{"id":78574,"date":"2024-03-20T20:00:50","date_gmt":"2024-03-20T11:00:50","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a72%e3%81%a4%e3%81%ae%e6%97%a5%e4%bb%98%e3%81%ae%e5%b7%ae%ef%bc%88%e6%97%a5%e6%95%b0%ef%bc%89%e3%82%92%e5%8f%96%e5%be%97%e3%81%99%e3%82%8b%e3%81%ab%e3%81%af%e3%81%a9%e3%81%86%e3%81%99\/"},"modified":"2025-08-12T02:51:32","modified_gmt":"2025-08-11T17:51:32","slug":"java%e3%81%a72%e3%81%a4%e3%81%ae%e6%97%a5%e4%bb%98%e3%81%ae%e5%b7%ae%ef%bc%88%e6%97%a5%e6%95%b0%ef%bc%89%e3%82%92%e5%8f%96%e5%be%97%e3%81%99%e3%82%8b%e3%81%ab%e3%81%af%e3%81%a9%e3%81%86%e3%81%99","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a72%e3%81%a4%e3%81%ae%e6%97%a5%e4%bb%98%e3%81%ae%e5%b7%ae%ef%bc%88%e6%97%a5%e6%95%b0%ef%bc%89%e3%82%92%e5%8f%96%e5%be%97%e3%81%99%e3%82%8b%e3%81%ab%e3%81%af%e3%81%a9%e3%81%86%e3%81%99\/","title":{"rendered":"Java\u30672\u3064\u306e\u65e5\u4ed8\u306e\u5dee\uff08\u65e5\u6570\uff09\u3092\u53d6\u5f97\u3059\u308b\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3088\u3044\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<p>Java\u3067\u306f\u3001java.time\u30d1\u30c3\u30b1\u30fc\u30b8\u306eLocalDate\u30af\u30e9\u30b9\u3068ChronoUnit\u5217\u6319\u578b\u3067\u65e5\u4ed8\u9593\u306e\u5dee\u65e5\u3092\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u6b21\u306b\u3001\u30b5\u30f3\u30d7\u30eb\u306e\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.time.LocalDate;\r\n<span class=\"hljs-keyword\">import<\/span> java.time.temporal.ChronoUnit;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">Main<\/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\">LocalDate<\/span> <span class=\"hljs-variable\">date1<\/span> <span class=\"hljs-operator\">=<\/span> LocalDate.of(<span class=\"hljs-number\">2020<\/span>, <span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">1<\/span>);\r\n        <span class=\"hljs-type\">LocalDate<\/span> <span class=\"hljs-variable\">date2<\/span> <span class=\"hljs-operator\">=<\/span> LocalDate.of(<span class=\"hljs-number\">2020<\/span>, <span class=\"hljs-number\">12<\/span>, <span class=\"hljs-number\">31<\/span>);\r\n\r\n        <span class=\"hljs-type\">long<\/span> <span class=\"hljs-variable\">daysBetween<\/span> <span class=\"hljs-operator\">=<\/span> ChronoUnit.DAYS.between(date1, date2);\r\n        System.out.println(<span class=\"hljs-string\">\"Days between date1 and date2: \"<\/span> + daysBetween);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001\u307e\u305aLocalDate.of()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u30662\u3064\u306e\u6642\u70b9date1\u3068date2\u3092\u4f5c\u6210\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001ChronoUnit.DAYS.between()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u30012\u3064\u306e\u6642\u70b9\u306e\u9593\u3092\u65e5\u6570\u3067\u8a08\u7b97\u3057\u3001\u305d\u306e\u7d50\u679c\u3092daysBetween\u3068\u3044\u3046\u5909\u6570\u306b\u683c\u7d0d\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u6700\u5f8c\u306b\u3001\u7d50\u679c\u3092\u51fa\u529b\u3057\u307e\u3059\u3002\u3053\u306e\u4f8b\u3067\u306f\u3001\u51fa\u529b\u7d50\u679c\u306fDays between date1 and date2: 364\u3068\u306a\u308a\u3001date1\u3068date2\u306e\u9593\u306e\u65e5\u6570\u304c364\u65e5\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u306f\u3001java.time\u30d1\u30c3\u30b1\u30fc\u30b8\u306eLocalDate\u30af\u30e9\u30b9\u3068ChronoUnit\u5217\u6319\u578b\u3067\u65e5\u4ed8\u9593\u306e\u5dee\u65e5\u3092\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002 \u6b21\u306b\u3001\u30b5\u30f3\u30d7\u30eb\u306e\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002 import java.time.LocalDate;  [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-78574","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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