Of course, we’d love something better than this! Let’s see what Kotlin has to offer. Then, we populated that list one item at a time using the add() method. Here, we’ve created an empty ArrayList of integers.

Naturally, we can translate the Java solution almost directly: val list = ArrayList() Solutionsįortunately, Kotlin has improved quite a bit on Java’s verbosity, so I promise there’s a better way to create an ArrayList. There are some nasty workarounds, but I was hoping Kotlin would improve on the Java conventions a bit. I would prefer to be able to do something like the following: ArrayList list = new ArrayList(7, -4, 3)Īnd, for larger data sets, it would be nice to be able to spread the values over multiple lines: ArrayList list = new ArrayList( There’s just too much redundant information. In fact, I don’t even think it reads well.

For reference, here’s what I don’t want to do: ArrayList list = new ArrayList()Īs you can probably imagine, this solution does not scale well. Unfortunately, there’s no clean way of initializing an ArrayList in Java, so I wondered if Kotlin had improved on that issue.

As someone who came from Java, I often find myself using the ArrayList class to store data.

Kotlin new list