What are some common operations on sets and lists in Java?

What are some common operations I can perform on sets in Java?

In Java, common operations on sets include adding elements, removing elements, checking for membership, and performing union, intersection, and difference operations.

Can you show me an example of how to add and remove elements from a set?

Sure! You can use the add() method to add elements and the remove() method to remove elements. For example:

Set<String> mySet = new HashSet<>();
mySet.add("Apple");
mySet.add("Banana");
mySet.remove("Apple");

What about lists? What operations can I perform on them?

For lists, you can add elements, remove elements, access elements by index, and sort the list. For example:

List<String> myList = new ArrayList<>();
myList.add("Apple");
myList.add("Banana");
String firstElement = myList.get(0);
myList.remove("Banana");

How do I convert a list to a set in Java?

You can convert a list to a set using the constructor of the HashSet class. For example:

List<String> myList = Arrays.asList("Apple", "Banana", "Apple");
Set<String> mySet = new HashSet<>(myList);