一个能获取当前是星期几的java文件

以下是一个获取当前星期几的Java代码示例：

import java.util.Calendar;

public class GetDayOfWeekExample {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance();
        int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
        String dayOfWeekString = "";
        switch (dayOfWeek) {
            case Calendar.SUNDAY:
                dayOfWeekString = "星期日";
                break;
            case Calendar.MONDAY:
                dayOfWeekString = "星期一";
                break;
            case Calendar.TUESDAY:
                dayOfWeekString = "星期二";
                break;
            case Calendar.WEDNESDAY:
                dayOfWeekString = "星期三";
                break;
            case Calendar.THURSDAY:
                dayOfWeekString = "星期四";
                break;
            case Calendar.FRIDAY:
                dayOfWeekString = "星期五";
                break;
            case Calendar.SATURDAY:
                dayOfWeekString = "星期六";
                break;
        }
        System.out.println("今天是：" + dayOfWeekString);
    }
}

此代码使用Java Calendar类获取当前日期，并将日期转换为星期几字符串。在switch语句中，使用Calendar类中定义的星期几常量来匹配当前日期，并将其转换为相应的字符串。最后，打印输出当前星期几的字符串。