how to convert property of class to array with retrolambda

Question

Im using retrolambda in Android.

I have one class like below code(Java).

public class ContactListViewModel { public String DisplayName; public String PhoneNumber; }

And there is a method that returns value back like ArrayList<ContactListViewModel>

I want to only select PhoneNumber property and i want to it is convert to array.

android :

ArrayList<ContactListViewModel> contactList = contactListService.GetContactList(getContext().getContentResolver());
    ArrayList<List> phoneList = contactList.stream().Select(l->l.PhoneNumber).ToArray(); 

Above how can i do?

like c#

    class Program
{
    static void Main(string[] args)
    {
        List<ContactListViewModel> p = new List<ContactListViewModel>();
        var phoneNumberArr = p.Select(l => l.PhoneNumber).ToArray();
    }
}
public class ContactListViewModel
{
    public string DisplayName { get; set; }
    public string PhoneNumber { get; set; }
}

Thank you.

Answer 1

i found

List<String> phoneList =  contactList.stream().map(arr->arr.PhoneNumber).collect(Collectors.toList());