JAVA获取指定日期是星期几

/**
 * 获取指定日期是星期几<br>
 *
 * @param date
 * @return 指定日期是星期几
 */
public static String getWeekOfDate(Date date) {
    String[] weekDays = { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);
    int w = cal.get(Calendar.DAY_OF_WEEK) - 1;
    if (w < 0)
        w = 0;
    return weekDays[w];
}