Nov 18, 2025 · In Java, the Set interface is a part of the Java Collection Framework, located in the java.util package. It represents a collection of unique elements, meaning it does not allow duplicate …

Jan 11, 2010 · Again, this is not time efficient since you are constructing an array, converting to a list and using that list to create a set. When initializing static final sets I usually write it like this: public static …

Sep 5, 2024 · The Java’s Collections utility class provides the method named singleton to create a Set with a single element. The Set instance created with the singleton method is immutable, meaning …

The Set interface is part of the Java Collections Framework and is used to store a collection of unique elements. Unlike a List, a Set does not allow duplicates, and it does not preserve the order of …

More formally, sets contain no pair of elements e1 and e2 such that e1.equals(e2), and at most one null element. As implied by its name, this interface models the mathematical set abstraction.

Nov 12, 2025 · In Java, a Set is an interface in the Java Collections Framework that extends the Collection interface. It represents an unordered collection of unique elements. This means that a Set …

Jul 18, 2024 · Java code examples to create a Set that is initialized with some elements in just a single line.

May 14, 2025 · Once set interface functionality is included in the program, we can create a set in Java using any of the set classes (classes that implement set interface) as shown below. We can then …

The interface Set of the java.util package represents the set in Java. The classes HashSet and LinkedHashSet implements this interface.

We can easily create a set if we’re in Java 8. If we’re in Java 9, we can use Set.of() (same with List.of()). How do we create a set in Java? With lists, this is an easy one-liner: