The CopyOnWriteArrayList class in Java is part of the java.util.concurrent package and provides a thread-safe variant of ArrayList. This class is designed to handle scenarios where read operations vastly outnumber write operations. Every update operation results in a new copy of the underlying array, which makes it suitable for read-heavy use cases.
This guide covers various methods available in the CopyOnWriteArrayList class. Each method is described in simple terms to help beginners understand how to use them. These methods allow you to perform operations like adding, removing, and accessing elements in a thread-safe manner.
For more detailed information, please refer to the official Java SE Documentation and additional resources on Java Collections Tutorial. Also, check out this comprehensive CopyOnWriteArrayList Tutorial for more examples and usage scenarios.
Java CopyOnWriteArrayList Class Methods
The table below contains various methods of the Java CopyOnWriteArrayList class, each with a link to a detailed explanation, examples, and real-world uses. Click on the method names to learn more about how to use them effectively in your applications.
| Method | Description |
|---|---|
| add() | Adds an element to the list. If the list already contains the element, it does not add a duplicate. |
| get() | Returns the element at the specified position in the list. |
| size() | Returns the number of elements in the list. |
| isEmpty() | Returns true if the list contains no elements. |
| clear() | Removes all elements from the list. |
| indexOf() | Returns the index of the first occurrence of the specified element in the list, or -1 if the list does not contain the element. |
| lastIndexOf() | Returns the index of the last occurrence of the specified element in the list, or -1 if the list does not contain the element. |
| addAll() | Adds all of the elements in the specified collection to the list. |
| remove() | Removes the first occurrence of the specified element from the list, if it is present. |
| iterator() | Returns an iterator over the elements in the list in proper sequence. |
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