fail-fast机制 fail-fast:它是Java集合(Collection)的一种错误机制。当多个线程对同一个集合进行修改结构操作,使用集合的迭代器iterator,会首先检测是否有对集合的并发修改,进而产生ConcurrentModificationException异常提示。 阅读ArrayList的add方法源码,可以注意到在add方法中,除了校验底层数组的容量是否需要扩充之外,恒久....
Explore the key differences between fail-fast and fail-safe iterators in Java, including their behaviors and use cases.
理解:java集合支持两种类型的迭代,分别是fail-fast与fail-safe.他们的主要区别是在迭代的时候能否对集合进行修改.如果你用的是ArrayList容器的话,当你进行迭代操作的时候,其他线程是不能够对它进行修改的.如果你在迭代的时候对集合进行添加或者删除操作,就会抛出ConcurrentModificationException异常,这就是所谓的fail-fast机...
java的快速失败和安全失败一:快速失败(fail—fast)在用迭代器遍历一个集合对象时,如果遍历过程中对集合对象的内容进行了修改(增加、删除、修改),则会抛出ConcurrentModificationException。原理:迭代器在遍历时直接访问集合中的内容,在遍历过程中使用一个modCount变量和expectedmodCount变量。 //用来记录List ...
https://www.geeksforgeeks.org/fail-fast-fail-safe-iterators-java/ Fail Fast and Fail Safe Iterators in Java 3 In this article, I am going to explain h
Fail-fast iterators in Java throw ConcurrentModificationException exception if the collection is modified while iterating over it. Fail-safe iterators do not throw any exception even if the collection is modified while iterating over it.
The concepts of fail-fast and fail-safe iterators emerged as relatively recent additions in Java, initially introduced alongside Concurrent Collections such as ConcurrentHashMap and CopyOnWriteArrayList in Java 5.Java Collections offer support for two distinct types of iterators: Fail-Fast iterators and ...
Java - Java集合中的快速失败Fail Fast 机制,文章目录什么是fail-fast什么是fail-fastfail-fast机制是Java集合(Collection)中的一种错误机制。在用迭代器遍历一个集合对象时,如果遍历过程中对集合对象的结构进行了修改(增加、删除),则会抛出ConcurrentModificationExce
This post will discuss the fail-fast iterator and fail-safe iterator in Java.. If a thread modifies the structure of a collection, while another thread (or same thread) is iterating over it, ConcurrentModificationException may be thrown by the iterator.
JAVA SE——线程 2019-12-04 08:24 −2019-12-03 16:11:02 创建线程的三种方式: 创建线程的方式一:继承Thread类 package com.wkcto.jbdc.test1; public class SubTh... JasonPeng1 0 168 论文阅读:Blink-Fast Connectivity Recovery Entirely in the Data Plane ...