{"id":28506,"date":"2024-03-18T18:00:12","date_gmt":"2024-03-18T09:00:12","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%aecalendar%e3%82%af%e3%83%a9%e3%82%b9%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e3%81%a9%e3%81%86%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2024-03-22T18:45:31","modified_gmt":"2024-03-22T09:45:31","slug":"java%e3%81%aecalendar%e3%82%af%e3%83%a9%e3%82%b9%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e3%81%a9%e3%81%86%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%aecalendar%e3%82%af%e3%83%a9%e3%82%b9%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e3%81%a9%e3%81%86%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"Java\u306eCalendar\u30af\u30e9\u30b9\u306e\u4f7f\u3044\u65b9\u306f\u3069\u3046\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<p>Calendar\u30af\u30e9\u30b9\u306fJava\u306b\u304a\u3044\u3066\u3001\u65e5\u4ed8\u3084\u6642\u9593\u306e\u64cd\u4f5c\u3092\u6271\u3046\u305f\u3081\u306e\u62bd\u8c61\u30af\u30e9\u30b9\u3067\u3059\u3002\u65e5\u4ed8\u3084\u6642\u9593\u306e\u8a08\u7b97\u3001\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3001\u89e3\u6790\u3092\u884c\u3046\u305f\u3081\u306e\u4e00\u9023\u306e\u9759\u7684\u30e1\u30bd\u30c3\u30c9\u3084\u5b9a\u6570\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306fCalendar\u30af\u30e9\u30b9\u306e\u4e00\u822c\u7684\u306a\u30e1\u30bd\u30c3\u30c9\u3067\u3059\uff1a<\/p>\n<ol>\n<li>\u73fe\u5728\u306e\u65e5\u4ed8\u3068\u6642\u523b\u3092\u53d6\u5f97\u3059\u308b:<\/li>\n<li>Calendar.getInstance()\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u73fe\u5728\u306e\u65e5\u6642\u3092\u6301\u3064Calendar\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3057\u307e\u3059\u3002<\/li>\n<li>\u65e5\u4ed8\u3068\u6642\u523b\u306e\u5404\u90e8\u5206\u3092\u53d6\u5f97\u3059\u308b\u3002<\/li>\n<li>get(int field)\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6307\u5b9a\u3055\u308c\u305f\u30d5\u30a3\u30fc\u30eb\u30c9\uff08\u4f8b\uff1aYEAR\u3001MONTH\u3001DAY_OF_MONTH\uff09\u306b\u5bfe\u5fdc\u3059\u308b\u5024\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/li>\n<li>\u65e5\u4ed8\u3068\u6642\u9593\u306e\u5404\u90e8\u5206\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/li>\n<li>set(int field, int value)\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u7279\u5b9a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u5024\u306b\u57fa\u3065\u3044\u3066\u65e5\u4ed8\u3068\u6642\u9593\u306e\u5bfe\u5fdc\u3059\u308b\u90e8\u5206\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/li>\n<li>\u65e5\u4ed8\u3068\u6642\u9593\u3092\u8a08\u7b97\u3059\u308b\uff1a<\/li>\n<li>add\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6307\u5b9a\u3055\u308c\u305f\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u5024\u306b\u57fa\u3065\u3044\u3066\u65e5\u4ed8\u3068\u6642\u9593\u3092\u5897\u6e1b\u3057\u307e\u3059\u3002<\/li>\n<li>\u65e5\u4ed8\u3068\u6642\u9593\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u8a2d\u5b9a:<\/li>\n<li>SimpleDateFormat\u30af\u30e9\u30b9\uff1a\u3053\u306e\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u65e5\u4ed8\u3068\u6642\u523b\u3092\u6307\u5b9a\u3055\u308c\u305f\u6587\u5b57\u5217\u5f62\u5f0f\u306b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<li>\u65e5\u4ed8\u3068\u6642\u9593\u3092\u5206\u6790\u3059\u308b\uff1a<\/li>\n<li>SimpleDateFormat\u30af\u30e9\u30b9\uff1a\u3053\u306e\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u3001\u6587\u5b57\u5217\u3092\u5bfe\u5fdc\u3059\u308b\u65e5\u4ed8\u3068\u6642\u9593\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u89e3\u6790\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u4e0a\u8a18\u306e\u65b9\u6cd5\u4ee5\u5916\u306b\u3082\u3001Calendar\u30af\u30e9\u30b9\u306b\u306f\u65e5\u4ed8\u3068\u6642\u9593\u306e\u5909\u63db\u3001\u6bd4\u8f03\u3001\u8abf\u6574\u306a\u3069\u306e\u69d8\u3005\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306f\u3001Calendar\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u73fe\u5728\u306e\u65e5\u4ed8\u3068\u6642\u9593\u3092\u53d6\u5f97\u3057\u3001\u6307\u5b9a\u3055\u308c\u305f\u6587\u5b57\u5217\u5f62\u5f0f\u306b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3059\u7c21\u5358\u306a\u4f8b\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.util.Calendar;\r\n<span class=\"hljs-keyword\">import<\/span> java.text.SimpleDateFormat;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">CalendarExample<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> {\r\n        <span class=\"hljs-type\">Calendar<\/span> <span class=\"hljs-variable\">calendar<\/span> <span class=\"hljs-operator\">=<\/span> Calendar.getInstance();\r\n        \r\n        <span class=\"hljs-comment\">\/\/ \u83b7\u53d6\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\u7684\u5404\u4e2a\u90e8\u5206<\/span>\r\n        <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">year<\/span> <span class=\"hljs-operator\">=<\/span> calendar.get(Calendar.YEAR);\r\n        <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">month<\/span> <span class=\"hljs-operator\">=<\/span> calendar.get(Calendar.MONTH) + <span class=\"hljs-number\">1<\/span>; <span class=\"hljs-comment\">\/\/ \u6708\u4efd\u4ece0\u5f00\u59cb\uff0c\u6240\u4ee5\u8981\u52a01<\/span>\r\n        <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">day<\/span> <span class=\"hljs-operator\">=<\/span> calendar.get(Calendar.DAY_OF_MONTH);\r\n        <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">hour<\/span> <span class=\"hljs-operator\">=<\/span> calendar.get(Calendar.HOUR_OF_DAY);\r\n        <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">minute<\/span> <span class=\"hljs-operator\">=<\/span> calendar.get(Calendar.MINUTE);\r\n        <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">second<\/span> <span class=\"hljs-operator\">=<\/span> calendar.get(Calendar.SECOND);\r\n        \r\n        <span class=\"hljs-comment\">\/\/ \u683c\u5f0f\u5316\u65e5\u671f\u548c\u65f6\u95f4\u4e3a\u5b57\u7b26\u4e32\u5f62\u5f0f<\/span>\r\n        <span class=\"hljs-type\">SimpleDateFormat<\/span> <span class=\"hljs-variable\">sdf<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">SimpleDateFormat<\/span>(<span class=\"hljs-string\">\"yyyy-MM-dd HH:mm:ss\"<\/span>);\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">formattedDateTime<\/span> <span class=\"hljs-operator\">=<\/span> sdf.format(calendar.getTime());\r\n        \r\n        System.out.println(<span class=\"hljs-string\">\"\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\uff1a\"<\/span> + formattedDateTime);\r\n        System.out.println(<span class=\"hljs-string\">\"\u5e74\u4efd\uff1a\"<\/span> + year);\r\n        System.out.println(<span class=\"hljs-string\">\"\u6708\u4efd\uff1a\"<\/span> + month);\r\n        System.out.println(<span class=\"hljs-string\">\"\u65e5\u671f\uff1a\"<\/span> + day);\r\n        System.out.println(<span class=\"hljs-string\">\"\u5c0f\u65f6\uff1a\"<\/span> + hour);\r\n        System.out.println(<span class=\"hljs-string\">\"\u5206\u949f\uff1a\"<\/span> + minute);\r\n        System.out.println(<span class=\"hljs-string\">\"\u79d2\u949f\uff1a\"<\/span> + second);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u7d50\u679c\u3092\u51fa\u529b\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\uff1a2021-10-22 14:30:45\r\n\u5e74\u4efd\uff1a2021\r\n\u6708\u4efd\uff1a10\r\n\u65e5\u671f\uff1a22\r\n\u5c0f\u65f6\uff1a14\r\n\u5206\u949f\uff1a30\r\n\u79d2\u949f\uff1a45\r\n<\/code><\/pre>\n<p>Calendar\u30af\u30e9\u30b9\u306f\u62bd\u8c61\u30af\u30e9\u30b9\u3067\u3042\u308b\u305f\u3081\u3001\u76f4\u63a5\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u305d\u306e\u4ee3\u308f\u308a\u3001\u9759\u7684\u30e1\u30bd\u30c3\u30c9getInstance()\u3092\u547c\u3073\u51fa\u3057\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53d6\u5f97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u6708\u3092\u53d6\u5f97\u3059\u308b\u969b\u306b\u306f\u6708\u304c0\u304b\u3089\u6570\u3048\u3089\u308c\u308b\u3053\u3068\u306b\u6ce8\u610f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u30011\u3092\u52a0\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Calendar\u30af\u30e9\u30b9\u306fJava\u306b\u304a\u3044\u3066\u3001\u65e5\u4ed8\u3084\u6642\u9593\u306e\u64cd\u4f5c\u3092\u6271\u3046\u305f\u3081\u306e\u62bd\u8c61\u30af\u30e9\u30b9\u3067\u3059\u3002\u65e5\u4ed8\u3084\u6642\u9593\u306e\u8a08\u7b97\u3001\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3001\u89e3\u6790\u3092\u884c\u3046\u305f\u3081\u306e\u4e00\u9023\u306e\u9759\u7684\u30e1\u30bd\u30c3\u30c9\u3084\u5b9a\u6570\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u3059\u3002 \u4ee5\u4e0b\u306fCalendar\u30af\u30e9\u30b9\u306e\u4e00\u822c\u7684\u306a\u30e1 [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-28506","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u306eCalendar\u30af\u30e9\u30b9\u306e\u4f7f\u3044\u65b9\u306f\u3069\u3046\u3067\u3059\u304b\uff1f - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306ecalendar\u30af\u30e9\u30b9\u306e\u4f7f\u3044\u65b9\u306f\u3069\u3046\u3067\u3059\u304b\uff1f\/\" 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content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306ecalendar\u30af\u30e9\u30b9\u306e\u4f7f\u3044\u65b9\u306f\u3069\u3046\u3067\u3059\u304b\uff1f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-18T09:00:12+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-22T09:45:31+00:00\" \/>\n<meta name=\"author\" content=\"\u7d50\u8863, \u6625\u82b1\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u7d50\u8863, \u6625\u82b1\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u5206\" \/>\n<script type=\"application\/ld+json\" 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