This question already has an answer here: Is there a way to access an iteration-counter in Java's for-each loop? 14 answers You can't, you either need to keep the index separately: int index = 0; for(Element song : question) { System.out.println("Current index is: " + (index++)); } or use a normal for loop: for(int i = 0; i < question.length; i++) { System.out.println("
这个问题在这里已经有了答案： 有没有办法在Java的for-each循环中访问迭代计数器？ 14个答案 你不能，你需要单独保存索引： int index = 0; for(Element song : question) { System.out.println("Current index is: " + (index++)); } 或使用正常的循环： for(int i = 0; i < question.length; i++) { System.out.println("Current index is: " + i); } 原因是你可以使用condensed for语法来遍历任何Iterabl
什么是Java相当于LINQ？ There is nothing like LINQ for Java. ... Edit Now with Java 8 we are introduced to the Stream API, this is a simular kind of thing dealing with collections, but it is not quite the same as Linq. If it is a ORM you are looking for like Entity Framework, then you can try Hibernate :-) There is an alternate solution, Coollection. Coolection has not pretend to be
什么是Java相当于LINQ？ 没有什么像Java的LINQ。 ... 编辑 现在在Java 8中，我们介绍了Stream API，这是一种处理集合的类似事物，但与Linq并不完全相同。 如果它是一个你正在寻找的实体框架的ORM，那么你可以尝试Hibernate :-) 有一个替代解决方案，Coollection。 Coolection并没有假装成新的lambda，但是我们被这个lib将帮助的旧的遗留Java项目所包围。 它的使用和扩展非常简单，只覆盖了对集合进行迭代的最常用
I'm currently using Maven to build my Rhino JavaScript project, download dependent libraries, and manage the classpath at runtime. I'm able to run the JavaScript entry point by using the Maven exec plugin, in the following way: <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>exec-maven-plugin</artifactId>
我目前正在使用Maven构建我的Rhino JavaScript项目，下载相关库，并在运行时管理类路径。 我可以通过使用Maven exec插件运行JavaScript入口点，方法如下： <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>exec-maven-plugin</artifactId> <version>1.1</version> <executions> <exe
I'm new to OpenGL and I'm teaching myself by making a 2D game for Android with ES 2.0. I am starting off by creating a "Sprite" class that creates a plane and renders a texture to it. To practice, I have two Sprite objects that are drawn alternating in the same place. I got this much working fine and well with ES 1.0, but now that I've switched to 2.0, I am getting a blac
我是OpenGL的新手，我通过为ES 2.0制作Android游戏来教我自己。 我首先创建一个“Sprite”类，创建一个平面并为其呈现纹理。 为了练习，我有两个在同一个地方交替绘制的Sprite对象。 在ES 1.0中，我得到了很多很好的工作，但现在我已经切换到2.0了，我得到了一个没有错误的黑屏 。 我很努力想弄清楚我做错了什么，但我有强烈的感觉，它与我的着色器有关。 我将在这里转储所有相关的代码，希望有人可以给我一个答案或一些建议
I have recreated this project in Eclipse as many ways as I can think of and continue to get this same error- HTTP Status 404 - /SpringTest/hello type Status report message /SpringTest/hello description The requested resource (/SpringTest/hello) is not available. Please help me find the issue in my code below. web.xml - <?xml version="1.0" encoding="UTF-8"?> <web-app
我已经在Eclipse中重新创建了这个项目，尽可能多地考虑并继续得到相同的错误 - HTTP Status 404 - /SpringTest/hello type Status report message /SpringTest/hello description The requested resource (/SpringTest/hello) is not available. 请帮我在下面的代码中找到问题。 web.xml - <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-insta
I am trying to find all the broken links in the webpage using Java. Here is the code: private static boolean isLive(String link){ HttpURLConnection urlconn = null; int res = -1; String msg = null; try{ URL url = new URL(link); urlconn = (HttpURLConnection)url.openConnection(); urlconn.setConnectTimeout(10000); urlconn.setRequestMethod("GET");
我正在尝试使用Java在网页中查找所有损坏的链接。 代码如下： private static boolean isLive(String link){ HttpURLConnection urlconn = null; int res = -1; String msg = null; try{ URL url = new URL(link); urlconn = (HttpURLConnection)url.openConnection(); urlconn.setConnectTimeout(10000); urlconn.setRequestMethod("GET"); urlconn.connect();
I have some doubts about a JIT Compiler and an Interpreter. Starting from their definitions: (Interpreter) From Wikipedia: In computer science, an interpreter is a computer program that directly executes, ie performs, instructions written in a programming or scripting language, without previously batch-compiling them into machine language. An interpreter generally uses one of the following
我对JIT编译器和解释器有些怀疑。 从他们的定义开始： （Interpreter）维基百科： 在计算机科学中，解释器是一种计算机程序，可直接执行（即执行）以编程或脚本语言编写的指令，而无需将其批量编译为机器语言。 解释器通常使用以下策略之一来执行程序： 1）解析源代码并直接执行其行为 2）将源代码翻译成一些有效的中间表示并立即执行此操作 3）明确执行由作为解释器系统一部分的编译器所做的存储的预编译代码[1]
I'm trying to get a better understanding of the difference. I've found a lot of explanations online, but they tend towards the abstract differences rather than the practical implications. Most of my programming experiences has been with CPython (dynamic, interpreted), and Java (static, compiled). However, I understand that there are other kinds of interpreted and compiled languages.
我试图更好地了解这种差异。 我在网上找到了很多解释，但它们倾向于抽象的差异而不是实际的含义。 我的大部分编程经验都与CPython（动态，解释）和Java（静态，编译）有关。 但是，我知道还有其他种类的解释和编译语言。 除了可执行文件可以从编译语言编写的程序分发这一事实之外，每种类型都有哪些优点/缺点？ 通常情况下，我听到有人认为解释性语言可以交互使用，但我相信编译语言也可以具有交互式实现，是正确的吗？
I am working on a project in which there is a Java scheduler which is a HTTP Client and send xml as data to my node application. In index function of application.js I have written my logic to receive the xml and convert the respective xml to json but when I run my app then I am getting 404 response code from acs but the same is working when I am sending request from browser. Please suggest me w
我正在开发一个项目，其中有一个Java调度器，它是一个HTTP客户端，并将xml作为数据发送给我的节点应用程序。 在application.js的索引函数中，我写了我的逻辑来接收xml并将相应的xml转换为json，但是当我运行我的应用程序时，我从acs获取了404响应代码，但是当我从浏览器发送请求。 请告诉我我在这方面缺乏什么。 我发布了java http客户端和节点acs代码。 Java HTTP客户端代码是 URL url = new URL("http://localhost:
Is there a quite easy way to implement progress bars in JSP. Basically I have a JSP page that goes to a servlet that calls up a method, now this process is going to run for a long time and I want to indicate the status of the progress just like the progress bar that shows up in the eclipse taskbar when we execute any java program. I have found a nice tutorial here http://onjava.com/pub/a/onjav
是否有一种在JSP中实现进度条的非常简单的方法。 基本上我有一个JSP页面去调用一个方法的servlet，现在这个过程将运行很长时间，我想指出进度的状态，就像在eclipse任务栏中显示的进度条一样当我们执行任何Java程序时。 我在这里找到了一个很好的教程http://onjava.com/pub/a/onjava/2003/06/11/jsp_progressbars.html，但它似乎没什么过时的。 有没有什么新的和简单的方法来实现这一点？ 一旦进入细节，确定特定任务的进