{"id":127029,"date":"2024-03-25T00:49:16","date_gmt":"2024-03-24T15:49:16","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java-decimalformat-%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9\/"},"modified":"2024-03-28T00:31:39","modified_gmt":"2024-03-27T15:31:39","slug":"java-decimalformat-%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java-decimalformat-%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9\/","title":{"rendered":"java DecimalFormat \u306e\u4f7f\u3044\u65b9"},"content":{"rendered":"

DecimalFormat\u306f\u3001java.text\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u30af\u30e9\u30b9\u3067\u3001\u6570\u5024\u3068\u901a\u8ca8\u5024\u306e\u51fa\u529b\u3092\u66f8\u5f0f\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001DecimalFormat\u306e\u4e00\u822c\u7684\u306a\u4f7f\u7528\u6cd5\u3067\u3059\u3002<\/p>\n

    \n
  1. DecimalFormat\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3059\u308b\uff1a<\/li>\n<\/ol>\n
    DecimalFormat decimalFormat = new DecimalFormat(pattern);\r\n<\/code><\/pre>\n
    \u30d1\u30bf\u30f3\u306f\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u53ef\u80fd\u306a\u66f8\u5f0f\u3092\u8868\u3059\u6587\u5b57\u5217\u3067\u3059\u3002\u4f8b\u3048\u3070\u300c#,##0.00\u300d\u306f\u3001\u5343\u5358\u4f4d\u306e\u533a\u5207\u308a\u30682\u6841\u306e\u5c0f\u6570\u70b9\u3092\u4f7f\u7528\u3059\u308b\u66f8\u5f0f\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n
      \n
    1. \u6570\u5b57\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5316<\/li>\n<\/ol>\n
      double number = 12345.6789;\r\nString formattedNumber = decimalFormat.format(number);\r\nSystem.out.println(formattedNumber);\r\n<\/code><\/pre>\n
      \u51fa\u529b\u304c\u300c12,345.68\u300d\u306b\u306a\u308b<\/p>\n
        \n
      1. \u5c11\u6570\u6841\u6570\u306e\u8a2d\u5b9a<\/li>\n<\/ol>\n
        decimalFormat.setMaximumFractionDigits(3); \/\/ \u8bbe\u7f6e\u6700\u591a\u4fdd\u7559\u4e09\u4f4d\u5c0f\u6570\r\ndecimalFormat.setMinimumFractionDigits(2); \/\/ \u8bbe\u7f6e\u6700\u5c11\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\r\n<\/code><\/pre>\n
          \n
        1. 1,000 \u306e\u6841\u533a\u5207\u308a\u8a18\u53f7\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n
          decimalFormat.setGroupingUsed(true); \/\/ \u542f\u7528\u5343\u4f4d\u5206\u9694\u7b26\r\ndecimalFormat.setGroupingSize(3); \/\/ \u8bbe\u7f6e\u5343\u4f4d\u5206\u9694\u7b26\u7684\u4f4d\u6570\uff0c\u9ed8\u8ba4\u4e3a3\r\n<\/code><\/pre>\n
            \n
          1. \u901a\u8ca8\u5024\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5316\u3059\u308b<\/li>\n<\/ol>\n
            double currency = 50000.5;\r\ndecimalFormat.setCurrency(Currency.getInstance(\"USD\")); \/\/ \u8bbe\u7f6e\u8d27\u5e01\u4e3a\u7f8e\u5143\r\nString formattedCurrency = decimalFormat.format(currency);\r\nSystem.out.println(formattedCurrency);\r\n<\/code><\/pre>\n
            \u300cUSD 50,000.50\u300d\u3092\u51fa\u529b\u3057\u307e\u3059\u3002<\/p>\n
              \n
            1. \u901a\u8ca8\u8a18\u53f7\u306e\u4f4d\u7f6e\u3092\u8a2d\u5b9a\uff1a<\/li>\n<\/ol>\n
              decimalFormat.setPositivePrefix(\"$\"); \/\/ \u8bbe\u7f6e\u6b63\u6570\u524d\u7f00\u4e3a$\r\ndecimalFormat.setNegativePrefix(\"-$\"); \/\/ \u8bbe\u7f6e\u8d1f\u6570\u524d\u7f00\u4e3a-$\r\n<\/code><\/pre>\n
              DecimalFormat\u306e\u4e00\u822c\u7684\u306a\u4f7f\u3044\u65b9\u306f\u4e0a\u8a18\u306e\u3068\u304a\u308a\u3067\u3059\u304c\u3001\u5177\u4f53\u7684\u306a\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u8abf\u6574\u3084\u62e1\u5f35\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
              DecimalFormat\u306f\u3001java.text\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u30af\u30e9\u30b9\u3067\u3001\u6570\u5024\u3068\u901a\u8ca8\u5024\u306e\u51fa\u529b\u3092\u66f8\u5f0f\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001DecimalFormat\u306e\u4e00\u822c\u7684\u306a\u4f7f\u7528\u6cd5\u3067\u3059\u3002 DecimalFormat\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092 […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-127029","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\njava DecimalFormat \u306e\u4f7f\u3044\u65b9 - 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-decimalformat-\u306e\u4f7f\u3044\u65b9\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"java DecimalFormat \u306e\u4f7f\u3044\u65b9\" \/>\n<meta property=\"og:description\" content=\"DecimalFormat\u306f\u3001java.text\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u30af\u30e9\u30b9\u3067\u3001\u6570\u5024\u3068\u901a\u8ca8\u5024\u306e\u51fa\u529b\u3092\u66f8\u5f0f\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001DecimalFormat\u306e\u4e00\u822c\u7684\u306a\u4f7f\u7528\u6cd5\u3067\u3059\u3002 DecimalFormat\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java-decimalformat-\u306e\u4f7f\u3044\u65b9\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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