{"author_url":"https://blog.hatena.ne.jp/andengineer/","height":"190","blog_title":"\u30a2\u30f3\u30c9\u30a8\u30f3\u30b8\u30cb\u30a2 - \u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u3053\u3068\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u304b\u3089\u3002","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftenshoku.mynavi.jp%2Fengineer%2Fguide%2Farticles%2Fjava-code%2Fcategory_frame%2F08\" title=\"\u3010Java\u30b3\u30fc\u30c9\u5165\u9580\u3011\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af_\u2467HashMap - \u30a2\u30f3\u30c9\u30a8\u30f3\u30b8\u30cb\u30a2 - \u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u3053\u3068\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u304b\u3089\u3002\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","version":"1.0","published":"2026-06-29 18:11:37","title":"\u3010Java\u30b3\u30fc\u30c9\u5165\u9580\u3011\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af_\u2467HashMap","provider_url":"https://hatena.blog","type":"rich","width":"100%","image_url":null,"description":"\u30ad\u30fc\uff0f\u5024\u306e\u30da\u30a2\u3092\u8868\u3059\u30de\u30c3\u30d7 \u2013 HashMap\u30af\u30e9\u30b9 \u30de\u30c3\u30d7\u306f\u3001\u30ea\u30b9\u30c8\u3084\u30bb\u30c3\u30c8\u3001\u30ad\u30e5\u30fc\u3068\u7570\u306a\u308a\u3001\u30ad\u30fc\u3068\u5024\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u8981\u7d20\u3092\u7ba1\u7406\u3057\u307e\u3059\u3002HashMap\u306f\u3001\u30de\u30c3\u30d7\u306e\u5b9f\u88c5\u30af\u30e9\u30b9\u306e\u4e2d\u3067\u3082\u6700\u3082\u57fa\u672c\u7684\u306a\u30af\u30e9\u30b9\u3067\u3059\u3002\u30ad\u30fc\u306f\u91cd\u8907\u3067\u304d\u305a\u3001\u307e\u305f\u9806\u756a\u3092\u6301\u3061\u307e\u305b\u3093\u3002HashMap\u30af\u30e9\u30b9\u3067\u5229\u7528\u3067\u304d\u308b\u30e1\u30bd\u30c3\u30c9\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002 HashMap\u30af\u30e9\u30b9\u306e\u4e3b\u306a\u30e1\u30bd\u30c3\u30c9 \u30e1\u30bd\u30c3\u30c9 \u6982\u8981 clear() \u3059\u3079\u3066\u306e\u8981\u7d20\u3092\u524a\u9664 containsKey(Object key) \u30ad\u30fckey\u304c\u30de\u30c3\u30d7\u306b\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3092\u5224\u5b9a containsValue(Object value) \u5024value\u304c\u30de\u30c3\u30d7\u306b\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3092\u5224\u5b9a g\u2026","blog_url":"https://tenshoku.mynavi.jp/engineer/guide/","author_name":"andengineer","url":"https://tenshoku.mynavi.jp/engineer/guide/articles/java-code/category_frame/08","categories":["\u8a00\u8a9e\u30fb\u958b\u767a","\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e","Java"]}