方便的方法來生成日期

Question

我想問什麼是最適合的方式來創建特定年份日期列表今年的日期。

我寫了下面的內容，它工作正常。 但是，我不確定這是最方便的方法。

 Calendar cal = new GregorianCalendar(2012, Calendar.JANUARY, 1); 
     Date startDate = cal.getTime(); 

     cal = new GregorianCalendar(2013, Calendar.JANUARY, 1); 
     Date endDate = cal.getTime(); 


     List<Date> dates = new ArrayList<Date>(); 
     Calendar calendar = new GregorianCalendar(); 
     calendar.setTime(startDate); 

     while (calendar.getTime().before(endDate)) { 
      Date date= calendar.getTime(); 
      dates.add(date); 
      calendar.add(Calendar.DATE, 1); 
     } 

Answer 1

你可以只簡化：

int startYear = 2012; 
int endYear = 2013; 

Calendar cal = new GregorianCalendar(startYear, Calendar.JANUARY, 1); 
ArrayList<Date> dates = new ArrayList<Date>(); 
while(cal.get(Calendar.YEAR) < endYear){ 
    dates.add(cal.getTime()); 
    cal.add(Calendar.DATE, 1); 
} 

Answer 2

類似how to get a list of dates between two dates in java

隨着Lamma一個可以很容易地構建日期範圍：

for (Date d: Dates.from(2014, 6, 29).to(2014, 7, 1).build()) { 
     System.out.println(d); 
    } 

，輸出是：

Date(2014,6,29) 
Date(2014,6,30) 
Date(2014,7,1)