How to Copy an Array in Kotlin - Step by Step Examples

How to Copy an Array in Kotlin ?

Answer

To copy an array in Kotlin, you can use the copyOf method or array.copyInto method to create a new array with the same elements.

✐ Examples

1 Copy Array Using copyOf Method

In this example,

We create an array named originalArray with integer values.
We use the copyOf method to create a new array named copiedArray with the same elements as originalArray.
The copyOf method returns a new array containing all elements of the original array.
Finally, we print both arrays to verify that the elements have been copied correctly.

Kotlin Program

fun main() {
    val originalArray = arrayOf(1, 2, 3, 4, 5)
    val copiedArray = originalArray.copyOf()
    println("Original Array: ${originalArray.joinToString()}")
    println("Copied Array: ${copiedArray.joinToString()}")
}

Output

Original Array: 1, 2, 3, 4, 5
Copied Array: 1, 2, 3, 4, 5

2 Copy Array Using copyInto Method

In this example,

We create an array named originalArray with string values.
We create a new empty array named destinationArray with the same size as originalArray.
We use the copyInto method to copy the elements of originalArray into destinationArray.
The copyInto method copies elements from the source array into the destination array starting at the specified index.
Finally, we print both arrays to verify that the elements have been copied correctly.

Kotlin Program

fun main() {
    val originalArray = arrayOf("a", "b", "c", "d", "e")
    val destinationArray = Array(originalArray.size) { "" }
    originalArray.copyInto(destinationArray)
    println("Original Array: ${originalArray.joinToString()}")
    println("Destination Array: ${destinationArray.joinToString()}")
}

Output

Original Array: a, b, c, d, e
Destination Array: a, b, c, d, e

Summary

In this tutorial, we learned How to Copy an Array in Kotlin language with well detailed examples.

◀ Previous Next ▶

Kotlin Tutorials

Kotlin How-Tos

How to Copy an Array in Kotlin - Step by Step Examples

How to Copy an Array in Kotlin ?

Answer

✐ Examples

1 Copy Array Using copyOf Method

Kotlin Program

Output

2 Copy Array Using copyInto Method

Kotlin Program

Output

Summary

More Kotlin Arrays Tutorials