Other JVM Collections

If you are using Kotlin/JVM — for example, if you are using Kotlin for ordinary Android app development — you are welcome to use other JVM collection types, such as LinkedList. On the whole, you should stick with Kotlin collection types where possible, as the Kotlin types are more “natural” for use in Kotlin. But sometimes you will find a Java class that fits your scenario better, such as using a LinkedHashMap to implement an LRU-style cache.

Coming up in a later chapter, we will see how to create instances of arbitrary classes — such as LinkedList — and how to work with them.