{"id":284,"date":"2017-01-17T16:00:00","date_gmt":"2017-01-17T07:00:00","guid":{"rendered":"https:\/\/java-code.jp\/?p=284"},"modified":"2017-01-17T16:00:12","modified_gmt":"2017-01-17T07:00:12","slug":"%e6%95%b0%e5%80%a4%e3%82%92%e6%95%b4%e5%bd%a2%e3%81%99%e3%82%8b","status":"publish","type":"post","link":"https:\/\/java-code.jp\/284","title":{"rendered":"NumberFormat\u30af\u30e9\u30b9"},"content":{"rendered":"

\u6570\u5024\u3092\u6574\u5f62\u3059\u308b – NumberFormat\u30af\u30e9\u30b9<\/em><\/p>\n

\n
public static NumberFormat getInstance([Locale loc])<\/dt>\n
public static NumberFormat getCurrencyInstance([Locale loc])<\/dt>\n
public static NumberFormat getIntegerInstance([Locale loc])<\/dt>\n
public static NumberFormat getPercentInstance([Locale loc])<\/dt>\n
loc\uff1a\u30ed\u30b1\u30fc\u30eb<\/dd>\n<\/dl>\n

\u6570\u5024\u30c7\u30fc\u30bf\u3092\u6574\u5f62\u3059\u308b\u306b\u306f\u3001NumberFormat\u30af\u30e9\u30b9\uff08java.text\u30d1\u30c3\u30b1\u30fc\u30b8\uff09\u3092\u5229\u7528\u3057\u307e\u3059\u3002NumberFormat\u30af\u30e9\u30b9\u3067\u306f\u3001\uff08new\u6f14\u7b97\u5b50\u3067\u306f\u306a\u304f\uff09\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30e1\u30bd\u30c3\u30c9\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n\n\n\n\n
NumberFormat\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u751f\u6210\u306e\u305f\u3081\u306e\u30e1\u30bd\u30c3\u30c9<\/th>\n<\/tr>\n
\u30e1\u30bd\u30c3\u30c9<\/th>\n\u6982\u8981<\/th>\n<\/tr>\n
getInstance<\/td>\n\u6c4e\u7528\u7684\u306a\u6570\u5024\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/td>\n<\/tr>\n
getCurrencyInstance<\/td>\n\u901a\u8ca8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/td>\n<\/tr>\n
getIntegerInstance<\/td>\n\u6574\u6570\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/td>\n<\/tr>\n
getPercentInstance<\/td>\n\u30d1\u30fc\u30bb\u30f3\u30c8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/td>\n<\/tr>\n<\/table>\n

\u4ee5\u4e0b\u3067\u306f\u3001\u305d\u308c\u305e\u308c\u306egetXxxxxInstance\u30e1\u30bd\u30c3\u30c9\u3067\u751f\u6210\u3057\u305fNumberFormat\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5229\u7528\u3057\u3066\u3001\u6570\u5024\u3092\u6574\u5f62\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n

UtilNumber.java<\/p>\n

\n
\r\npackage com.example.mynavi.util;\r\n\r\nimport java.text.NumberFormat;\r\nimport java.util.Locale;\r\n\r\npublic class UtilNumber {\r\n  public static void main(String[] args) {\r\n    double num = 1128.5645;\r\n    \/\/ \u901a\u8ca8\u5f62\u5f0f\u3067\u6574\u5f62\r\n    NumberFormat nf = NumberFormat.getCurrencyInstance(Locale.JAPAN);\r\n    nf.setGroupingUsed(true);\r\n    nf.setMaximumFractionDigits(3);\r\n    nf.setMinimumFractionDigits(2);\r\n    System.out.println(nf.format(num));\t\/\/ \u7d50\u679c\uff1a\uffe51,128.564\r\n    \r\n    double num2 = 0.45678;\r\n    \/\/ \u30d1\u30fc\u30bb\u30f3\u30c8\u5f62\u5f0f\u3067\u6574\u5f62\r\n    NumberFormat nf2 = NumberFormat.getPercentInstance();\r\n    nf2.setGroupingUsed(true);\r\n    nf2.setMinimumIntegerDigits(3);\r\n    nf2.setMaximumFractionDigits(2);\r\n    System.out.println(nf2.format(num2));\t\/\/ \u7d50\u679c\uff1a045.68%\r\n  }\r\n}\r\n<\/pre>\n
<\/div>\n
NumberFormat\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30bb\u30c3\u30bf\u30fc\u30e1\u30bd\u30c3\u30c9\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n\n\n\n\n\n\n
\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u8a2d\u5b9a\u306e\u305f\u3081\u306e\u30e1\u30bd\u30c3\u30c9<\/th>\n<\/tr>\n
\u30e1\u30bd\u30c3\u30c9<\/th>\n\u6982\u8981<\/th>\n<\/tr>\n
void setCurrency(Currency cur)<\/td>\n\u901a\u8ca8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u5229\u7528\u3059\u308b\u901a\u8ca8<\/td>\n<\/tr>\n
void setGroupingUsed(boolean flag)<\/td>\n\u6841\u533a\u5207\u308a\u6587\u5b57\uff08,\uff09\u3092\u5229\u7528\u3059\u308b\u304b<\/td>\n<\/tr>\n
void setMaximumFractionDigits(int max)<\/td>\n\u5c0f\u6570\u90e8\u5206\u306e\u6700\u5927\u6841\u6570<\/td>\n<\/tr>\n
void setMaximumIntegerDigits(int max)<\/td>\n\u6574\u6570\u90e8\u5206\u306e\u6700\u5927\u6841\u6570<\/td>\n<\/tr>\n
void setMinimumFractionDigits(int min)<\/td>\n\u5c0f\u6570\u90e8\u5206\u306e\u6700\u5c0f\u6841\u6570<\/td>\n<\/tr>\n
void setMinimumIntegerDigits(int min)<\/td>\n\u6574\u6570\u90e8\u5206\u306e\u6700\u5c0f\u6841\u6570<\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"
\u6570\u5024\u3092\u6574\u5f62\u3059\u308b – NumberFormat\u30af\u30e9\u30b9 public static NumberFormat getInstance([Locale loc]) public static NumberForma […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21],"tags":[],"class_list":["post-284","post","type-post","status-publish","format-standard","hentry","category-utility"],"_links":{"self":[{"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/posts\/284"}],"collection":[{"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/comments?post=284"}],"version-history":[{"count":6,"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/posts\/284\/revisions"}],"predecessor-version":[{"id":1109,"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/posts\/284\/revisions\/1109"}],"wp:attachment":[{"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/media?parent=284"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/categories?post=284"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/tags?post=284"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}