代码语言:javascript 代码运行次数:0 运行 AI代码解释 importjava.util.ArrayList;importjava.util.Arrays;publicclassArrayListTest{classHuman{}classMaleextendsHuman{}publicstaticvoidmain(String[]args){ArrayList<Integer>list1=newArrayList<Integer>();list1.add(1);// Appends the specified element to the end ...
二、测试 本来自己写了一些测试类想测试下ArrayList和LinkedList的性能比较,发现怎么写都差强人意,今天在《Thinking inJava》中看到了这样的一段代码,个人觉得写得不赖。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 publicclassListPerformance{privatestaticfinal intREPS=100;privateabstractstaticclassTester//...
In this cases, Javascript's [], is a ArrayList, everytime you do shift or unshift it need to move the rest of items by one off which is slow operation for large amount of data. consta:number[]=[];functiontime(fn:()=>void):number{constnow=Date.now();fn();returnDate.now()-now...
不在循环中的删除,是没有问题的,否则这个方法也没有存在的必要了嘛,我们这里讨论的是在循环中的删除,而对 ArrayList 的循环方法也是有多种的,这里定义一个类方法 remove(),先来看段代码吧。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 publicclassArrayListTest{publicstaticvoidmain(String[]args){Array...
proto.indexOf=function(value) {for(varindexinthis.datas) {if(this.datas[index] ===value) {returnindex; } }return-1; }; proto.lastIndexOf=function(value) {for(varindex =this.size(); index >= 0; index--) {if(this.datas[index] ===value) {returnindex; ...
proto.indexOf=function(value) {for(varindexinthis.datas) {if(this.datas[index] ===value) {returnindex; } }return-1; }; proto.lastIndexOf=function(value) {for(varindex =this.size(); index >= 0; index--) {if(this.datas[index] ===value) {returnindex; ...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 // public void add(int index, E element) { // rangeCheckForAdd(index); // // ensureCapacityInternal(size + 1); // Increments modCount!! // System.arraycopy(elementData, index, elementData, index + 1, // size - index); // elementD...
例如说JavaScript里的Array类型就不保证是真的数组，而可能是下面的的任何一种可能：密集数组（dense ...
Programming Languages: [Java, JavaScript, Python] ArrayList after clear(): [] In the above example, we have created a arraylist namedlanguages. The arraylist stores the name of programming languages. Here, we have used theclear()method to remove all the elements oflanguages. ...
ArrayList 1: [JavaScript, Python, Java] ArrayList 2: [Java, Python] ArrayList 1 contains all elements of ArrayList 2: true ArrayList 2 contains all elements of ArrayList 1: false In the above example, we have created two arraylists namedlanguages1andlanguages2. Notice the expression, ...