How can I initialize an ArrayList with all zeroes in Java?

Question

It looks like arraylist is not doing its job for presizing:

// presizing 

ArrayList list = new ArrayList(60);
         


        

Answer 1

Java 8 implementation (List initialized with 60 zeroes):

List list = IntStream.of(new int[60])
                    .boxed()
                    .collect(Collectors.toList());

• new int[N] - creates an array filled with zeroes & length N
• boxed() - each element boxed to an Integer
• collect(Collectors.toList()) - collects elements of stream