ArrayList类 : ArrayList « 集合 « Java 教程

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Java 教程 » 集合 » ArrayList

9. 10. 1. ArrayList类

The ArrayList class is the Collection Framework's replacement for the Vector class.

The main difference is: ArrayList is not synchronized by default, whereas Vector is. Both maintain their data in an ordered fashion.

Ordered means the elements are held according to the positional index inserted, sorted refers to the comparison of element values for ordering.

The ArrayList and Vector provide quick, random access to elements at a cost of slower insertion and deletion of those elements not at the end of the list.

If you need to frequently add and delete elements from the middle of the list, consider using a LinkedList.

9. 10. ArrayList
	9. 10. 1.	ArrayList类
	9. 10. 2.	创建一个ArrayList
	9. 10. 3.	A boolean is being stored and then retrieved from an ArrayList
	9. 10. 4.	The final constructor is the copy constructor: creating a new ArrayList from another collection
	9. 10. 5.	添加元素
	9. 10. 6.	在中间添加元素
	9. 10. 7.	Add an element to specified index of ArrayList
	9. 10. 8.	Append all elements of other Collection to ArrayList
	9. 10. 9.	Insert all elements of other Collection to Specified Index of ArrayList
	9. 10. 10.	To create a read-only list, use the unmodifiableList() method of the Collections class
	9. 10. 11.	添加到另一个集合
	9. 10. 12.	Getting an Element
	9. 10. 13.	获得ArrayList的子集
	9. 10. 14.	去除元素
	9. 10. 15.	Removing Another Collection(Removing elements): public boolean removeAll(Collection c)
	9. 10. 16.	Retaining Another Collection: public boolean retainAll(Collection c)
	9. 10. 17.	删除范围
	9. 10. 18.	元素与迭代器
	9. 10. 19.	Checking for Existence: public boolean contains(Object element)
	9. 10. 20.	检查位置
	9. 10. 21.	Checking for List Containment: public boolean containsAll(Collection c)
	9. 10. 22.	Replacing Elements with the set() method: public Object set(int index, Object element)
	9. 10. 23.	检查大小
	9. 10. 24.	检测容量
	9. 10. 25.	After adding all of the elements, call the trimToSize() method
	9. 10. 26.	复制和克隆列表
	9. 10. 27.	ArrayList implements the empty Serializable interface
	9. 10. 28.	检查相等
	9. 10. 29.	复制清单内容到一个数组
	9. 10. 30.	Convert a List (ArrayList) to an Array with zero length array
	9. 10. 31.	Convert a List (ArrayList) to an Array with full length array
	9. 10. 32.	复制所有元素到数组
	9. 10. 33.	从一个ArrayList删除重复的元素
	9. 10. 34.	移除所有内容
	9. 10. 35.	Looping through a Collection object: while loop, iterator, and for each
	9. 10. 36.	如果一个ArrayList包含某一元素
	9. 10. 37.	ArrayList搜索元素与索引和lastIndexOf
	9. 10. 38.	从ArrayList的迭代器获取容器

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