{"id":242,"date":"2014-08-01T12:08:26","date_gmt":"2014-08-01T03:08:26","guid":{"rendered":"http:\/\/kei0310.info\/?p=242"},"modified":"2014-08-01T12:08:26","modified_gmt":"2014-08-01T03:08:26","slug":"java-%e6%97%a5%e4%bb%98%e3%81%ae%e8%a8%88%e7%ae%97%e6%96%b9%e6%b3%95%ef%bc%88dateformat%e3%80%81date%e3%80%81calendar%ef%bc%89","status":"publish","type":"post","link":"http:\/\/kei0310.info\/?p=242","title":{"rendered":"[Java] \u65e5\u4ed8\u306e\u8a08\u7b97\u65b9\u6cd5\uff08DateFormat\u3001Date\u3001Calendar\uff09"},"content":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001kei0310\u3067\u3059\u3002<\/p>\n<p>Java\u3067\u65e5\u4ed8\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u3001\u4efb\u610f\u306e\u65e5\u4ed8\u3092\u3064\u304f\u308b\u305f\u3081\u306b\u306f\u3001DateFormat\u3092\u5229\u7528\u3057\u307e\u3059\u3002<br \/>\nSimpleDateFormat\u30af\u30e9\u30b9\u306f\u3068\u3066\u3082\u91cd\u3044\u30af\u30e9\u30b9\u306a\u306e\u3067\u3001\u3084\u305f\u3089\u3081\u3063\u305f\u3089new\u3059\u308b\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u843d\u3061\u307e\u3059\u304c\u3001\u3053\u306e\u8a71\u3092\u3059\u308b\u3068\u8a18\u4e8b\u306e\u7bc4\u7587\u3092\u8d85\u3048\u308b\u306e\u3067\u5272\u611b\u3057\u307e\u3059\u3002<br \/>\n\u203b\u7279\u306bWeb\u30a2\u30d7\u30ea\u306e\u3088\u3046\u306a\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067SimpleDateFormat\u3092\u53d6\u308a\u6271\u3046\u3068\u304d\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<p>DateFormat\u306e\u53d6\u308a\u6271\u3044\u81ea\u4f53\u306f\u7c21\u5358\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<h6>\n<pre class=\"brush: java; title: ; notranslate\" title=\"\">\r\n\/\/ DateFormat\u4f5c\u6210\r\nDateFormat df = new SimpleDateFormat(&quot;yyyy-MM-dd&quot;);\r\n\/\/ \u65e5\u4ed8\u6587\u5b57\u5217\u3092Date\u578b\u306b\u5909\u63db\r\nDate dt = df.parse(&quot;2014-08-01&quot;);\r\n<\/pre>\n<\/h6>\n<p>\u3042\u3068\u306f\u3001Calendar\u30af\u30e9\u30b9\u3092\u4ecb\u3057\u3066\u65e5\u4ed8\u306e\u8a08\u7b97\u3092\u884c\u3044\u307e\u3059\u3002<br \/>\n\u4ee5\u4e0b\u306f\u3001\u305d\u306e\u307e\u307e\u30b3\u30d4\u30da\u3057\u3066\u4f7f\u3048\u308b\u30b5\u30f3\u30d7\u30eb\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u25cf\u65e5\u4ed8\u306e\u8a08\u7b97\u30b5\u30f3\u30d7\u30eb<\/p>\n<h6>\n<pre class=\"brush: java; title: ; notranslate\" title=\"\">\r\npackage test.date;\r\n\r\nimport java.text.DateFormat;\r\nimport java.text.ParseException;\r\nimport java.text.SimpleDateFormat;\r\nimport java.util.Calendar;\r\nimport java.util.Date;\r\n\r\npublic class TestDateCalc {\r\n\r\n\tpublic static void main(String[] args) throws ParseException{\r\n\r\n\t\t\/\/ DateFormat\r\n\t\tDateFormat df = new SimpleDateFormat(&quot;yyyy-MM-dd&quot;);\r\n\r\n\t\t\/\/ 2014\/08\/01\u3067Date\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u4f5c\u6210\r\n\t\tDate dt = df.parse(&quot;2014-08-01&quot;);\r\n\r\n\t\t\/\/ \u30ab\u30ec\u30f3\u30c0\u30fc\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53d6\u5f97\r\n\t\tCalendar cal = Calendar.getInstance();\r\n\r\n\t\t\/\/ \u73fe\u5728\u6642\u523b\u3092\u8a2d\u5b9a\r\n\t\tcal.setTime(dt);\r\n\r\n\t\t\/\/ 150\u65e5\u3092\u52a0\u7b97\r\n\t\tcal.add(Calendar.DATE, 150);\r\n\t\t\/\/ \u7d50\u679c\u3092\u8868\u793a\r\n\t\tSystem.out.println(df.format(cal.getTime()));\r\n\r\n\t\t\/\/ \uff12\u30ab\u6708\u3092\u52a0\u7b97\r\n\t\tcal.add(Calendar.MONTH, 2);\r\n\t\t\/\/ \u7d50\u679c\u3092\u8868\u793a\r\n\t\tSystem.out.println(df.format(cal.getTime()));\r\n\r\n\t\t\/\/ \uff11\u5e74\u3092\u6e1b\u7b97\r\n\t\tcal.add(Calendar.YEAR, -1);\r\n\t\t\/\/ \u7d50\u679c\u3092\u8868\u793a\r\n\t\tSystem.out.println(df.format(cal.getTime()));\r\n\r\n\t}\r\n}\r\n<\/pre>\n<\/h6>\n<p>\u25cf\u7d50\u679c<\/p>\n<h6>\n<pre class=\"brush: java; title: ; notranslate\" title=\"\">\r\n2014-12-29\r\n2015-02-28\r\n2014-02-28\r\n<\/pre>\n<\/h6>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001kei0310\u3067\u3059\u3002 Java\u3067\u65e5\u4ed8\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002 \u307e\u305a\u3001\u4efb\u610f\u306e\u65e5\u4ed8\u3092\u3064\u304f\u308b\u305f\u3081\u306b\u306f\u3001DateFormat\u3092\u5229\u7528\u3057\u307e\u3059\u3002 SimpleDateFormat\u30af\u30e9\u30b9\u306f\u3068\u3066\u3082\u91cd\u3044\u30af\u30e9\u30b9\u306a\u306e\u3067\u3001\u3084 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4,28],"tags":[87,86,84,183,85,40,83,82],"_links":{"self":[{"href":"http:\/\/kei0310.info\/index.php?rest_route=\/wp\/v2\/posts\/242"}],"collection":[{"href":"http:\/\/kei0310.info\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/kei0310.info\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/kei0310.info\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/kei0310.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=242"}],"version-history":[{"count":1,"href":"http:\/\/kei0310.info\/index.php?rest_route=\/wp\/v2\/posts\/242\/revisions"}],"predecessor-version":[{"id":243,"href":"http:\/\/kei0310.info\/index.php?rest_route=\/wp\/v2\/posts\/242\/revisions\/243"}],"wp:attachment":[{"href":"http:\/\/kei0310.info\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=242"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/kei0310.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=242"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/kei0310.info\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=242"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}