1

In python I can do the following:

n = 8  
a = []  
a += [1]*n

How can I do the equivalent in java with ArrayLists (without using a for loop..)?

List<T> list = new ArrayList<T>();
list.add(1);
list.add(2);
list.add(3);
// Some construct that is equivalent to a += [1]*n
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2
  • For adding a list to the first one: List.addAll(Collection) Commented Nov 22, 2013 at 6:20
  • Sure, but that list does not exist yet. Collections.nCopies(8, 1) does what i want :) Commented Nov 22, 2013 at 7:08

1 Answer 1

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5 
final List<Integer> list = new ArrayList<Integer>();
list.add(1);
list.add(2);
list.add(3);
list.addAll(Collections.nCopies(8, 1));

see Collections.nCopies()

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