\u8a9e\u3092\u7fd2\u5f97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306fFlutter\u3067\u30e2\u30d0\u30a4\u30eb\u30a2\u30d7\u30ea\u3092\u4f5c\u308a\u305f\u3044\u3001Web\u30a2\u30d7\u30ea\u3092\u4f5c\u308a\u305f\u3044\u3068\u3044\u3046\u65b9\u306b\u5411\u3051\u3066Dart\u306e\u57fa\u672c\u7684\u306a\u77e5\u8b58\u3068\u57fa\u672c\u30b9\u30ad\u30eb\u3092\u8eab\u306b\u7740\u3051\u3089\u308c\u308b\u3088\u3046\u306b\u307e\u3068\u3081\u3066\u304a\u304d\u307e\u3059\u3002\u51fa\u6765\u308b\u3060\u3051\u5206\u304b\u308a\u3084\u3059\u304f\u8aac\u660e\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<br>(\u6ce8\uff1a\u30e1\u30a4\u30f3\u30a4\u30e1\u30fc\u30b8\u306f<a href=\"https:\/\/dart.dev\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Dart\u516c\u5f0f<\/a>\u306e\u753b\u9762\u30ad\u30e3\u30d7\u30c1\u30e3\u30fc\u3067\u3059)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dart%E3%81%A8%E3%81%AF\"><\/span>Dart\u3068\u306f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dart\uff08\u30c0\u30fc\u30c8\uff09\u306f\u3001Google\u304c\u958b\u767a\u3057\u3066\u3044\u308b\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u3059\u30022011\u5e74\u306b\u6700\u521d\u306b\u767a\u8868\u3055\u308c\u3001JavaScript\u3084Java\u306a\u3069\u306e\u65e2\u5b58\u306e\u8a00\u8a9e\u306b\u5f71\u97ff\u3092\u53d7\u3051\u3066\u8a2d\u8a08\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u73fe\u5728\u3001Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u30e2\u30d0\u30a4\u30eb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306a\u3069\u3001\u3055\u307e\u3056\u307e\u306a\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3067\u5229\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001Dart\u306f\u30d5\u30eb\u30b9\u30bf\u30c3\u30af\u306e\u958b\u767a\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3042\u308bFlutter\u306e\u516c\u5f0f\u8a00\u8a9e\u3067\u3082\u3042\u308a\u3001Flutter\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u767a\u306b\u304a\u3044\u3066\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7279\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u7126\u70b9\u3092\u5f53\u3066\u3066\u304a\u308a\u3001<strong>\u9759\u7684\u578b\u4ed8\u3051<\/strong>\u3068<strong>\u52d5\u7684\u578b\u4ed8\u3051<\/strong>\u306e\u4e21\u65b9\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001Dart\u306fJavaScript\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\uff08\u30d3\u30eb\u30c9\uff09\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u306b\u3082\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"dart%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB%E3%81%AE%E6%8B%A1%E5%BC%B5%E5%AD%90\"><\/span>dart\u30d5\u30a1\u30a4\u30eb\u306e\u62e1\u5f35\u5b50<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Dart\u30d5\u30a1\u30a4\u30eb\u306e\u62e1\u5f35\u5b50\u306f <code>.dart<\/code>\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"React_Native%E3%81%A8%E3%81%AE%E9%81%95%E3%81%84\"><\/span>React Native\u3068\u306e\u9055\u3044<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Flutter\u3068React Native\u306f\u3088\u304f\u6bd4\u8f03\u3055\u308c\u3001\u3069\u3061\u3089\u304c\u512a\u308c\u3066\u3044\u308b\u304b\u3001\u3069\u3061\u3089\u306e\u65b9\u304c\u9700\u8981\u304c\u3042\u308b\u306e\u304b\u8b70\u8ad6\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002\u672c\u30b5\u30a4\u30c8\u3067\u3082\u300e<a href=\"https:\/\/engineering.webstudio168.jp\/blog\/react-native%e3%82%aa%e3%83%af%e3%82%b3%e3%83%b3%e8%ab%96%e4%ba%892022\/\">React Native\u30aa\u30ef\u30b3\u30f3\u8ad6\u4e892022<\/a>\u300f\u3068\u3044\u3046\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3067\u3059\u304cDart\u3067\u66f8\u304b\u308c\u305fFlutter\u3068\u3001JavaScript\u3067\u66f8\u304b\u308c\u305fReact Native\u306f\u3001\u30e2\u30d0\u30a4\u30eb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u767a\u306b\u304a\u3044\u3066\u3069\u3061\u3089\u3082\u975e\u5e38\u306b\u4eba\u6c17\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001Flutter\u3068React Native\u306e\u4e3b\u306a\u9055\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e<\/strong>\uff1aFlutter\u306f\u3001<strong>Dart<\/strong>\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u4e00\u65b9\u3001React Native\u306f\u3001<strong>JavaScript<\/strong>\u3068React\u3068\u3044\u3046\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30b3\u30f3\u30d1\u30a4\u30eb\u65b9\u6cd5<\/strong>\uff1aFlutter\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u30cd\u30a4\u30c6\u30a3\u30d6\u30b3\u30fc\u30c9\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u9ad8\u901f\u3067\u5fdc\u7b54\u6027\u306e\u9ad8\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002React Native\u306f\u3001JavaScript\u30b3\u30fc\u30c9\u3092\u30cd\u30a4\u30c6\u30a3\u30d6\u30b3\u30fc\u30c9\u306b\u30c8\u30e9\u30f3\u30b9\u30b3\u30f3\u30d1\u30a4\u30eb\uff08\u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb\uff09*\u3057\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002<br>*\u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb\u3068\u306f\u3042\u308b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3092\u5225\u306e\u8a00\u8a9e\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>UI\u306e\u69cb\u7bc9\u65b9\u6cd5<\/strong>\uff1aFlutter\u306f\u3001UI\u3092\u30a6\u30a3\u30b8\u30a7\u30c3\u30c8\u3068\u547c\u3070\u308c\u308b\u30d3\u30eb\u30c7\u30a3\u30f3\u30b0\u30d6\u30ed\u30c3\u30af\u304b\u3089\u69cb\u7bc9\u3057\u307e\u3059\u3002\u4e00\u65b9\u3001React Native\u306f\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3068\u547c\u3070\u308c\u308b\u30d3\u30eb\u30c7\u30a3\u30f3\u30b0\u30d6\u30ed\u30c3\u30af\u304b\u3089\u69cb\u7bc9\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30b3\u30df\u30e5\u30cb\u30c6\u30a3<\/strong>\uff1aFlutter\u306e\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u306f\u3001\u6bd4\u8f03\u7684\u65b0\u3057\u3044\u3082\u306e\u3067\u3059\u304c\u3001\u6025\u901f\u306b\u6210\u9577\u3057\u3066\u3044\u307e\u3059\u3002\u4e00\u65b9\u3001React Native\u306e\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u3082\u5927\u304d\u304f\u3001\u591a\u6570\u306e\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u30fc\u30d1\u30c3\u30b1\u30fc\u30b8\u3084\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u304c\u5229\u7528\u53ef\u80fd\u3067\u3059\u3002\u3069\u3061\u3089\u3082\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u304c\u63a2\u3057\u3084\u3059\u304f\u958b\u767a\u306b\u3082\u6709\u7528\u3067\u3059\u3002<br>\uff08Flutter Japan\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\uff1a<a href=\"https:\/\/www.flutterjp.com\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">https:\/\/www.flutterjp.com\/<\/a>\uff09<\/li>\n\n\n\n<li><strong>\u958b\u767a\u8005\u306e\u30b9\u30ad\u30eb<\/strong>\uff1aFlutter\u306fDart\u3068\u3044\u3046\u6bd4\u8f03\u7684\u65b0\u3057\u3044\u8a00\u8a9e\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u958b\u767a\u8005\u306f\u65b0\u3057\u3044\u30b9\u30ad\u30eb\u3092\u5b66\u3076\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u65b9\u3001React Native\u306fJavaScript\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u591a\u304f\u306eWeb\u958b\u767a\u8005\u306b\u3068\u3063\u3066\u3001\u3088\u308a\u89aa\u3057\u307f\u3084\u3059\u3044\u3082\u306e\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u3069\u3061\u3089\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3092\u9078\u629e\u3059\u308b\u304b\u306f\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u3084\u958b\u767a\u8005\u306e\u30b9\u30ad\u30eb\u30bb\u30c3\u30c8\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002\u305f\u3060\u3001Google Trends\u306b\u3088\u308b\u3068\u6700\u8fd1\u3067\u306fFlutter\u306e\u691c\u7d22\u9700\u8981\u304cReact Natve\u3092\u5727\u5012\u3057\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002\uff08\u53c2\u8003\uff1a<a href=\"https:\/\/trends.google.co.jp\/trends\/explore?date=today%205-y&amp;geo=JP&amp;q=flutter,React%20native&amp;hl=ja\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">https:\/\/trends.google.co.jp\/trends\/explore?date=today%205-y&amp;geo=JP&amp;q=flutter,React%20native&amp;hl=ja<\/a>\uff09<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dart_5%E3%81%A4%E3%81%AE%E7%89%B9%E5%BE%B4\"><\/span>Dart 5\u3064\u306e\u7279\u5fb4<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Google\u304c\u958b\u767a\u3057\u305f\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306eDart\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a00\u8a9e<\/strong>\uff1a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a00\u8a9e\u3067\u3001\u30af\u30e9\u30b9\u3001\u7d99\u627f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3001\u62bd\u8c61\u30af\u30e9\u30b9\u306a\u3069\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u306e\u6982\u5ff5\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>JIT\u3068AOT\u306e\u4e21\u65b9\u3092\u30b5\u30dd\u30fc\u30c8<\/strong>\uff1a<strong>JIT\uff08<span class=\"bold-red\">J<\/span>ust-<span class=\"bold-red\">I<\/span>n-<span class=\"bold-red\">T<\/span>ime\uff09<\/strong>\u30b3\u30f3\u30d1\u30a4\u30e9\u3068<strong>AOT\uff08<span class=\"bold-red\">A<\/span>head-<span class=\"bold-red\">O<\/span>f-<span class=\"bold-red\">T<\/span>ime\uff09<\/strong>\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u4e21\u65b9\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002JIT\u30b3\u30f3\u30d1\u30a4\u30e9\u306f\u3001\u5b9f\u884c\u6642\u306b\u30b3\u30fc\u30c9\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u3053\u3068\u3067\u3001\u958b\u767a\u30d7\u30ed\u30bb\u30b9\u3092\u8fc5\u901f\u5316\u3057\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306e\u30c7\u30d0\u30c3\u30b0\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002AOT\u30b3\u30f3\u30d1\u30a4\u30e9\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3059\u308b\u524d\u306b\u30b3\u30fc\u30c9\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u3053\u3068\u3067\u3001\u9ad8\u901f\u3067\u6700\u9069\u5316\u3055\u308c\u305f\u30b3\u30fc\u30c9\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30a2\u30b8\u30e3\u30a4\u30eb\u958b\u767a\u306b\u9069\u3057\u305f\u8a00\u8a9e<\/strong>\uff1a\u5b9f\u9a13\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u5bb9\u6613\u3067\u3001\u30a2\u30b8\u30e3\u30a4\u30eb\u306a\u958b\u767a\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001Dart\u306e\u6587\u6cd5\u306f\u3001Java\u3084JavaScript\u306b\u5f71\u97ff\u3092\u53d7\u3051\u3066\u3044\u308b\u305f\u3081\u3001JavaScript\u3001Java\u3001C#\u3001Swift\u306a\u3069\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u958b\u767a\u8005\u306b\u3068\u3063\u3066\u99b4\u67d3\u307f\u3084\u3059\u3044\u3082\u306e\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u975e\u540c\u671f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u30b5\u30dd\u30fc\u30c8<\/strong>\uff1a\u975e\u540c\u671f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u304a\u308a\u3001\u30a4\u30d9\u30f3\u30c8\u99c6\u52d5\u578b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u7c21\u5358\u306b\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Dart\u306e\u975e\u540c\u671f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306f\u3001<code>async\/await<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b7\u30f3\u30d7\u30eb\u3067\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>Flutter\u3068\u306e\u89aa\u548c\u6027<\/strong>\uff1aGoogle\u304c\u958b\u767a\u3057\u305fUI\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3042\u308bFlutter\u306e\u516c\u5f0f\u8a00\u8a9e\u3067\u3042\u308a\u3001Flutter\u3067\u30e2\u30d0\u30a4\u30eb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u5834\u5408\u3001Dart\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0a\u304c\u3001Dart\u306e\u4e3b\u306a\u7279\u5fb4\u3067\u3059\u3002Dart\u306f\u3001\u9ad8\u901f\u3067\u5b89\u5168\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u767a\u306b\u9069\u3057\u305f\u8a00\u8a9e\u3067\u3001\u30e2\u30d0\u30a4\u30eb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u767a\u306b\u304a\u3044\u3066\u5e83\u304f\u5229\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002Dart\u3067\u66f8\u304b\u308c\u305fFlutter\u30a2\u30d7\u30ea\u3092Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3068\u3057\u3066\u30d3\u30eb\u30c9\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%92%B0%E5%A2%83%E6%A7%8B%E7%AF%89%E3%81%AE%E6%96%B9%E6%B3%95%E3%80%81Dart%E3%81%AE%E5%A7%8B%E3%82%81%E6%96%B9\"><\/span>\u74b0\u5883\u69cb\u7bc9\u306e\u65b9\u6cd5\u3001Dart\u306e\u59cb\u3081\u65b9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Dart SDK\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/strong>\uff1a\u307e\u305a\u3001Dart SDK\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3066\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u307e\u3059\u3002Dart SDK\u306f\u3001Dart\u306e\u30b3\u30f3\u30d1\u30a4\u30e9\u3001\u30e9\u30a4\u30d6\u30e9\u30ea\u3001\u958b\u767a\u30c4\u30fc\u30eb\u306a\u3069\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<br>Windows\u306e\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u30b5\u30a4\u30c8\u304b\u3089\u30a4\u30f3\u30b9\u30c8\u30fc\u30e9\u30fc\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002 <a href=\"https:\/\/dart.dev\/get-dart\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">https:\/\/dart.dev\/get-dart<\/a><br><br>macOS\u306e\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u30bf\u30fc\u30df\u30ca\u30eb\u3067\u5b9f\u884c\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-bash\" data-file=\"install-dart-for-ios.bash\" data-lang=\"Bash\"><code>brew tap dart-lang\/dart\nbrew install dart<\/code><\/pre><\/div>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li><strong>Dart\u306e\u30a8\u30c7\u30a3\u30bf\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/strong>\uff1a\u6b21\u306b\u3001Dart\u3092\u958b\u767a\u3059\u308b\u305f\u3081\u306e\u30a8\u30c7\u30a3\u30bf\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u307e\u3059\u3002Dart\u306b\u306f\u3001<a href=\"https:\/\/azure.microsoft.com\/ja-jp\/products\/visual-studio-code\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">VS Code<\/a>\u3084<a href=\"https:\/\/developer.android.com\/studio\/install?hl=ja\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Android Studio<\/a>\u3001<a href=\"https:\/\/www.jetbrains.com\/ja-jp\/idea\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">IntelliJ IDEA<\/a>\u306a\u3069\u306eIDE*\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br>*IDE\u3068\u306f\u3001<span class=\"bold-red\">I<\/span>ntegrated <span class=\"bold-red\">D<\/span>evelopment <span class=\"bold-red\">E<\/span>nvironment\uff08\u7d71\u5408\u958b\u767a\u74b0\u5883\uff09\u306e\u7565\u79f0\u3067\u3001\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u306e\u305f\u3081\u306e\u7d71\u5408\u74b0\u5883\u3092\u63d0\u4f9b\u3059\u308b\u30c4\u30fc\u30eb\u306e\u3053\u3068\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>IDE\u306eDart\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/strong>\uff1aDart\u3092\u958b\u767a\u3059\u308b\u305f\u3081\u306b\u306f\u3001IDE\u306bDart\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002IDE\u306b\u3088\u3063\u3066\u306f\u3001Dart\u30d7\u30e9\u30b0\u30a4\u30f3\u304c\u6a19\u6e96\u3067\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u3001IDE\u306e\u30d7\u30e9\u30b0\u30a4\u30f3\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u304b\u3089Dart\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210<\/strong>\uff1a\u958b\u767a\u74b0\u5883\u304c\u6574\u3063\u305f\u3089\u3001Dart\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002IDE\u306b\u3088\u3063\u3066\u306f\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u304b\u3089\u3082\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30de\u30f3\u30c9\u3067\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-bash\" data-file=\"create-dart.bash\" data-lang=\"Bash\"><code>dart create &lt;\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u540d&gt;<\/code><\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dart%E3%81%AE%E5%9F%BA%E6%9C%AC%E7%9A%84%E3%81%AA%E6%A7%8B%E6%96%87%EF%BC%88%E3%82%B5%E3%83%B3%E3%83%97%E3%83%AB%E4%BB%98%E3%81%8D%EF%BC%89\"><\/span>Dart\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\uff08\u30b5\u30f3\u30d7\u30eb\u4ed8\u304d\uff09<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%A4%89%E6%95%B0%E3%81%A8%E5%9E%8B\"><\/span>\u5909\u6570\u3068\u578b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Dart\u3067\u306f\u3001\u5909\u6570\u306e\u578b\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001var\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u3063\u3066\u578b\u63a8\u8ad6\u3082\u884c\u3046\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-dart\" data-file=\"dart-variables.dart\" data-lang=\"Dart\"><code>\/\/ \u5909\u6570\u306e\u5ba3\u8a00\u306e\u30b5\u30f3\u30d7\u30eb\nString name = &quot;Taro&quot;;\nint age = 58;\nvar height = 162.2;<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%9D%A1%E4%BB%B6%E5%88%86%E5%B2%90\"><\/span>\u6761\u4ef6\u5206\u5c90<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Dart\u3067\u306f\u3001<code>if-else<\/code>\u6587\u3084<code>switch<\/code>\u6587\u3092\u4f7f\u3063\u3066\u6761\u4ef6\u5206\u5c90\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-dart\" data-file=\"dart-if-switch.dart\" data-lang=\"Dart\"><code>\/\/ if\u6587\u306e\u30b5\u30f3\u30d7\u30eb\nif (score &gt;= 90) {\n  print(&quot;Excellent&quot;);\n} else if (score &gt;= 60) {\n  print(&quot;Good&quot;);\n} else {\n  print(&quot;Failed&quot;);\n}\n\n\/\/ switch\u6587\u306e\u30b5\u30f3\u30d7\u30eb\nswitch (day) {\n  case &quot;Monday&quot;:\n    print(&quot;Today is Monday&quot;);\n    break;\n  case &quot;Tuesday&quot;:\n    print(&quot;Today is Tuesday&quot;);\n    break;\n  default:\n    print(&quot;Today is not Monday or Tuesday&quot;);\n}<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%83%AB%E3%83%BC%E3%83%97\"><\/span>\u30eb\u30fc\u30d7<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Dart\u3067\u306f\u3001<code>for<\/code>\u30eb\u30fc\u30d7\u3084<code>while<\/code>\u30eb\u30fc\u30d7\u3092\u4f7f\u3063\u3066\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-dart\" data-file=\"dart-for-while.dart\" data-lang=\"Dart\"><code>\/\/ for\u6587\u306e\u30b5\u30f3\u30d7\u30eb\nfor (var i = 0; i &lt; 10; i++) {\n  print(i);\n}\n\n\/\/ while\u6587\u306e\u30b5\u30f3\u30d7\u30eb\nvar i = 0;\nwhile (i &lt; 10) {\n  print(i);\n  i++;\n}<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E9%96%A2%E6%95%B0\"><\/span>\u95a2\u6570<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u95a2\u6570\u3092\u5b9a\u7fa9\u3057\u3066\u518d\u5229\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u95a2\u6570\u306f\u5f15\u6570\u3092\u53d7\u3051\u53d6\u3063\u3066\u51e6\u7406\u3092\u5b9f\u884c\u3057\u3001\u623b\u308a\u5024\u3092\u8fd4\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-dart\" data-file=\"dart-function.dart\" data-lang=\"Dart\"><code>\/\/ \u95a2\u6570\u306e\u30b5\u30f3\u30d7\u30eb\uff08\u623b\u308a\u5024\u7121\u3057\uff09\nvoid sayHello(String name) {\n  print(&quot;Hello, $name!&quot;);\n}\n\n\/\/ \u95a2\u6570\u306e\u30b5\u30f3\u30d7\u30eb\uff08\u623b\u308a\u5024ind\u578b\uff09\nint add(int x, int y) {\n  return x + y;\n}<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%82%AF%E3%83%A9%E3%82%B9%E3%81%A8%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88\"><\/span>\u30af\u30e9\u30b9\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Dart\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u306e\u8a00\u8a9e\u3067\u3042\u308a\u3001\u30af\u30e9\u30b9\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002\u30af\u30e9\u30b9\u306f\u3001\u30c7\u30fc\u30bf\u3068\u30e1\u30bd\u30c3\u30c9\u3092\u307e\u3068\u3081\u305f\u3082\u306e\u3067\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-dart\" data-file=\"dart-class-object.dart\" data-lang=\"Dart\"><code>\/\/ \u30af\u30e9\u30b9\u306e\u30b5\u30f3\u30d7\u30eb\nclass Person {\n  String name;\n  int age;\n\n  Person(this.name, this.age);\n\n  void sayHello() {\n    print(&quot;Hello, my name is $name.&quot;);\n  }\n}\n\n\/\/ \u30af\u30e9\u30b9\u3092\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u4f7f\u7528\u3059\u308b\u30b5\u30f3\u30d7\u30eb\nvar john = Person(&quot;John&quot;, 25);\njohn.sayHello();<\/code><\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%82%AA%E3%83%96%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88%E6%8C%87%E5%90%91%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0\"><\/span>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dart\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a00\u8a9e\u3067\u3042\u308a\u3001\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u304c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u8868\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30af\u30e9\u30b9\u306f<strong>\u30d5\u30a3\u30fc\u30eb\u30c9\uff08\u5909\u6570\uff09<\/strong>\u3068<strong>\u30e1\u30bd\u30c3\u30c9\uff08\u95a2\u6570\uff09<\/strong>\u3092\u6301\u3061\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u614b\u3092\u8868\u3057\u307e\u3059\u3002\u30e1\u30bd\u30c3\u30c9\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5b9f\u884c\u3067\u304d\u308b\u64cd\u4f5c\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dart\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u306f\u3001\u30af\u30e9\u30b9\u7d99\u627f\u3001\u62bd\u8c61\u30af\u30e9\u30b9\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3001\u30df\u30c3\u30af\u30b9\u30a4\u30f3\u306a\u3069\u306e\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027\u3092\u9ad8\u3081\u67d4\u8edf\u6027\u306e\u3042\u308b\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dart\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u539f\u5247\u3067\u3042\u308b\u30ab\u30d7\u30bb\u30eb\u5316\u3001\u7d99\u627f\u3001\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001null safety\uff08null\u5b89\u5168\u6027\uff09\u3092\u6301\u3063\u3066\u3044\u308b\u305f\u3081\u3001<strong>null\u5024\u304c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u3092\u9632\u6b62<\/strong>\u3057\u3001\u30b3\u30fc\u30c9\u306e\u5b89\u5168\u6027\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dart%E3%81%AE%E4%BD%95%E3%81%8C%E3%81%84%E3%81%84%E3%81%AE%E3%81%8B%EF%BC%9F%E3%82%84%E4%BB%8A%E5%BE%8C%E3%81%AE%E5%B1%95%E6%9C%9B%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6\"><\/span>Dart\u306e\u4f55\u304c\u3044\u3044\u306e\u304b\uff1f\u3084\u4eca\u5f8c\u306e\u5c55\u671b\u306b\u3064\u3044\u3066<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dart\u306e\u9b45\u529b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u6319\u3052\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a00\u8a9e\u3067\u3042\u308b\u3053\u3068<\/strong>\uff1aDart\u306f\u5b8c\u5168\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a00\u8a9e\u3067\u3042\u308a\u3001\u3059\u3079\u3066\u304c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u8868\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027\u3084\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u3001\u5927\u898f\u6a21\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u3082\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>JIT\u3068AOT\u306e\u4e21\u65b9\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u3053\u3068<\/strong>\uff1aJIT\uff08Just-In-Time\uff09\u30b3\u30f3\u30d1\u30a4\u30eb\u3068AOT\uff08Ahead-Of-Time\uff09\u30b3\u30f3\u30d1\u30a4\u30eb\u306e\u4e21\u65b9\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u9ad8\u901f\u306a\u958b\u767a\u3084\u30c7\u30d0\u30c3\u30b0\u304c\u53ef\u80fd\u3067\u3042\u308a\u3001\u540c\u6642\u306b\u3001\u9ad8\u901f\u3067\u52b9\u7387\u7684\u306a\u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u3092\u751f\u6210\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>Flutter\u3068\u306e\u76f8\u6027\u306e\u826f\u3055<\/strong>\uff1aGoogle\u304c\u958b\u767a\u3057\u305f\u30e2\u30d0\u30a4\u30eb\u30a2\u30d7\u30ea\u958b\u767a\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3042\u308bFlutter\u306e\u516c\u5f0f\u8a00\u8a9e\u3067\u3059\u3002Flutter\u306f\u3001Dart\u3092\u4f7f\u7528\u3057\u3066\u30a2\u30d7\u30ea\u3092\u958b\u767a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u30a2\u30d7\u30ea\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3084\u30d3\u30b8\u30e5\u30a2\u30eb\u30c7\u30b6\u30a4\u30f3\u306b\u512a\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>null safety\u306e\u5c0e\u5165<\/strong>\uff1aDart 2.12\u304b\u3089\u306f\u3001null safety\u304c\u5c0e\u5165\u3055\u308c\u3001null\u5024\u304c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u3092\u9632\u6b62\u3057\u3001\u3088\u308a\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4eca\u5f8c\u306e\u5c55\u671b\u3068\u3057\u3066\u306f\u3001Dart\u306fFlutter\u306e\u767a\u5c55\u3068\u3068\u3082\u306b\u6210\u9577\u3057\u3066\u3044\u307e\u3059\u3002Google\u306f\u3001Flutter\u3092Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u3082\u62e1\u5f35\u3059\u308b\u8a08\u753b\u3092\u9032\u3081\u3066\u304a\u308a\u3001\u3053\u308c\u306b\u3088\u308a\u3001Dart\u306e\u9700\u8981\u306f\u4eca\u5f8c\u307e\u3059\u307e\u3059\u9ad8\u307e\u308b\u3053\u3068\u304c\u4e88\u60f3\u3055\u308c\u307e\u3059\u3002\u307e\u305f\u3001Dart\u306f\u30d5\u30eb\u30b9\u30bf\u30c3\u30af\u306eWeb\u958b\u767a\u306b\u3082\u4f7f\u7528\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u304a\u308a\u3001\u4eca\u5f8c\u307e\u3059\u307e\u3059\u305d\u306e\u7bc4\u56f2\u304c\u5e83\u304c\u308b\u3053\u3068\u304c\u671f\u5f85\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Flutter%E3%81%A7%E4%BD%9C%E3%82%89%E3%82%8C%E3%81%9F%E3%82%A2%E3%83%97%E3%83%AA%E3%82%B1%E3%83%BC%E3%82%B7%E3%83%A7%E3%83%B3\"><\/span>Flutter\u3067\u4f5c\u3089\u308c\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Flutter\u3067\u4f5c\u6210\u3055\u308c\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306fFlutter\u516c\u5f0f\u306e<a href=\"https:\/\/flutter.dev\/showcase\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Showcase\u30da\u30fc\u30b8<\/a>\u3067\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002BMW\u306e\u30a2\u30d7\u30ea\u3001Google Pay\u3001Nubank\u304c\u76ee\u7389\u4f5c\u54c1\u306e\u3088\u3046\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8ffd\u52a0\u3067Google I\/O 2022\u3067\u516c\u958b\u3055\u308c\u305f\u30d4\u30f3\u30dc\u30fc\u30eb\u30b2\u30fc\u30e0\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002Flutter\u3068Firebase\u3067\u69cb\u7bc9\u3055\u308c\u3066\u3044\u308b\u3068\u306e\u3053\u3068\u3067\u3059\u3002\uff08\u53c2\u8003\uff1a<a href=\"https:\/\/io.google\/2022\/products\/flutter\/intl\/ja\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">https:\/\/io.google\/2022\/products\/flutter\/intl\/ja\/<\/a>\uff09<br><a href=\"https:\/\/pinball.flutter.dev\/#\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">https:\/\/pinball.flutter.dev\/#\/<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dart%E3%82%92%E5%AD%A6%E7%BF%92%E3%81%99%E3%82%8B%E4%B8%8A%E3%81%A7%E5%BD%B9%E7%AB%8B%E3%81%A4Web%E3%82%B5%E3%82%A4%E3%83%88\"><\/span>Dart\u3092\u5b66\u7fd2\u3059\u308b\u4e0a\u3067\u5f79\u7acb\u3064Web\u30b5\u30a4\u30c8<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u306f\u3001Dart\u3092\u5b66\u3076\u305f\u3081\u306b\u5f79\u7acb\u3064Web\u30b5\u30a4\u30c8\u3067\u3059\u3002\u958b\u767a\u3084\u52c9\u5f37\u306e\u969b\u306b\u4fbf\u5229\u3067\u3059\u306e\u3067\u662f\u975e\u5229\u7528\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Dart.dev<\/strong>: Dart\u306e\u516c\u5f0f\u30b5\u30a4\u30c8\u3002Dart\u306e\u57fa\u790e\u304b\u3089\u4e0a\u7d1a\u8005\u5411\u3051\u306e\u30c8\u30d4\u30c3\u30af\u307e\u3067\u5e45\u5e83\u3044\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<br><a href=\"https:\/\/dart.dev\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">https:\/\/dart.dev\/<\/a><\/li>\n\n\n\n<li><strong>DartPad<\/strong>: Dart\u306e\u30b3\u30fc\u30c9\u3092\u7c21\u5358\u306b\u8a66\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u30aa\u30f3\u30e9\u30a4\u30f3\u30a8\u30c7\u30a3\u30bf\u30fc\u3002Dart\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u3084\u30b3\u30fc\u30c9\u306e\u52d5\u4f5c\u78ba\u8a8d\u306a\u3069\u306b\u4fbf\u5229\u3067\u3059\u3002<br><a href=\"https:\/\/dartpad.dev\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">https:\/\/dartpad.dev\/<\/a><\/li>\n\n\n\n<li><strong>Flutter.dev<\/strong>: Google\u304c\u958b\u767a\u3057\u305fFlutter\u306e\u516c\u5f0f\u30b5\u30a4\u30c8\u3067\u3042\u308a\u3001Dart\u8a00\u8a9e\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3082\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002Flutter\u3092\u4f7f\u7528\u3057\u305f\u30a2\u30d7\u30ea\u958b\u767a\u306b\u8208\u5473\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u3053\u3061\u3089\u306e\u30b5\u30a4\u30c8\u3082\u30c1\u30a7\u30c3\u30af\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<br><a href=\"https:\/\/flutter.dev\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">https:\/\/flutter.dev\/<\/a><\/li>\n\n\n\n<li><strong>Dart Academy<\/strong>: Dart\u306e\u5165\u9580\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3084\u3001\u30d5\u30eb\u30b9\u30bf\u30c3\u30afWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u767a\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306e\u8a18\u4e8b\u306a\u3069\u3001Dart\u306b\u95a2\u3059\u308b\u5e45\u5e83\u3044\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<br><a href=\"https:\/\/dart.academy\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">https:\/\/dart.academy\/<\/a><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u30b5\u30a4\u30c8\u3067\u3082\u5f79\u7acb\u3061\u305d\u3046\u306a\u30c8\u30d4\u30c3\u30af\u3092\u63b2\u8f09\u3057\u3066\u3044\u308b\u306e\u3067\u3088\u304b\u3063\u305f\u3089\u898b\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u306d\uff01<br><a href=\"https:\/\/engineering.webstudio168.jp\/category\/flutter\/\">https:\/\/engineering.webstudio168.jp\/category\/flutter\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Flutter\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3059\u308b\u305f\u3081\u306b\u306fDart\u3068\u3044\u3046\u8a00\u8a9e\u3092\u7fd2\u5f97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306fFlutter\u3067\u30e2\u30d0\u30a4\u30eb\u30a2\u30d7\u30ea\u3092\u4f5c\u308a\u305f\u3044\u3001Web\u30a2\u30d7\u30ea\u3092\u4f5c\u308a\u305f\u3044\u3068\u3044\u3046\u65b9\u306b\u5411\u3051\u3066Dart\u306e\u57fa\u672c\u7684\u306a\u77e5\u8b58\u3068\u57fa\u672c\u30b9\u30ad\u30eb\u3092\u8eab\u306b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4984,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":[],"rop_publish_now_history":[],"rop_publish_now_status":"pending","_themeisle_gutenberg_block_has_review":false,"sitemap_hide":"","_veu_custom_css":"","veu_display_promotion_alert":"","vkexunit_cta_each_option":"","footnotes":""},"categories":[45],"tags":[47,36,83,48,16],"class_list":["post-4965","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-flutter","tag-dart","tag-flutter","tag-83","tag-48","tag-16"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ 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