Java/日付 - 変更履歴

Admin: /* 年月日曜日取得 */

2019-08-01T05:47:16Z

‎年月日曜日取得

2019-02-01T08:21:10Z

‎SimpleDateFormat

2019-02-01T08:20:49Z

‎SimpleDateFormat

2019-02-01T08:09:55Z

‎SimpleDateFormat

2019-01-29T01:09:17Z

‎日付比較

2019-01-29T01:08:33Z

‎日付比較

2019-01-29T01:06:29Z

‎msからhh:mm:ii.mmmへ

2019-01-28T08:17:43Z

‎unixtime

2019-01-24T09:35:49Z

‎SimpleDateFormat

2019-01-24T09:32:44Z

‎SimpleDateFormat

@@ 行17: / 行17: @@
   int day = cal.get(Calendar.DATE);
   int week = cal.get(Calendar.DAY_OF_WEEK);
-  int h = cal.get(now.HOUR_OF_DAY);//時を取得
+  int h = cal.get(Calendar.HOUR_OF_DAY);//時を取得
-  int m = cal.get(now.MINUTE);     //分を取得
+  int m = cal.get(Calendar.MINUTE);     //分を取得
-  int s = cal.get(now.SECOND);      //秒を取得
+  int s = cal.get(Calendar.SECOND);      //秒を取得
 ==hh:mm:ssから秒数取得==

@@ 行72: / 行72: @@
   System.out.println(sdf.format(date));
-  SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ"); // 2001-07-04T12:08:56.235-07:00
+  SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
   String ymd = sdf.format(date);
   ymd = ymd.substring(0, 26) + ":" + ymd.substring(26, 28); // 2019-01-24T18:33:07.785+09:00

←前の版		2019年2月1日 (金) 08:20時点における版
行72:		行72:
	System.out.println(sdf.format(date));		System.out.println(sdf.format(date));

		+	SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ"); // 2001-07-04T12:08:56.235-07:00
		+	String ymd = sdf.format(date);
		+	ymd = ymd.substring(0, 26) + ":" + ymd.substring(26, 28); // 2019-01-24T18:33:07.785+09:00

	<pre>		<pre>

@@ 行86: / 行86: @@
 </pre>
-https://docs.oracle.com/javase/jp/6/api/java/text/SimpleDateFormat.html
+参考：https://docs.oracle.com/javase/jp/6/api/java/text/SimpleDateFormat.html
 ==unixtime==

@@ 行1: / 行1: @@
 ==日付比較==
   SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm");
-  Date ddate = sdf.parse("2012-10-10 10:10");
+  Date date = sdf.parse("2012-10-10 10:10");
   Date today = new Date();
-  if (today.compareTo(ddate) == 1) {
+  if (today.compareTo(date) == 1) {
-    // ddateが昔
+    // dateが昔
-  } else if (today.compareTo(ddate) == 0) {
+  } else if (today.compareTo(date) == 0) {
-    // ddateが今日と同じ
+    // dateが今日と同じ
-  } else if (today.compareTo(ddate) == -1) {
+  } else if (today.compareTo(date) == -1) {
-    // ddateが未来
+    // dateが未来
+  }

@@ 行92: / 行92: @@
   String unixtimeStr = String.valueOf(unixtime);
-==msからhh:mm:ii.mmmへ==
+==msからHH:MM:SS.mmmへ==
   public static String getHHMMSSmmByMs(int ms) {
          long hour = (ms / (1000 * 60 * 60)) % 24;
@@ 行98: / 行98: @@
          long second = (ms / 1000)  % 60;
          long millisSec = ms % 1000;
-         return String.format("%02d:%02d:%02d:%03d", hour, minute, second, millisSec);
+         return String.format("%02d:%02d:%02d.%03d", hour, minute, second, millisSec);
+  }
 参考：
 https://qiita.com/rild/items/cef1229a74ba2a9298b3

←前の版		2019年1月28日 (月) 08:17時点における版
行91:		行91:
	int unixtime = System.currentTimeMillis() / 1000L;		int unixtime = System.currentTimeMillis() / 1000L;
	String unixtimeStr = String.valueOf(unixtime);		String unixtimeStr = String.valueOf(unixtime);
		+
		+	==msからhh:mm:ii.mmmへ==
		+	public static String getHHMMSSmmByMs(int ms) {
		+	long hour = (ms / (1000 * 60 * 60)) % 24;
		+	long minute = (ms / (1000 * 60)) % 60;
		+	long second = (ms / 1000) % 60;
		+	long millisSec = ms % 1000;
		+	return String.format("%02d:%02d:%02d:%03d", hour, minute, second, millisSec);
		+	}
		+	参考：
		+	https://qiita.com/rild/items/cef1229a74ba2a9298b3

@@ 行68: / 行68: @@
 例
   Date date = new Date();
-  SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
+  SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ"); // 2019-01-24T18:33:07.785+0900
   System.out.println(sdf.format(date));

@@ 行67: / 行67: @@
 ==SimpleDateFormat==
 例
 <pre>
 日付/時刻パターン	結果