Algorithms Coded in Java

Problem : Given an iterator of integers, can you give me back another iterator which iterates over the given iterator of integers such that the new iterator gives only even integers. There a couple of different ways to solve this problem. * The first option is to create a new list of integers and add only the even integers from the given iterator and then return an iterator by calling list.iterator(). This has a time complexity of O (n) but also has a space complexity of O (n) in the worst case, which is not desirable. Here is the code for it - public static Iterator<Integer> giveEvenIntegersIterator(Iterator<Integer> iterator) { List<Integer> evenIntegers = new ArrayList<Integer>(); if (iterator != null) { while(iterator.hasNext()) { Integer number = iterator.next(); if (number != null && number % 2 == 0) { evenIntegers.add(number); } } } retu...