Convert Set to List without creating new List

Question

I am using this code to convert a Set to a List:

Map> mainMap = new HashMap<>();

for (int i         


        

Answer 1

We can use following one liner in Java 8:

List list = set.stream().collect(Collectors.toList());

Here is one small example:

public static void main(String[] args) {
        Set set = new TreeSet<>();
        set.add("A");
        set.add("B");
        set.add("C");
        List list = set.stream().collect(Collectors.toList());
}