Java/日付

日付比較

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

年月日曜日取得

Calendar cal = Calendar.getInstance();
int year = cal.get(Calendar.YEAR);
int month = cal.get(Calendar.MONTH) + 1;
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 m = cal.get(now.MINUTE);     //分を取得
int s = cal.get(now.SECOND);      //秒を取得