{"id":23520,"date":"2024-03-16T22:34:56","date_gmt":"2024-03-16T13:34:56","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%aebigdecimal%e3%81%ab%e3%81%af%e3%80%81%e5%b0%8f%e6%95%b0%e7%82%b9%e4%bb%a5%e4%b8%8b2%e6%a1%81%e3%82%92%e4%bf%9d%e6%8c%81%e3%81%99%e3%82%8b%e3%81%93%e3%81%a8%e3%81%8c%e3%81%a7%e3%81%8d\/"},"modified":"2025-08-07T16:12:49","modified_gmt":"2025-08-07T07:12:49","slug":"java%e3%81%aebigdecimal%e3%81%ab%e3%81%af%e3%80%81%e5%b0%8f%e6%95%b0%e7%82%b9%e4%bb%a5%e4%b8%8b2%e6%a1%81%e3%82%92%e4%bf%9d%e6%8c%81%e3%81%99%e3%82%8b%e3%81%93%e3%81%a8%e3%81%8c%e3%81%a7%e3%81%8d","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%aebigdecimal%e3%81%ab%e3%81%af%e3%80%81%e5%b0%8f%e6%95%b0%e7%82%b9%e4%bb%a5%e4%b8%8b2%e6%a1%81%e3%82%92%e4%bf%9d%e6%8c%81%e3%81%99%e3%82%8b%e3%81%93%e3%81%a8%e3%81%8c%e3%81%a7%e3%81%8d\/","title":{"rendered":"Java\u306eBigDecimal\u306b\u306f\u3001\u5c0f\u6570\u70b9\u4ee5\u4e0b2\u6841\u3092\u4fdd\u6301\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002"},"content":{"rendered":"<p>Java\u3067\u306f\u3001BigDecimal\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u3001\u6570\u5b57\u306e\u8a08\u7b97\u3092\u6b63\u78ba\u306b\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u3001\u5c0f\u6570\u70b9\u4ee5\u4e0b\u306e\u6841\u6570\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u30012\u6841\u306e\u5c0f\u6570\u70b9\u3092\u4fdd\u6301\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3059\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>import java.math.BigDecimal;\r\n\r\npublic class Main {\r\n    public static void main(String[] args) {\r\n        \/\/ \u521b\u5efa\u4e00\u4e2aBigDecimal\u5bf9\u8c61\uff0c\u4f20\u5165\u9700\u8981\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u7684\u6570\u503c\r\n        BigDecimal number = new BigDecimal(\"3.1415926\");\r\n\r\n        \/\/ \u4f7f\u7528setScale\u65b9\u6cd5\u8bbe\u7f6e\u4fdd\u7559\u5c0f\u6570\u7684\u4f4d\u6570\uff0c\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a\u4fdd\u7559\u7684\u5c0f\u6570\u4f4d\u6570\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4e3a\u820d\u5165\u6a21\u5f0f\r\n        \/\/ RoundingMode.HALF_UP\u8868\u793a\u56db\u820d\u4e94\u5165\r\n        BigDecimal result = number.setScale(2, BigDecimal.ROUND_HALF_UP);\r\n\r\n        \/\/ \u6253\u5370\u7ed3\u679c\r\n        System.out.println(result);  \/\/ \u8f93\u51fa\u7ed3\u679c\u4e3a3.14\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001BigDecimal\u306esetScale\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u5c0f\u6570\u70b9\u4ee5\u4e0b2\u6841\u3092\u4fdd\u6301\u3057\u3001\u56db\u6368\u4e94\u5165\u306e\u7aef\u6570\u51e6\u7406\u30e2\u30fc\u30c9\u3092\u9069\u7528\u3057\u307e\u3057\u305f\u3002\u6700\u5f8c\u306b\u3001\u7d50\u679c\u30923.14\u3068\u51fa\u529b\u3057\u307e\u3057\u305f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u306f\u3001BigDecimal\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u3001\u6570\u5b57\u306e\u8a08\u7b97\u3092\u6b63\u78ba\u306b\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u3001\u5c0f\u6570\u70b9\u4ee5\u4e0b\u306e\u6841\u6570\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u30012\u6841\u306e\u5c0f\u6570\u70b9\u3092\u4fdd\u6301\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3059\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002 import java.mat [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-23520","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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