java - 给出周数和年份，找到一周的第一天和最后一天

Question

我有周数和年份，我想获取一周的第一天和最后一天的日期，这是我的代码，它给了我错误的结果，请告诉我我做错了什么。提前致谢。

SimpleDateFormat dt = new SimpleDateFormat("dd/mm/yyyy"); 
String start ="";
String end ="";
int week = 38;
int yeat = 2016;
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.WEEK_OF_YEAR, week);
calendar.set(Calendar.YEAR, year); 
// firt day of week
start = dt.format(calendar.getTime());
calendar.add(Calendar.DAY_OF_MONTH, 6);
//last day of week
end = dt.format(calendar.getTime());

Answer 1

• 更正 DateFormatter 语法，月份应大写

• 获取该周的周日和周六的日期 一年过去了。

    SimpleDateFormat dt = new SimpleDateFormat("dd/MM/yyyy"); 
       String start ="";
       String end ="";
       int week = 38;
       int year = 2016;
       Calendar calendar = Calendar.getInstance();
       calendar.set(Calendar.YEAR, year); 
       calendar.set(Calendar.DAY_OF_WEEK,Calendar.SUNDAY);
       calendar.set(Calendar.WEEK_OF_YEAR, week);
        start = dt.format(calendar.getTime());
       calendar.set(Calendar.DAY_OF_WEEK,Calendar.SATURDAY);
         end = dt.format(calendar.getTime());
       System.out.println(start+" |"+end);