Slice

Say we have a list of elements, as follows:

val numbers = (1..10).toList()
// Prints [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

We can take only part of this list using slice():

println(numbers.slice((0..3)))
// Prints [1, 2, 3, 4], last index is included

We're using Kotlin ranges, which is a nice syntax. 

In Java, there's a subList() method, which is similar, but not inclusive:

println(numbers.subList(0, 3))
// Prints [1, 2, 3], last index is excluded