import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/*
 Example of:  

 synchronizedList(List<T> list) method

 Parameters:

 list - the list to be "wrapped" in a synchronized list.

 Returns:

 a synchronized view of the specified list.
 */

public class CollectionsExample
{

    public static void main(String[] args)
    {

        ArrayList<Integer> arrayList = new ArrayList<Integer>();

        arrayList.add(2000);
        arrayList.add(3000);
        arrayList.add(4000);
        arrayList.add(1000);

        System.out.println("arrayList : " + arrayList + "\n");

        /*
         * Returns a synchronized (thread-safe) list backed by the specified
         * list.
         * 
         * In order to guarantee serial access, it is critical that all access
         * to the backing list is accomplished through the returned list.
         */

        List<Integer> synchronizedList = Collections
                .synchronizedList(arrayList);

        System.out.println("synchronizedList : " + synchronizedList + "\n");

    }

}