The Set add method is part of the Java Collection framework that allows us to store unique elements in a container. It adds the specified element to the set if it is not already present. If the element is already in the set, the method does not add it again and returns false.
For example, let's say we have a set of books and want to add a new book to it:
Set books = new HashSet<>();
books.add("The Great Gatsby"); // adds "The Great Gatsby" to the set
books.add("The Great Gatsby"); // doesn't add the book again, returns false
The Set add method can be found in the java.util package library.
Java Set.add - 30 examples found. These are the top rated real world Java examples of Set.add extracted from open source projects. You can rate examples to help us improve the quality of examples.