How do I use TreeSet in Java?

How do I use TreeSet in Java?

A TreeSet in Java is a part of the Java Collections Framework. It implements the Set interface and uses a red-black tree to store elements in a sorted order. You can add elements, remove them, and iterate through the set.

Can you show me a simple example of how to create and use a TreeSet?

Sure! Here's a simple example:

import java.util.TreeSet;

public class Example {
    public static void main(String[] args) {
        TreeSet<String> treeSet = new TreeSet<>();
        treeSet.add("Apple");
        treeSet.add("Banana");
        treeSet.add("Cherry");

        System.out.println(treeSet);
    }
}

This will output: [Apple, Banana, Cherry] in sorted order.

What are the advantages of using TreeSet over HashSet?

The main advantages of TreeSet over HashSet are:

1. Sorted Order: TreeSet maintains elements in a sorted order.
2. Range Views: You can easily get subsets of the set.
3. Performance: TreeSet has O(log n) time complexity for basic operations like add, remove, and contains.

Are there any drawbacks to using TreeSet?

Yes, some drawbacks include:

1. Performance: TreeSet is generally slower than HashSet for basic operations due to its O(log n) complexity.
2. Memory Overhead: It uses more memory because of the underlying tree structure.