Calendar關於日期的使用?

文章目錄

• 去年的今天是星期幾?

去年的今天是星期幾?

public final class WeekFactory {</p><p> private WeekFactory() {<br /> }</p><p> public static String getWeek(int no) {<br /> Map<Integer, String> weeks = new HashMap<Integer, String>();<br /> weeks.put(1, "星期日");<br /> weeks.put(2, "星期一");<br /> weeks.put(3, "星期二");<br /> weeks.put(4, "星期三");<br /> weeks.put(5, "星期四");<br /> weeks.put(6, "星期五");<br /> weeks.put(7, "星期六");</p><p> return weeks.get(no);<br /> }<br />}</p><p>public static void main(String[] args) {<br /> Calendar cal = Calendar.getInstance();<br /> cal.add(Calendar.YEAR, -1);<br /> //每周的第一天是星期日<br /> int day = cal.get(Calendar.DAY_OF_WEEK);<br /> System.out.println(WeekFactory.getWeek(day));<br />}<br />

 

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