Java求某一天是星期几

import java.util.Calendar;
import java.util.GregorianCalendar;
//某一天是周几
public class F {
    public static void main(String[] args) {
        //2018.03.24
        Calendar c = new GregorianCalendar(2018,3-1, 24);//因为一月为0
        int m= c.get(Calendar.DAY_OF_WEEK)-1;//每周第一天是周日
        System.out.println("测试结果：" + m);
    }
}