如何以编程方式获取第一天的第一天日期,如果今天是星期三11/9/2013以规则方式获取2013年9月9日星期一的日期是否有任何方法使用当前日期获得一周的第一天? mDay今天给我一天号码,我想用这个号码来获得星期一的星期几
public static int mYear;
public static int mMonth;
public static int mDay;
Calendar mCalendar = Calendar.getInstance();
mYear = mCalendar.get(Calendar.YEAR);
mMonth = mCalendar.get(Calendar.MONTH) + 1;
mDay = mCalendar.get(Calendar.DAY_OF_MONTH);
how to use this function below
private static Date firstDayOfWeek(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.set(Calendar.DAY_OF_WEEK, 1);
return calendar.getTime();
wht parameter i write when call function
firstDayOfWeek();?????
}
答案 0 :(得分:0)
尝试使用此代码可以解决您的问题
public class dateTest {
public static void main (String args []) throws ParseException{
DateFormat df=new SimpleDateFormat("dd/MM/yy");
Date birthDay=df.parse("29/08/02");
Calendar cal = Calendar.getInstance();
cal.set(Calendar.HOUR_OF_DAY, 0); // ! clear would not reset the hour of day !
cal.clear(Calendar.MINUTE);
cal.clear(Calendar.SECOND);
cal.clear(Calendar.MILLISECOND);
cal.setTime(birthDay);
cal.set(Calendar.DAY_OF_WEEK, cal.getFirstDayOfWeek()+1);
System.out.println("Date: " + cal.get(Calendar.DATE)+ "/" +cal.get(Calendar.MONTH)+"/"+cal.get(Calendar.YEAR));
}
}
获取工作日
Calendar cal=Calendar.getInstance();
int dayNum=cal.get(Calendar.DAY_OF_WEEK);
String day=new String();
switch (dayNum){
case 1:
day="Sunday";
break;
case 2:
day="Monday";
break;
case 3:
day="Tuesday";
break;
case 4:
day="Wednesday";
break;
case 5:
day="Thursday";
break;
case 6:
day="Friday";
break;
case 7:
day="Saturday";
break;
}
System.out.println("Day is: "+day);
答案 1 :(得分:0)
您只需使用以下代码: Calendar Class的add(int field,int amount)方法适合您的需要。
int mYear = 0;
int mMonth;
int mDay;
int dayOFWeek = 0;
String mondayDate="";
Calendar mCalendar = Calendar.getInstance();
mCalendar.setFirstDayOfWeek(Calendar.MONDAY);
dayOFWeek = mCalendar.get(Calendar.DAY_OF_WEEK);
mCalendar.add(Calendar.DATE, -dayOFWeek);
mYear = mCalendar.get(Calendar.YEAR);
mMonth = mCalendar.get(Calendar.MONTH) + 1;
mDay = mCalendar.get(Calendar.DAY_OF_MONTH);