vice versa. val sourceList = mutableListOf(1, 2, 3) val copySet = sourceList.toMutableSet() copySet.add(3) copySet.add(4) println(copySet) Alternatively, you can create new references to the same

void listToSet() { var sourceList = List.of(1, 2, 3, 1); var copySet = Set.copyOf(sourceList); System.out.println(copySet); } In Kotlin, use the function toSet(): fun main() { //sampleStart //sampleStart // Kotlin val sourceList = listOf(1, 2, 3, 1) val copySet = sourceList.toSet() 625 println(copySet) //sampleEnd } Group elements In Java, you can group elements with the Collectors val sourceList = mutableListOf(1, 2, 3) val copySet = sourceList.toMutableSet() copySet.add(3) copySet.add(4) println(copySet) //sampleEnd } Alternatively, you can create new references