* @Project:test * @file:FailFastTest.java * @Authro:chenssy * @data:2014年7月26日 */privatestaticclassthreadTwoextendsThread{publicvoidrun(){int i=0;while(i<6){System.out.println("ThreadTwo run:"+i);if(i==3){list.
所以说,为了使用for..in语法糖来进行迭代我们的迭代器,你必须让你的迭代器可迭代(有点绕。。哈哈)。 这句话有两层含义: 1,为了使用for..in语法糖,你必须让你的迭代器可迭代 2,你如果不适用for..in语法糖,你就不必让你的迭代器可迭代,你可以自己写一个语法糖,不断地调用next方法,当遇到StopIteration例外的...
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针对迭代...
下面是一个实现这一目标的示例代码: importjava.util.ArrayList;importjava.util.Iterator;importjava.util.List;publicclassStudentList{privateList<String>students;publicStudentList(){students=newArrayList<>();students.add("Alice");students.add("Bob");students.add("Charlie");students.add("David");}public...
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 ...
In the example below, we have implemented thehasNext(),next(),remove()andforEachRemining()methods of theIteratorinterface in anArrayList. importjava.util.ArrayList;importjava.util.Iterator;classMain{publicstaticvoidmain(String[] args){// Creating an ArrayListArrayList<Integer> numbers =newArrayList<...
import java.util.*; public class Muster { public static void main(String[] args) { ArrayList list = new ArrayList(); list.add( "a" ); list.add( "b" ); list.add( "c" ); Iterator it = list.iterator(); while (it.hasNext()){ String str = (String) it.next();...
(1)类型转换异常:ClassCastException;集合中存放的是多个对象时,在强转时会出现; packagecom.oracle.demo01;importjava.util.ArrayList;importjava.util.Collection;importjava.util.Iterator;publicclassdemo01 {publicstaticvoidmain(String[] args) {method03(); ...
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Enumeration。
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 ...