{"id":76513,"date":"2024-03-20T17:13:10","date_gmt":"2024-03-20T08:13:10","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%83%ad%e3%82%b0%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ab%e5%87%ba%e5%8a%9b%e3%81%95%e3%82%8c%e3%81%be%e3%81%99%e3%81%8b\/"},"modified":"2025-08-11T17:06:31","modified_gmt":"2025-08-11T08:06:31","slug":"java%e3%83%ad%e3%82%b0%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ab%e5%87%ba%e5%8a%9b%e3%81%95%e3%82%8c%e3%81%be%e3%81%99%e3%81%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%83%ad%e3%82%b0%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ab%e5%87%ba%e5%8a%9b%e3%81%95%e3%82%8c%e3%81%be%e3%81%99%e3%81%8b\/","title":{"rendered":"Java\u30ed\u30b0\u306f\u3069\u306e\u3088\u3046\u306b\u30d5\u30a1\u30a4\u30eb\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u304b"},"content":{"rendered":"<p>Java\u3067\u306f\u3001java.util.logging\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u4f7f\u7528\u3057\u3066\u3001\u30ed\u30b0\u51fa\u529b\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u306b\u30ed\u30b0\u3092\u51fa\u529b\u3059\u308b\u306b\u306f\u3001FileHandler\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u7c21\u5358\u306a\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.io.IOException;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.logging.FileHandler;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.logging.Level;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.logging.Logger;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.logging.SimpleFormatter;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">LogToFileExample<\/span> {\r\n\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\">Logger<\/span> <span class=\"hljs-variable\">logger<\/span> <span class=\"hljs-operator\">=<\/span> Logger.getLogger(LogToFileExample.class.getName());\r\n\r\n        <span class=\"hljs-keyword\">try<\/span> {\r\n            <span class=\"hljs-comment\">\/\/ \u521b\u5efa\u4e00\u4e2aFileHandler\uff0c\u6307\u5b9a\u65e5\u5fd7\u8f93\u51fa\u6587\u4ef6\u7684\u8def\u5f84\u548c\u6587\u4ef6\u540d<\/span>\r\n            <span class=\"hljs-type\">FileHandler<\/span> <span class=\"hljs-variable\">fileHandler<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">FileHandler<\/span>(<span class=\"hljs-string\">\"log.txt\"<\/span>);\r\n            <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6e\u65e5\u5fd7\u8f93\u51fa\u683c\u5f0f\u4e3aSimpleFormatter<\/span>\r\n            fileHandler.setFormatter(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">SimpleFormatter<\/span>());\r\n\r\n            <span class=\"hljs-comment\">\/\/ \u5c06FileHandler\u6dfb\u52a0\u5230logger\u4e2d<\/span>\r\n            logger.addHandler(fileHandler);\r\n\r\n            <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6e\u65e5\u5fd7\u7ea7\u522b\u4e3aFINE\uff08\u8f93\u51fa\u6240\u6709\u7ea7\u522b\u7684\u65e5\u5fd7\uff09<\/span>\r\n            logger.setLevel(Level.FINE);\r\n\r\n            <span class=\"hljs-comment\">\/\/ \u8f93\u51fa\u65e5\u5fd7<\/span>\r\n            logger.severe(<span class=\"hljs-string\">\"This is a severe message\"<\/span>);\r\n            logger.warning(<span class=\"hljs-string\">\"This is a warning message\"<\/span>);\r\n            logger.info(<span class=\"hljs-string\">\"This is an info message\"<\/span>);\r\n            logger.fine(<span class=\"hljs-string\">\"This is a fine message\"<\/span>);\r\n            logger.finest(<span class=\"hljs-string\">\"This is a finest message\"<\/span>);\r\n\r\n        } <span class=\"hljs-keyword\">catch<\/span> (IOException e) {\r\n            e.printStackTrace();\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u300clog.txt\u300d\u3068\u3044\u3046\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3055\u308c\u3001\u51fa\u529b\u3055\u308c\u305f\u30ed\u30b0\u60c5\u5831\u304c\u8a18\u9332\u3055\u308c\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u306f\u3001java.util.logging\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u4f7f\u7528\u3057\u3066\u3001\u30ed\u30b0\u51fa\u529b\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u306b\u30ed\u30b0\u3092\u51fa\u529b\u3059\u308b\u306b\u306f\u3001FileHandler\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u7c21\u5358\u306a\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002 import java. [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-76513","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) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u30ed\u30b0\u306f\u3069\u306e\u3088\u3046\u306b\u30d5\u30a1\u30a4\u30eb\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u304b - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Java\u30ed\u30b0\u306f\u3069\u306e\u3088\u3046\u306b\u30d5\u30a1\u30a4\u30eb\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u304b\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\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\u30ed\u30b0\u306f\u3069\u306e\u3088\u3046\u306b\u30d5\u30a1\u30a4\u30eb\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u304b\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u30ed\u30b0\u306f\u3069\u306e\u3088\u3046\u306b\u30d5\u30a1\u30a4\u30eb\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u304b\" \/>\n<meta property=\"og:description\" content=\"Java\u30ed\u30b0\u306f\u3069\u306e\u3088\u3046\u306b\u30d5\u30a1\u30a4\u30eb\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u304b\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u30ed\u30b0\u306f\u3069\u306e\u3088\u3046\u306b\u30d5\u30a1\u30a4\u30eb\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u304b\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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