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

public class ConstructsANewSynchronizedList {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println(synchronizedList());
    }
    /**
     * Constructs a new synchronized {@code List} based on a {@link LinkedList}.
     * 
     * @return a synchronized List
     */
    public static <E> List<E> synchronizedList() {
        return Collections.synchronizedList(new LinkedList<E>());
    }

    /**
     * Constructs a new synchronized {@code List} based on a {@link ArrayList}
     * with the specified {@code initialCapacity}.
     * 
     * @param initialCapacity
     *            the initial capacity of the array list
     * 
     * @return a synchronized List
     */
    public static <E> List<E> synchronizedList(final int initialCapacity) {
        return Collections.synchronizedList(new ArrayList<E>(
                initialCapacity));
    }
}
Console：
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