Exception in thread "main" java.util.ConcurrentModificationException 在Java 中使用 CopyOnWriteArrayList 类同步 ArrayList 1. CopyOnWriteArrayList 实现了 List 接口并创建一个空列表。 2.它按指定集合的顺序创建元素列表。 3. 是数组列表的线程安全并发访问。修改 ArrayList 时,它将创建底层数组的新副本。 4. CopyO...
ArrayListis an ordered sequence of elements. It is dynamic and resizable. It provides random access to its elements. Random access means that we can grab any element at constant time. AnArrayListautomatically expands as data is added. Unlike simple arrays, anArrayListcan hold data of multiple da...
ArrayList 是一个数组队列,相当于动态数组。与Java中的数组相比,它的容量能动态增长。它继承于AbstractList,实现了List,RandomAccess[随机访问],Cloneable[可克隆], java.io.Serializable[序列化]这些接口。 ArrayList 继承了AbstractList,实现了List。它是一个数组队列,提供了相关的添加、删除、修改、遍历等功能。 Arra...
RandomAccess, Cloneable, java.io.Serializable { // 序列版本号 private static final long serialVersionUID = 8683452581122892189L; // ArrayList基于该数组实现,用该数组保存数据 private transient Object[] elementData; // ArrayList中实际数据的数量 private int size; // ArrayList带容量大小的构造函数。
*/transient Object[]elementData;// non-private to simplify nested class access 6.数组长度 size 属性源码: 代码语言:javascript 复制 /** * The size of the ArrayList (the number of elements it contains). * * @serial */privateint size; ...
java.util Class ArrayList<E> All Implemented Interfaces: Serializable,Cloneable,Iterable<E>,Collection<E>,List<E>,RandomAccess Direct Known Subclasses: AttributeList,RoleList,RoleUnresolvedList public classArrayList<E>extendsAbstractList<E> implementsList<E>,RandomAccess,Cloneable,Serializable ...
2. RandomAccess接口的含义? package java.util; /** * Marker interface used by List implementations to indicate that * they support fast (generally constant time) random access. The primary * purpose of this interface is to allow generic algorithms to alter their * behavior to provide good perf...
class ArrayList<E> extends AbstractList<E> implements List<E>, RandomAccess, Cloneable, java.io.Serializable ArrayList继承了AbstractList接口,实现了List,以及随机访问,可克隆,序列化接口。不是线程安全的,如果需要线程安全,则需要选择其他的类或者使用Collections.synchronizedList(arrayList)允许存储null元素,也允许...
RandomAccess, 实现随机访问接口 Cloneable, 实现克隆接口 java.io.Serializable 实现序列化接口 * transient Object[] elementData; 真是存放数据的数组 * * private int size; 当前集合中存储的元素个数 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Java集合框架:ArrayList 简介:ArrayList定义package java.util;public class ArrayList extends AbstractList implements List, RandomAccess, Cloneable, java. ArrayList定义 package java.util;publicclassArrayList<E>extendsAbstractList<E>implementsList<E>, RandomAccess, Cloneable, java.io.Serializable{privatestatic...