List<Date> 拆分多个List<Date>,按照周六周日

Question

如2018-04-12到2018-04-24的list
按照周六周日拆分如下：
2018-04-12到2018-04-13
2018-04-14到2018-04-15
2018-04-16到2018-04-20
2018-04-21到2018-04-22
2018-04-23到2018-04-24

Answer 1

 public static void main(String[] args) {
        Date d1 = new Date(2018-1900,03,12);
        Date d2 = new Date(2018-1900,03,13);
        Date d3 = new Date(2018-1900,03,14);
        Date d4 = new Date(2018-1900,03,15);
        Date d5 = new Date(2018-1900,03,16);
        Date d6 = new Date(2018-1900,03,17);
        Date d7 = new Date(2018-1900,03,18);
        Date d8 = new Date(2018-1900,03,19);
        Date d9 = new Date(2018-1900,03,20);
        Date d10 = new Date(2018-1900,03,21);
        Date d11 = new Date(2018-1900,03,22);
        List<Date> l1 = new ArrayList<Date>();
        l1.add(d1);
        l1.add(d2);
        l1.add(d3);
        l1.add(d4);
        l1.add(d5);
        l1.add(d6);
        l1.add(d7);
        l1.add(d8);
        l1.add(d9);
        l1.add(d10);
        l1.add(d11);
        int j = 0;
        for(int i = 0;l1.size()>i;i++){
            Date currentDate=l1.get(i);
            Calendar cal = Calendar.getInstance();
            cal.setTime(currentDate);
            if(cal.get(Calendar.DAY_OF_WEEK)==Calendar.SATURDAY){
                    List<Date> subList = l1.subList(j, i); 
                    j=i;
                    System.out.println(j); 
                    System.out.println(subList); 
             }else if(cal.get(Calendar.DAY_OF_WEEK)==Calendar.SUNDAY){
                 int k = i+1;
                 List<Date> subList = l1.subList(j, k);    
                    System.out.println(subList);
                    j=k;
                    System.out.println(j);

             }
        }

    }

这个是后台打印结果