How to make ArrayList Thread-Safe in Java?

In Java, Thread is the smallest unit of execution within the program. It represents an independent path of execution that can run concurrently with other threads. When dealing with multi-threaded applications, where multiple threads are accessing and modifying data concurrently, it’s crucial to ensure that data structures like ArrayList are handled in a way that prevents conflicts and maintains data integrity.

In this article, we will explore the basic process of making an ArrayList thread-safe in a Java program.

Making ArrayList Thread-Safe in Java

To make ArrayList Thread-Safe, we can follow the below approach:

Syntax:

// It is a general syntax public static List synchronizedList(List list) //Use it for that code // Create a regular ArrayList List normalList = new ArrayList<>(); // Make it thread-safe using Collections.synchronizedList List synchronizedList = Collections.synchronizedList(normalList);

The synchronizedList() method of the Java Collections class is used to get a synchronized (thread-safe) version of a specified list. This method wraps up our original list and returns a synchronized view of it.