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How to create an array in Kotlin like in Java by just providing a size?
Kotlin is a cross platform statistically typed language based upon JVM. Kotlin is designed in such a way that it is interoperate fully with Java and JVM. In Java, we can simply create an array by providing a size.
Example – Array of Specific Size in Java
The following example demonstrates how to create an array of a specific size in Java.
public class MyClass {
public static void main(String args[]) {
int a[]=new int[5];
for(int i=0;i<=5;i++){
System.out.println(a[i]);
}
}
}Output
As we have created an empty array, it will have the default values of 0’s in it.
0 0 0 0 0 Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 5 at MyClass.main(MyClass.java:5)
Example – Array of Specific Size in Kotlin
In this example, we will see how we can create an array of specific size in Kotlin.
fun main(args: Array<String>) {
// declaring null array of size 5
// equivalent in Java: new Integer[size]
val arr = arrayOfNulls<Int>(5)
print("Array of size 5 containing only null values:
")
println(arr.contentToString())
val strings = Array(5) { "n = $it" }
print("
Array of size 5 containing predefined values:
")
println(strings.contentToString())
val arrZeros = Array(5) { 0 }
print("
Array of size 5 containing predefined values:
")
println(arrZeros.contentToString())
}Output
It will generate the following output −
Array of size 5 containing only null values: [null, null, null, null, null] Array of size 5 containing predefined values: [n = 0, n = 1, n = 2, n = 3, n = 4] Array of size 5 containing predefined values: [0, 0, 0, 0, 0]
Updated on: 16-Mar-2022
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