How to Synchronize ArrayList in Java?

We can use Collections.synchronizedList(List<T>) method to synchronize collections in java. The synchronizedList(List<T>) method is used to return a synchronized (thread-safe) list backed by the specified list.

import java.util.*;
public class SyncronizeArrayList {
	public static void main(String args[]) {
		// Non Synchronized ArrayList 
		List<String> fruitList = new ArrayList<String>();

		fruitList.add("Mango");
		fruitList.add("Banana");
		fruitList.add("Apple");
		fruitList.add("Strawberry");
		fruitList.add("Pineapple");

		// Synchronizing ArrayList in Java
		furitList = Collections.synchronizedList(fruitList);

		// we must use synchronize block to avoid non-deterministic behavior
		synchronized (fruitList) {
			Iterator<String> itr = fruitList.iterator();
			while (itr.hasNext()) {
				System.out.println(itr.next());
			}
		}
	}
}

Output: