原文网址:http://blog.csdn.net/cool_sti/article/details/21658521 原英文链接:http://javarevisited.blogspot.hk/2014/03/how-to-clone-collection-in-java-deep-copy-vs-shallow.html 程序员通常会误用集合类(如List、Set、ArrayList、HashSet)所提供的拷贝构造函数或其它方法来完成集合的拷贝。值得记住的一点是...
arraylist（可变数组）,linkedlist（底层链表结构）,hashset（底层哈希表）,treeset（底层二叉树）都有相应...
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It accepts not only HashSet, but all the Collections typesi.e.ArrayList,LinkedList,HashSet. If the specified collection is also a set, this operation effectively modifies this set so that its value is theasymmetric set differenceof the two sets. Java Program import java.util.HashSet; import ...
and not PrintQueue. Applying this guideline to this class – HashSet, while more technically precise, isn’t as recognizable at Set. You can see this guideline in other class names in the System.Collections.Generic namespace: List<T> instead of ArrayList<T>, Dictionary<T> instead of Hash...
All ordered containers provide stateful iterators and some of them allow enumerable functions. DataStructureOrderedIteratorEnumerableReferenced by Lists ArrayList yes yes* yes index SinglyLinkedList yes yes yes index DoublyLinkedList yes yes* yes index Sets HashSet no no no index TreeSet yes yes* ...
All ordered containers provide stateful iterators and some of them allow enumerable functions. DataStructureOrderedIteratorEnumerableReferenced by Lists ArrayList yes yes* yes index SinglyLinkedList yes yes yes index DoublyLinkedList yes yes* yes index Sets HashSet no no no index TreeSet yes yes* ...
当我们深入学习了源码之后,我们就能够了解其特性,从而能够根据我们的使用场景去做出更好的选择,从而让我们的代码运行效率更高。 我们举一个最简单的例子 —— ArrayList 和 LinkedList。它们两者底层采用了完全不同的实现方式,ArrayList 使用数组实现,而 LinkedList 则使用链表实现。这使得 Arra... ...
获取空集对象(没有元素的集合,注意集合不为null): 常用的集合类: HashSet/ArrayList/HashMap都是线程不安全的,在多线程环境下不安全. 在Collections类中有获取线程安全的集合方法: List list Java 集合系列16之 HashSet详细介绍(源码解析)和使用示例 ://www.cnblogs.com/skywang12345/p/3311252.html 第1部分 ...
we are going to perform a performance comparison between the three probably most usedCollectionimplementation classes. To make things more realistic we are going to test against a multi–threading environment so as to discuss and demonstrate how to utilizeVector,ArrayListand/orHashSetfor high performan...