如何获得一周的日期（我知道周数）？ [英] How to get dates of a week (I know week number)?

问题描述

我知道一年中的周数，一周从星期日开始，然后是星期一，星期二......星期六。

I know the week number of the year, a week is start from Sunday, then Monday, Tuesday...,Saturday.

因为我知道周数，使用Java代码获取特定周的日期的有效方法是什么？

Since I know the week number, what's the efficient way to get the dates of the specific week by using Java code??

推荐答案

如果你不想要外部库，只需使用日历。

If you don't want external library, just use calendar.

SimpleDateFormat sdf = new SimpleDateFormat("MM dd yyyy");
Calendar cal = Calendar.getInstance();
cal.set(Calendar.WEEK_OF_YEAR, 23);        
cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
System.out.println(sdf.format(cal.getTime()));    

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