Java collections convert a string to a list of characters

Question

I would like to convert the string containing abc to a list of characters and a hashset of characters. How can I do that in Java ?

List

        

Answer 1

The most straightforward way is to use a for loop to add elements to a new List:

String abc = "abc";
List charList = new ArrayList();

for (char c : abc.toCharArray()) {
  charList.add(c);
}

Similarly, for a Set:

String abc = "abc";
Set charSet = new HashSet();

for (char c : abc.toCharArray()) {
  charSet.add(c);
}