{"id":29086,"date":"2024-03-18T19:57:13","date_gmt":"2024-03-18T10:57:13","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java-bigdecimal%e3%81%ae%e7%b2%be%e5%ba%a6%e3%82%92%e3%81%a9%e3%81%86%e8%a8%ad%e5%ae%9a%e3%81%99%e3%82%8c%e3%81%b0%e3%81%84%e3%81%84%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2024-03-22T20:09:28","modified_gmt":"2024-03-22T11:09:28","slug":"java-bigdecimal%e3%81%ae%e7%b2%be%e5%ba%a6%e3%82%92%e3%81%a9%e3%81%86%e8%a8%ad%e5%ae%9a%e3%81%99%e3%82%8c%e3%81%b0%e3%81%84%e3%81%84%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java-bigdecimal%e3%81%ae%e7%b2%be%e5%ba%a6%e3%82%92%e3%81%a9%e3%81%86%e8%a8%ad%e5%ae%9a%e3%81%99%e3%82%8c%e3%81%b0%e3%81%84%e3%81%84%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"Java BigDecimal\u306e\u7cbe\u5ea6\u3092\u3069\u3046\u8a2d\u5b9a\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f"},"content":{"rendered":"

Java\u3067\u3001\u6b63\u78ba\u306a10\u9032\u6570\u306e\u8a08\u7b97\u3092\u884c\u3046\u305f\u3081\u306bBigDecimal\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3001\u7cbe\u5ea6\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

BigDecimal\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u3001\u6587\u5b57\u5217\u307e\u305f\u306fdouble\u578b\u306e\u5024\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u3068\u3057\u3066\u53d7\u3051\u5165\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002double\u578b\u306e\u5024\u304c\u6e21\u3055\u308c\u308b\u5834\u5408\u3001\u81ea\u52d5\u7684\u306b\u6587\u5b57\u5217\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001setScale\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u7cbe\u5ea6\u3092\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u4ee5\u4e0b\u306f\u4e00\u3064\u306e\u4f8b\u3067\u3059\u3002<\/p>\n

import java.math.BigDecimal;\r\n\r\npublic class Main {\r\n    public static void main(String[] args) {\r\n        BigDecimal number1 = new BigDecimal(\"10.345\");\r\n        BigDecimal number2 = new BigDecimal(\"20.1234\");\r\n        \r\n        BigDecimal result = number1.add(number2);\r\n        \r\n        result = result.setScale(2, BigDecimal.ROUND_HALF_UP);\r\n        \r\n        System.out.println(result); \/\/ \u8f93\u51fa30.47\r\n    }\r\n}\r\n<\/code><\/pre>\n
\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u300110.345\u306820.1234\u3092\u8868\u30592\u3064\u306eBigDecimal\u30aa\u30d6\u30b8\u30a7\u30af\u30c8number1\u3068number2\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002\u305d\u3057\u3066\u3001add\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3053\u308c\u30892\u3064\u306e\u6570\u5024\u3092\u52a0\u7b97\u3057\u3001\u7d50\u679c\u3092result\u5909\u6570\u306b\u4fdd\u5b58\u3057\u307e\u3057\u305f\u3002\u305d\u306e\u5f8c\u3001setScale\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u7cbe\u5ea6\u30922\u306b\u8a2d\u5b9a\u3057\u3001ROUND_HALF_UP\u3092\u6307\u5b9a\u3057\u3066\u56db\u6368\u4e94\u5165\u306e\u30eb\u30fc\u30eb\u3092\u9069\u7528\u3057\u307e\u3057\u305f\u3002\u6700\u5f8c\u306b\u3001\u7d50\u679c\u309230.47\u3068\u51fa\u529b\u3057\u307e\u3057\u305f\u3002<\/p>\n
\u6ce8\u610f\uff0csetScale\u30e1\u30bd\u30c3\u30c9\u306e\u6700\u521d\u306e\u5f15\u6570\u306f\u7cbe\u5ea6\u3067\u3042\u308a\u30012\u756a\u76ee\u306e\u5f15\u6570\u306f\u4f7f\u7528\u3059\u308b\u4e38\u3081\u30e2\u30fc\u30c9\u3067\u3059\u3002\u4e00\u822c\u7684\u306a\u4e38\u3081\u30e2\u30fc\u30c9\u306b\u306f\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n
    \n
  1. ROUND_UP: \u30bc\u30ed\u304b\u3089\u96e2\u308c\u305f\u65b9\u5411\u306b\u5207\u308a\u4e0a\u3052\u307e\u3059\u3002<\/li>\n
  2. ROUND_DOWN: \u30bc\u30ed\u65b9\u5411\u306b\u5207\u308a\u6368\u3066<\/li>\n
  3. ROUND_CEILING\uff1a\u6b63\u306e\u7121\u9650\u65b9\u5411\u3078\u306e\u5207\u308a\u4e0a\u3052<\/li>\n
  4. ROUND_FLOOR\uff1a-\u221e\u306b\u5411\u304b\u3063\u3066\u5207\u308a\u6368\u3066<\/li>\n
  5. ROUND_HALF_UP\uff1a\u6570\u5b57\u3092\u6700\u3082\u8fd1\u3044\u6574\u6570\u306b\u4e38\u3081\u307e\u3059\u3002\u5c11\u6570\u7b2c\u4e00\u4f4d\u304c5\u3088\u308a\u5927\u304d\u3044\u5834\u5408\u3001\u5207\u308a\u4e0a\u3052\u307e\u3059\u3002\u305d\u308c\u4ee5\u5916\u306e\u5834\u5408\u306f\u5207\u308a\u6368\u3066\u307e\u3059\u3002<\/li>\n
  6. \u56db\u6368\u4e94\u5165\u65b9\u5f0f\uff1a\u6700\u65b0\u306e\u6570\u5b57\u306e\u4e38\u3081\u51e6\u7406\uff085\u4ee5\u4e0b\u5207\u308a\u6368\u3066\uff09\u3002\u5c0f\u6570\u70b9\u4ee5\u4e0b\u4e00\u6841\u304c5\u4ee5\u4e0a\u306e\u5834\u5408\u306f\u5207\u308a\u4e0a\u3052\u3001\u305d\u3046\u3067\u306a\u3051\u308c\u3070\u5207\u308a\u6368\u3066\u308b\u3002<\/li>\n
  7. ROUND_HALF_EVEN\uff1a\u6700\u8fd1\u6570\u5b57\u306e\u56db\u6368\u4e94\u5165\u3002\u6b8b\u3055\u308c\u305f\u6841\u306e\u6b21\u306e\u6841\u304c5\u3088\u308a\u5927\u304d\u3044\u5834\u5408\u306f\u5207\u308a\u4e0a\u3052\u3001\u6b21\u306e\u6841\u304c5\u672a\u6e80\u306e\u5834\u5408\u306f\u5207\u308a\u6368\u3066\u3001\u6b21\u306e\u6841\u304c5\u3067\u3042\u308a\u3001\u304b\u3064\u305d\u306e\u5f8c\u308d\u306e\u3059\u3079\u3066\u306e\u6841\u304c0\u306e\u5834\u5408\u306f\u5207\u308a\u6368\u3066\u307e\u3059\u3002<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
    Java\u3067\u3001\u6b63\u78ba\u306a10\u9032\u6570\u306e\u8a08\u7b97\u3092\u884c\u3046\u305f\u3081\u306bBigDecimal\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3001\u7cbe\u5ea6\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 BigDecimal\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u3001\u6587\u5b57\u5217\u307e\u305f\u306fdouble\u578b\u306e\u5024\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u3068\u3057\u3066\u53d7\u3051\u5165\u308c\u308b\u3053 […]<\/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-29086","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nJava BigDecimal\u306e\u7cbe\u5ea6\u3092\u3069\u3046\u8a2d\u5b9a\u3059\u308c\u3070\u3044\u3044\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-bigdecimal\u306e\u7cbe\u5ea6\u3092\u3069\u3046\u8a2d\u5b9a\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java BigDecimal\u306e\u7cbe\u5ea6\u3092\u3069\u3046\u8a2d\u5b9a\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f\" \/>\n<meta property=\"og:description\" content=\"Java\u3067\u3001\u6b63\u78ba\u306a10\u9032\u6570\u306e\u8a08\u7b97\u3092\u884c\u3046\u305f\u3081\u306bBigDecimal\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3001\u7cbe\u5ea6\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 BigDecimal\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u3001\u6587\u5b57\u5217\u307e\u305f\u306fdouble\u578b\u306e\u5024\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u3068\u3057\u3066\u53d7\u3051\u5165\u308c\u308b\u3053 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java-bigdecimal\u306e\u7cbe\u5ea6\u3092\u3069\u3046\u8a2d\u5b9a\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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