Question

How to use CopyOnWriteArrayList (thread-safe version of an ArrayList) in Java

Answer 1

import java.util.concurrent.CopyOnWriteArrayList;

public class MyClass {
    public static void main(String args[]) {
        CopyOnWriteArrayList<Integer> alist = new CopyOnWriteArrayList<>();
        
        System.out.println("Is ArrayList Empty: " + alist.isEmpty());

        alist.add(5);
        alist.add(2);
        alist.add(3);

        System.out.println("The ArrayList: " + alist);
        System.out.println("Is ArrayList Empty: " + alist.isEmpty());
    }
}




/*
run:
  
Is ArrayList Empty: true
The ArrayList: [5, 2, 3]
Is ArrayList Empty: false
  
*/

 

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