This post shows usage of mutableSetOf() method in Kotlin with an example. With mutableSetOf(), we can create mutable sets in Kotlin.
Kotlin mutableSetOf() Example
The following example creates a mutable set and presents several of its methods.
package net.sourcecodeexamples.kotlin
fun main(args: Array < String > ) {
val nums = mutableSetOf(3, 4, 5)
nums.add(6)
nums.add(7)
nums.addAll(setOf(8, 9, 10))
println(nums)
nums.remove(10)
println(nums)
nums.retainAll(setOf(12, 14, 16, 18))
println(nums)
nums.clear()
if (nums.isEmpty()) println("The set is empty")
else println("The set is not epty")
}
Output:
[3, 4, 5, 6, 7, 8, 9, 10]
[3, 4, 5, 6, 7, 8, 9]
[]
The set is empty
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