{"provider_url":"https://hatena.blog","description":"\u2705 \u30a2\u30c3\u30d7\u30ad\u30e3\u30b9\u30c8\u3068\u30c0\u30a6\u30f3\u30ad\u30e3\u30b9\u30c8 \u524d\u56de\u306finstanceof\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002 \u524d\u56de\u306e\u8a18\u4e8b\ud83d\udc47 blog.kenichikamoi.com \u4eca\u56de\u306f\u305d\u306e\u524d\u63d0\u3068\u306a\u308b\u300c\u30a2\u30c3\u30d7\u30ad\u30e3\u30b9\u30c8\u3068\u30c0\u30a6\u30f3\u30ad\u30e3\u30b9\u30c8\u300d\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002 \ud83e\udd14 \u30a2\u30c3\u30d7\u30ad\u30e3\u30b9\u30c8\u3068\u306f \ud83d\udc49 \u5b50\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u3001\u89aa\u30af\u30e9\u30b9\u578b\u3068\u3057\u3066\u6271\u3046\u3053\u3068 \u305f\u3068\u3048\u3070 Animal a = new Dog(); \u5b9f\u4f53\u306fdog\u3067\u3059\u304c\u3001\u5909\u6570\u306e\u578b\u306fAnimal\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002 \ud83d\udcbb \u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\uff08\u30a2\u30c3\u30d7\u30ad\u30e3\u30b9\u30c8\uff09 \u4eca\u56de\u3082\u72ac\u306e\u30af\u30e9\u30b9\u69cb\u9020\u3092\u4f7f\u3063\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002 class Animal {} class Dog extends Animal {} interface\u2026","published":"2026-03-28 18:18:55","height":"190","title":"\u3010Java Silver\u5bfe\u7b56\u3011\u30a2\u30c3\u30d7\u30ad\u30e3\u30b9\u30c8\u3068\u30c0\u30a6\u30f3\u30ad\u30e3\u30b9\u30c8\u306e\u9055\u3044","author_name":"kamoi-kenichi","url":"https://blog.kenichikamoi.com/entry/2026/03/28/181855","blog_url":"https://blog.kenichikamoi.com/","categories":["\u3010Java Silver\u5bfe\u7b56\u3011"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.kenichikamoi.com%2Fentry%2F2026%2F03%2F28%2F181855\" title=\"\u3010Java Silver\u5bfe\u7b56\u3011\u30a2\u30c3\u30d7\u30ad\u30e3\u30b9\u30c8\u3068\u30c0\u30a6\u30f3\u30ad\u30e3\u30b9\u30c8\u306e\u9055\u3044 - System.out.println(&quot;Java\u5b66\u7fd2\u4e2d&quot;);\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%","blog_title":"System.out.println(\"Java\u5b66\u7fd2\u4e2d\");","version":"1.0","provider_name":"Hatena Blog","type":"rich","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/k/kamoi-kenichi/20260426/20260426184154.jpg","author_url":"https://blog.hatena.ne.jp/kamoi-kenichi/"}