基于HashSet构造一个新的同步Set

/** from 
时代Java - N o w  J a v a . c o m**/

//package com.nowjava;


import java.util.Collections;


import java.util.HashSet;


import java.util.Set;


public class Main {

    public static void main(String[] argv) {

        System.out.println(synchronizedSet());

    }


    /**

     * Constructs a new synchronized {@code Set} based on a {@link HashSet}.

     * 

     * @return a synchronized Set

     */

    public static <T> Set<T> synchronizedSet() {

        return Collections.synchronizedSet(new HashSet<T>());

    }


    /**

     * Constructs a new synchronized {@code Set} based on a {@link HashSet} with

     * the specified {@code initialCapacity}.

     * 

     * @param initialCapacity

     *            the initial capacity of the set

     * 

     * @return a synchronized Set

     */

    public static <T> Set<T> synchronizedSet(