merge multiple lists code example

Example 1: combine multiple list array

List<Integer> joinedList = new ArrayList<>();
Stream.of(list1, list2, list3, list4).forEach(joinedList::addAll);

Example 2: merge two lists

# Makes list1 longer by appending the elements of list2 at the end.
list1.extend(list2)

Example 3: how to combine two lists in python

l1 = ["a", "b" , "c"]
l2 = [1, 2, 3]
l1 + l2
>>> ['a', 'b', 'c', 1, 2, 3]