Question

java中怎样获取本月第一个星期一

Answer 1

import java.util.Calendar;
import java.util.Date;

public class C {

public static void main(String[] args) {
Calendar cal = Calendar.getInstance();

cal.set(Calendar.DAY_OF_MONTH, 1);

int i = 1;
while(cal.get(Calendar.DAY_OF_WEEK) != Calendar.MONDAY){
cal.set(Calendar.DAY_OF_MONTH, i++);
}

Date firstMonday = cal.getTime();
System.out.println(firstMonday.toString());
}

}

追问

可不可以 不是输出这个了：？ Mon Jul 04 13:01:24 CST 2011
输出的是这样：2011-7-04

追答

Easy!

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class C {

public static void main(String[] args) {
Calendar cal = Calendar.getInstance();

cal.set(Calendar.DAY_OF_MONTH, 1);

int i = 1;
while(cal.get(Calendar.DAY_OF_WEEK) != Calendar.MONDAY){
cal.set(Calendar.DAY_OF_MONTH, i++);
}

Date firstMonday = cal.getTime();
String dtStr = new SimpleDateFormat("yyyy-MM-dd").format(firstMonday);
System.out.println(dtStr);
}

}

Answer 2

学习！

Answer 3

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