{"id":125615,"date":"2024-03-24T19:32:05","date_gmt":"2024-03-24T10:32:05","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/decimalformat-format%e3%82%88%e3%82%8a%e9%ab%98%e9%80%9f%e3%81%aa%e4%bb%a3%e6%9b%bf%e6%a1%88\/"},"modified":"2024-04-04T22:51:20","modified_gmt":"2024-04-04T13:51:20","slug":"decimalformat-format%e3%82%88%e3%82%8a%e9%ab%98%e9%80%9f%e3%81%aa%e4%bb%a3%e6%9b%bf%e6%a1%88","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/decimalformat-format%e3%82%88%e3%82%8a%e9%ab%98%e9%80%9f%e3%81%aa%e4%bb%a3%e6%9b%bf%e6%a1%88\/","title":{"rendered":"DecimalFormat.format()\u3088\u308a\u9ad8\u901f\u306a\u4ee3\u66ff\u6848"},"content":{"rendered":"

\u30cd\u30a4\u30c6\u30a3\u30d6\u306b\u65e5\u672c\u8a9e\u3067\u8a00\u3044\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u30021\u3064\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u307f\u304c\u5fc5\u8981\u3067\u3059\u3002DecimalFormat.format()\u306fJava\u3067\u6570\u5b57\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u305f\u3081\u306e\u30af\u30e9\u30b9\u3067\u3059\u304c\u3001\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u3068\u52b9\u7387\u304c\u4f4e\u4e0b\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u3088\u308a\u9ad8\u901f\u306a\u4ee3\u66ff\u6848\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n

    \n
  1. StringBuilder\u30af\u30e9\u30b9\u3067\u66f8\u5f0f\u4ed8\u304d\u6587\u5b57\u5217\u3092\u69cb\u7bc9\u3057\u3001\u305d\u308c\u304b\u3089\u6570\u5024\u578b\u306b\u5909\u63db\u3059\u308b\u3002<\/li>\n<\/ol>\n
    StringBuilder<\/span> sb<\/span> =<\/span> new<\/span> StringBuilder<\/span>();\r\nsb.append(\"#,###.##\"<\/span>);\r\nString<\/span> formattedNumber<\/span> =<\/span> sb.toString();\r\ndouble<\/span> number<\/span> =<\/span> 1000000.1234<\/span>;\r\nString<\/span> result<\/span> =<\/span> String.format(formattedNumber, number);\r\n<\/code><\/pre>\n
      \n
    1. \u6570\u5024\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u306b\u306f\u3001NumberFormat \u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3002<\/li>\n<\/ol>\n
      NumberFormat<\/span> nf<\/span> =<\/span> NumberFormat.getInstance();\r\nnf.setMaximumFractionDigits(2<\/span>);\r\nnf.setGroupingUsed(true<\/span>);\r\ndouble<\/span> number<\/span> =<\/span> 1000000.1234<\/span>;\r\nString<\/span> result<\/span> =<\/span> nf.format(number);\r\n<\/code><\/pre>\n
        \n
      1. DecimalFormatSymbols: \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u6570\u5b57\u306e\u30b7\u30f3\u30dc\u30eb\u3092\u5b9a\u7fa9\u3059\u308b\u305f\u3081\u306b\u3001DecimalFormatSymbols\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n
        DecimalFormatSymbols<\/span> symbols<\/span> =<\/span> new<\/span> DecimalFormatSymbols<\/span>();\r\nsymbols.setDecimalSeparator('.'<\/span>);\r\nsymbols.setGroupingSeparator(','<\/span>);\r\nDecimalFormat<\/span> df<\/span> =<\/span> new<\/span> DecimalFormat<\/span>(\"#,###.##\"<\/span>, symbols);\r\ndouble<\/span> number<\/span> =<\/span> 1000000.1234<\/span>;\r\nString<\/span> result<\/span> =<\/span> df.format(number);\r\n<\/code><\/pre>\n
        \u3053\u308c\u3089\u306e\u9078\u629e\u80a2\u306f\u5834\u5408\u3084\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306b\u3088\u3063\u3066\u52b9\u679c\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u5b9f\u969b\u306e\u72b6\u6cc1\u306b\u6700\u3082\u9069\u3057\u305f\u3082\u306e\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
        \u30cd\u30a4\u30c6\u30a3\u30d6\u306b\u65e5\u672c\u8a9e\u3067\u8a00\u3044\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u30021\u3064\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u307f\u304c\u5fc5\u8981\u3067\u3059\u3002DecimalFormat.format()\u306fJava\u3067\u6570\u5b57\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u305f\u3081\u306e\u30af\u30e9\u30b9\u3067\u3059\u304c\u3001\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u3068\u52b9\u7387\u304c\u4f4e\u4e0b\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-125615","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nDecimalFormat.format()\u3088\u308a\u9ad8\u901f\u306a\u4ee3\u66ff\u6848 - 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\/decimalformat-format\u3088\u308a\u9ad8\u901f\u306a\u4ee3\u66ff\u6848\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DecimalFormat.format()\u3088\u308a\u9ad8\u901f\u306a\u4ee3\u66ff\u6848\" \/>\n<meta property=\"og:description\" content=\"\u30cd\u30a4\u30c6\u30a3\u30d6\u306b\u65e5\u672c\u8a9e\u3067\u8a00\u3044\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u30021\u3064\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u307f\u304c\u5fc5\u8981\u3067\u3059\u3002DecimalFormat.format()\u306fJava\u3067\u6570\u5b57\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u305f\u3081\u306e\u30af\u30e9\u30b9\u3067\u3059\u304c\u3001\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u3068\u52b9\u7387\u304c\u4f4e\u4e0b\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/decimalformat-format\u3088\u308a\u9ad8\u901f\u306a\u4ee3\u66ff\u6848\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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