//foreach也是使用迭代器(iterator)进行循环,相当于调用迭代器的next()方法,下面来看看next()方法:publicE next() { checkForComodification();inti =cursor;if(i >=size)thrownewNoSuchElementException(); Object[] elementData= ArrayList.this.elementData;if(i >=elementData.length)thrownewConcurrentModification...
*/publicclassArrayListDelete{publicstaticvoidmain(String[] args){ Predicate<String> predicate = p -> p.equals("a") || p.equals("b");// 可以正常删除结果正确deleteByIterator(getList(), predicate);// 可以正常删除结果正确deleteByReverseOrder(getList(), predicate);// 可以删除 结果不正确deleteB...
data = new ArrayList<Integer>(); p_start = 0; } /** Insert an element into the queue. Return true if the operation is successful. */ public boolean enQueue(int x) { data.add(x); return true; }; /** Delete an element from the queue. Return true if the operation is successful....
4 4. 在步骤三中创建的class文件下，添加如下代码import java.util.ArrayList;import java.util.Arrays;import java.util.Iterator;import java.util.List;public class DeleteArrayElementClass {public static void main(String[] args) {String[] ss = new String[10];ss[0] = "/article/90808022090decfd...
Java ArrayList.removeAll() method accepts a collection of elements and removes all occurrences of the elements of the specified collection from this arraylist. In contrast, the remove() method is used to remove only the first occurrence of the specified element. Quick ReferenceArrayList<String> ...
ArrayList remove() removes the first occurrence of the specified element from this list, if it is present, else the list remains unchanged.
最近在看ArrayList源码的时候,做了一个ArrayList循环遍历删除的列子,遇到了两个坑,和大家分享一下 情况一: public class TestDelete { public static void main(String[] args) { ArrayList<String> list = new ArrayList<String>(); list.add("A"); ...
java的api中,并没有提供删除数组中元素的方法。虽然数组是一个对象,不过并没有提供add()、remove()或查找元素的方法。这就是为什么类似ArrayList和HashSet受欢迎的原因。 不过,我们要感谢Apache Commons Utils,我们可以使用这个库的ArrayUtils类来轻易的删除数组中的元素。不过有一点需要注意,数组是在大小是固定的,这...
The deletion of an element in the ArrayList is straight forward. It requires one simple call to an inbuilt function. package com.journaldev.java; import java.util.ArrayList; import java.util.Arrays; public class Main { public static void main(String[] args) { int[] arr = new int[]{1,...
我想使用Iterator-对象遍历element-typeArrayList的集合,以删除满足特定条件的元素,例如包含String-value。我已经编写了一个方法(见下文),但是它不编译。哪里会出错?类型ArrayList的集合具有variable-nametracks并已定义。 public void deleteTrackWithCharacters(String characters){ Iterator<Tracks> it = tracks.iterator()...