20145109 《Java程序设计》第七周学习总结
Chapter 13 Time & Date
Date
System.currentTimeMillis()
return LONG. It's the number of ms from 1970.1.1 0:0:0.
getDateInstance()getTimeInstance()getDateTimeInstance()
return detailed date & time.
SimpleDateFormat: self-defined format:
DateFormat dateFormat = new SimpleDateFormat("EE-MM-dd-yyyy");System.out.println(dateFormat.format(new Date()));
Calendar
Calendar calendar = Calendar.gerInstance();out.println(calendar.get(Calendar.YEAR));calendar.set(2014, Calendar.MAY, 26); calendar.add(Calendar.HOUR, 3);calendar.roll(Calendar.DATE, 1); // only handle the date, month won't modify