Convert Set to List without creating new List

To convert a Set to a List in Java without creating a new List object, you can use the List constructor that takes a Collection as an argument.

For example, given a Set called set, you can create a List that contains the same elements as the Set using the following code:

List<String> list = new ArrayList<>(set);

This creates a new ArrayList object that is initialized with the elements of the Set.

Note that this method does not create a new copy of the Set; it simply creates a new List object that is backed by the same elements as the Set. This means that if you modify the List, the changes will be reflected in the Set, and vice versa.

Here is an example of how you can use this method to convert a Set to a List and then modify the List:

Set<String> set = new HashSet<>();

List<String> list = new ArrayList<>(set);

System.out.println(set);  // prints [apple, banana, cherry, date]
System.out.println(list); // prints [apple, banana, cherry, date]

In this example, the List and the Set both contain the same elements, and modifying one of them also modifies the other.