(If you want a refresher on arrays in Kotlin, kindly visit the first tutorial in this series.) In this section, we'll learn about the List, Set, and Map collections in Kotlin.
To really understand the collections API in Kotlin, you'll need to be familiar with these basic classes and interfaces in Java. You can't see the implementation source code in Kotlin because the collections are actually implemented by the standard Java Collections such as ArrayList, Maps, HashMap, Sets, HashSet, List, and so on. You should note that these interfaces are linked to their implementation at compile time. (We'll discuss interfaces in Kotlin in a future post.) Kotlin provides its collections API as a standard library built on top of the Java Collections API. We can retrieve, store, or organize the objects in a collection. Since a Java array has a range of, when an attempt is made to access an index outside this range, an ArrayIndexOutOfBoundsException is thrown.Collections are used to store groups of related objects in memory. an index that is less than 0, or equal to or greater than the length of the array. It occurs when a program attempts to access an invalid index in an array i.e. The ArrayIndexOutOfBoundsException is one of the most common errors in Java.
What Causes ArrayIndexOutOfBoundsException Since the ArrayIndexOutOfBoundsException is an unchecked exception, it does not need to be declared in the throws clause of a method or constructor. The index is either negative or greater than or equal to the size of the array. The ArrayIndexOutOfBoundsException is a runtime exception in Java that occurs when an array is accessed with an illegal index.
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