是否可能在java中的一个方法中返回两个ArrayList值？ [英] Is it Possible to Return Two ArrayList values in One method in java?

问题描述

有任何方法可以从一个方法返回两个值....

Is there any way to return two values from one method....

示例：

public Class Sample
{
  public List<Date> returnTwoArrayList()
   {
      List<Date> startDate=new ArrayList<Date>();

      List<Date> endDate=new ArrayList<Date>();

     //So I want to Return Two values startDate and endDate ...It is Possible????
   }
}

Edit:1

我把这个方法调用到我的服务类中，在这里存储 StartDate 和 endDate 列

i'm calling this method into My Service class and in that Storing StartDate and endDate into Database here these are Two different Columns

**StartDate      endDate**
2012-12-01     2012-12-05
2012-12-01     2012-12-15
2012-12-02     2012-12-10
2012-12-20     2012-12-25
2012-12-25     2012-12-31

推荐答案

您无法通过一个方法调用分隔结构，但您可以返回组合。例如，返回列表的列表将是一种可能的解决方案：

You cannot return separate structures via one method call, but you can return a composite of them. For example, returning a list of your lists would be a possible solution:

   public List<List<Date>> returnTwoArrayList()
   {
      List<Date> startDate=new ArrayList<Date>();
      List<Date> endDate=new ArrayList<Date>();

      List<List<Date>> result = new ArrayList<List<Date>>();
      result.add(startDate);
      result.add(endDate);

      return result;
   }

您可以使用 get（）方法来检索这些列表。
假设您进行了 List< List< Date>> twoLists.get（0）可以通过调用 startDate / code>和类似 endDate 与 twoLists.get（1）

You can use get() method to retrieve these lists later on. Suppose you have made a call like List<List<Date>> twoLists = returnTwoArrayList(); then you can get startDate by calling twoLists.get(0) and similarly endDate with twoLists.get(1)

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