hello Exception in thread"main"java.util.ConcurrentModificationExceptionatjava.util.ArrayList$Itr.checkForComodification(ArrayList.java:911)atjava.util.ArrayList$Itr.next(ArrayList.java:861)atmoudle2.Test15.main(Test15.java:17)Process finished with exit code1 因为此时集合本身被破坏了,迭代出现错误。 ...
//StringTokenizer : 切割, Breaks a string into tokens; new code should probably use {@link String#split}.Enumeration enumeration=newStringTokenizer("A-B-C","-");while(enumeration.hasMoreElements()){System.out.println(enumeration.nextElement());} 运行结果: Enumeration 接口早在 JDK 1.0 时就推...
这个Counter就是一个迭代器,但是目前它没有什么太大的作用,因为我们不可能每次通过手动调用__next__方法来进行操作。 好消息是,很多编程软件为我们提供了一个“语法糖”(syntactic sugar),让这个语法糖来替我们反复执行__next__方法,比如python中的"for.. in",但是,为了让这个反复执行的过程停下来,我们同样需要...
package java.util; import java.util.function.Consumer; /** * An iterator over a collection. {@code Iterator} takes the place of * {@link Enumeration} in the Java Collections Framework. Iterators * differ from enumerations in two ways: * 集合上的迭代器。Iterator 在Java集合框架中取代了Enumer...
*该字段由迭代器和列表迭代器实现使用,由{@code迭代器}和{@code listtiterator}方法返回。 *如果该字段的值发生了意外变化,迭代器(或列表)将返回该字段迭代器)将抛出{@code ConcurrentModificationException} *在响应{@code next}, {@code remove}, {@code previous},{@code set}或{@code add}操作。这提供...
Data Structures and Algorithms in Java, 6th Editionlearning.oreilly.com/library/view/data-structures-and/9781118771334/11_chap07.html#chap07 迭代器是一种scanning through一系列元素,每次一个的一种软件设计模式。底层的迭代元素可能是被一个容器类所存储,也有可能是经过一系列的运算生成的。
Java Iterators reference 1. Introduction AnIteratoris one of many ways we can traverse a collection, and as every option, it has its pros and cons. It was first introduced in Java 1.2 as a replacement ofEnumerationsand: introduced improved method names ...
Note: Trying to remove items using a for loop or a for-each loop would not work correctly because the collection is changing size at the same time that the code is trying to loop.Exercise? What is a correct syntax to create an Iterator object named it for a cars collection? Iterator<...
Source Code on Github Lokesh Gupta A fun-loving family man, passionate about computers and problem-solving, with over 15 years of experience in Java and related technologies. An avid Sci-Fi movie enthusiast and a fan of Christopher Nolan and Quentin Tarantino....
Dalvik.Bytecode Dalvik.SystemInterop Java.Awt.Font Java.Beans Java.Interop Java.Interop.Expressions Java.Interop.Tools.JavaCallableWrappers Java.IO Java.Lang Java.Lang.Annotation Java.Lang.Invoke Java.Lang.Ref Java.Lang.Reflect Java.Lang.Runtimes Java.Math Java.Net Java.Nio Java.Nio.Channels Java...