Kotlin List.component4() – Examples

Kotlin List.component4()

The Kotlin List.component4() function returns fourth element from the list.

Syntax

List.component4()

Example 1

In this example,

1. Take a list with four or more elements.
2. Call component4() function on the list. The function should return the fourth element.

Program

fun main(args: Array<String>) {
    val list1 = listOf("a", "b", "c", "d", "e")
    val result = list1.component4()
    print(result)
}

Output

d

Example 2

In this example,

1. Take a list with less than four elements.
2. Call component4() function on the list. As there no at least four elements in the list, the function should throw java.lang.ArrayIndexOutOfBoundsException.

Program

fun main(args: Array<String>) {
    val list1 = listOf("a", "b", "c")
    val result = list1.component4()
    print(result)
}

Output

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 3
	at java.base/java.util.Arrays$ArrayList.get(Arrays.java:4350)
	at KotlinExampleKt.main(KotlinExample.kt:3)