How do I use immutable collections in Java?

What are immutable collections in Java?

Immutable collections in Java are collections that cannot be modified after they are created. This means you cannot add, remove, or change elements.

Why should I use immutable collections?

Using immutable collections can lead to safer code, as they prevent accidental changes. They are also thread-safe, making them ideal for concurrent programming.

Can you give me an example of creating an immutable list?

Sure! You can create an immutable list using List.of() method in Java 9 and later. For example: List<String> list = List.of("A", "B", "C");.

What about immutable maps?

You can create an immutable map using Map.of() method. For example: Map<String, Integer> map = Map.of("One", 1, "Two", 2);.