Java SimpleDateFormat.format抛出java.lang.IllegalArgumentException

Question

我需要从Date对象获取“Day of day”。我试图将Date对象中的Day编号解析为new SimpleDateFormat("u").format(date)。

根据SimpleDateFormat u : Day number of week (1 = Monday, ..., 7 = Sunday)

的Oracle文档

这是例外情况

Answer 1

试试这个以获取约会的日期......

Calendar c = Calendar.getInstance();
c.setTime(yourDate);//Replace your date with the date which u have
int dayOfWeek = c.get(Calendar.DAY_OF_WEEK);

Answer 2

使用此

Calendar c = Calendar.getInstance(); //create an instance of Calendar class
int Day = c.get(Calendar.DAY_OF_WEEK); //get current day of the week from the same instance