How to define an arraylist of nested class objects in Java?

Question

I have the following class definition:

public class kdtrees{
 ...
  public static class DataPoints{
  ... 
  }

}

I can create objects of the inner class using:

kdtrees.DataPoint point = new kdtrees.DataPoint();

I want to make point, an ArrayList so that I can instantiate multiple objects of the inner class. How can I do it?

Its the exact same with a nested class as it is with any other. ArrayList<DataPoints> list; or ArrayList<kdtrees.DataPoints> list; — Name
– Name, Commented Dec 29, 2012 at 21:45

asgoth · Accepted Answer · 2012-12-29 21:46:51Z

4

List<kdtrees.DataPoint> list = new ArrayList<kdtrees.DataPoint>();
list.add(new kdtrees.DataPoint());

answered Dec 29, 2012 at 21:46

asgoth

35.8k12 gold badges91 silver badges98 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

can you please tell me, how to get object of inner class while retrieving the list

Marcel Stör · Accepted Answer · 2012-12-29 21:46:36Z

1

List<kdtrees.DataPoint> list = new ArrayList<kdtrees.DataPoint>();
points.add(new kdtrees.DataPoint());

Don't understand your problem, sorry.

answered Dec 29, 2012 at 21:46

Marcel Stör

23.8k20 gold badges107 silver badges217 bronze badges