回答編集履歴
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コード追加
answer
CHANGED
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@@ -1,5 +1,6 @@
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1
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日付差分だけならdifferenceDaysの中身がこんな感じでいかが？
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2
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3
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```java
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Calendar cal1 = Calendar.getInstance();
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cal1.setTime(date1);
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Calendar cal2 = Calendar.getInstance();
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@@ -12,4 +13,53 @@
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}
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cal1.setTimeInMillis(longtime1);
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cal1.add(Calendar.DATE, -1 * cal2.get(Calendar.DATE);
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-
return (int)cal1.get(Calendar.DATE);
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return (int)cal1.get(Calendar.DATE);
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```
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【追記】
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20
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年月日時分秒で差を求めるのだと下記のような感じになるかな？
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```java
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Calendar c1 = Calendar.getInstance();
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c1.setTime(date1);
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Calendar c2 = Calendar.getInstance();
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c2.setTime(date2);
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// millisecond
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c1.set(Calendar.MILLISECOND, 0);
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c2.set(Calendar.MILLISECOND, 0);
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// second
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int sec = c1.get(Calendar.SECOND) - c2.get(Calendar.SECOND);
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sec += (sec < 0) ? 60 : 0;
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c1.add(Calendar.SECOND, -1 * sec);
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// minute
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int min = c1.get(Calendar.MINUTE) - c2.get(Calendar.MINUTE);
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min += (min < 0) ? 60 : 0;
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c1.add(Calendar.MINUTE, -1 * min);
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// hour
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int hour = c1.get(Calendar.HOUR) - c2.get(Calendar.HOUR);
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hour += (hour < 0) ? 24 : 0;
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c1.add(Calendar.HOUR, -1 * hour);
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// day
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long longtime1 = c1.getTimeInMillis();
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c1.set(Calendar.DATE, 1);
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c1.add(Calendar.DATE, -1);
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int dayInLastMonth = c1.get(Calendar.DATE);
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c1.setTimeInMillis(longtime1);
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int day = c1.get(Calendar.DATE) - c2.get(Calendar.DATE);
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day += (day < 0) ? dayInLastMonth : 0;
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c1.add(Calendar.DATE, -1 * day);
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// month
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int month = c1.get(Calendar.MONTH) - c2.get(Calendar.MONTH);
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60
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month += (month < 0) ? 12 : 0;
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c1.add(Calendar.MONTH, -1 * month);
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// year
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int year = c1.get(Calendar.YEAR) - c2.get(Calendar.YEAR);
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65
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```
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