javalistconcurrency

Is there a concurrent List in Java's JDK?

How can I create a concurrent List instance, where I can access elements by index? Does the JDK have any classes or factory methods I can use?

Solution

  • CopyOnWriteArrayList

    There is a concurrent List implementation in java.util.concurrent: CopyOnWriteArrayList.

    Caveat: CopyOnWriteArrayList copies the entire list for each and every "mutative operations (add, set, and so on)". So this class performs better for read-heavy applications.