blocks|key|1859358|text|我想知道JVM到底有多普及？在闪存的情况下，IE5预装了它，给了它一个很大的自动用户群。但是，除非JVM包含在OS安装中，否则用户不会拥有它。我认为作为一名开发人员，你的目标是最大的安装基础，这意味着选择Flash而不是Java。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1859359|到处都有Java+applet；但肯定不是很普及。|1859360|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I wonder how widespread the JVM actually is? In the case of Flash, IE5 preinstalled it, giving it a large automatic user base. But unless the JVM was included with the OS install, users wouldn't have it. I suppose as a developer you target the largest install base, meaning choosing Flash over Java.

There are Java applets here and there; definitely not widespread though.

blocks|key|1859373|text|我相信是他们的丑陋使他们远离现代网络。flash带来了设计，javascript带来了在客户端制作一些很酷的东西的便捷方式。作为浏览器中的一个盒子(虽然就像flash，但丑陋得多)，applet技术被抛弃了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1859374|实际上，唯一可能会被遗漏的是在web内部有一种‘客户端-服务器’类型的通信的可能性，因为java+applet可以有一个有状态的连接。另一方面，你必须在另一边放置一些服务器，并为它打开一个端口，这对于共享主机环境来说是太多的家务活。|1859375|applets仍然生活在一些不同的领域，比如道路、隧道、发电厂等的控制中心。|1859376|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

i believe it's their ugliness that kept them away from the modern web. flash brought the design, javascript brought a convenient way to make some cool things on a client. being a box inside a browser (just like a flash, though, but much uglier) applet technology was put away.

actually, the only thing that might be missed is the possibility to have a 'client-server' type of communication inside the web, because java applet could have a stateful connection. on the other hand, you would have to put some server on the other side and open a port for it, which just was too much house-work for shared hosting environments.

applets still live in some different areas, like control centers for roads, tunnels, power plants and stuff like that.

blocks|key|2073258|text|人们仍然在使用applet。但你是对的，有很多不同的解决方案。例如，看一看javafx|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2073259|entityMap|0|LINK|mutability|MUTABLE|url|http://java.sun.com/javafx/^0|11|6|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

People still use applets. But you are right, there are tons of different solutions out there. For example, take a look at <a href="http://java.sun.com/javafx/" rel="nofollow noreferrer">javafx</a>

blocks|key|2073278|text|我认为兼容性问题是一个很大的问题。最值得注意的是IE和微软的Java+VM，它们并不像以前那样符合标准。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2073279|即使使用Sun，您也可能会遇到问题。我发现有两个第三方Applets需要不同版本的Java，这会导致各种各样的问题。Sun试图通过用Java+Web+Start替换小程序来解决这个问题，它在浏览器中给出一个链接，在它自己的窗口中启动应用程序，而不是在浏览器内部。(从理论上讲，通过JWS，您可以让不同的应用程序使用不同的VM，但是它对我来说似乎从来没有像它应该的那样工作。)|offset|length|2073280|JavaScript的进步也使得开发更丰富的网页成为可能，因此许多过去只能在Applet中完成的事情现在可以简单地使用AJAX完成。|2073281|entityMap|0|LINK|mutability|MUTABLE|url|http://java.sun.com/javase/technologies/desktop/javawebstart/index.jsp^0|0|1U|E|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@$D|R|E|S|1|T]]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

I think compatibility issues were a big problem. Most notably with IE and Microsoft's Java VM which wasn't as standards compliant as it might have been.

Even with the Sun JVM you could have problems. I've had fun where I've had two 3rd-party Applets requiring different versions of Java which causes all sorts of problems. Sun have tried to solve this problem by replacing Applets with <a href="http://java.sun.com/javase/technologies/desktop/javawebstart/index.jsp" rel="nofollow noreferrer">Java Web Start</a> which gives you a link in the browser that launches the application in it's own window instead of inside the browser. (In theory with JWS you can have different applications using different VMs but it never seems to work for me as well as it should.)

Advancements with JavaScript have also made it possible to developer much richer web pages so a lot of things in the past that you could only do in Applets can now be done simply with AJAX.

blocks|key|1859414|text|我经常在acedemic环境中看到它们(托管在系或教员网站上)，但你说得对，它们并不是很受欢迎。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1859415|但是，请记住Java的大承诺已经实现了。我们有Flash，Java+Applets，Silverlight和不断改进的JavaScript框架。|1859416|现在，如果我补充一点个人意见--我认为Java+applet是不优雅的。它们往往看起来很丑陋，Java运行时使得它在操作系统中的存在太广为人知(在运行时可视化、更新和丑陋的安装程序方面)。Flash凭借其富媒体环境和透明(且无处不在)的部署而变得更好。|1859417|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I see them a lot in acedemic settings (hosted on department or faculty sites), but you're right in that they are not very popular.

However, remember that Java's big promise has been achieved. We have Flash, Java Applets, Silverlight, and ever-improving JavaScript frameworks.

Now if I made add a personal opinion - I think that Java applets are inelegant. They tend to look ugly, the Java runtime makes its presence in the OS far too known (in terms of runtime visuals, updates, and the ugly installer). Flash is much better with its rich media environment and its transparent (and ubiquitous) deployment.

blocks|key|1859531|text|我认为Java+applets被Flash和ActionScript+(双关语无意)所掩盖，更容易用于当时正在使用的Java+Applets+(动画%2B有状态应用程序)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1859532|Flash在这方面的成功反过来归功于它的小得多的文件大小，以及受益于Sun对微软的诉讼，在Netscape消亡和IE占据主导地位的时候，微软将MSJVM从Internet+Explorer中移除。|1859533|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I think Java applets were overshadowed by Flash and ActionScript (pun unintended), being much easier to use for what Java Applets were being used at the time (animations + stateful applications). 

Flash's success in this respect in turn owes to its much smaller file sizes, as well as benefiting from the Sun vs. Microsoft suit that resulted in Microsoft removing the MSJVM from Internet Explorer, at a time of Netscape's demise and IE's heavy dominance.

blocks|key|2073426|text|当Java的GUI+API完全停止糟糕的时候，每个人都在使用Flash。即使在今天，Java在制作奇特的图形方面也比不上Flash。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2073427|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

By the time Java's GUI API stopped totally sucking, everyone was using Flash. And even today, Java is no where near as good as Flash at doing fancy graphics.

blocks|key|1859571|text|JVM非常广泛，特别是在公司世界中，至少在我工作过的地方，总是安装了JVM。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1859572|我目前正在开发一个Java+Applet，但一般来说，除非迫不得已，否则我永远不会使用applet。但话又说回来，我也不会使用Flash或Silverlight。小应用程序的加载速度很慢，并且在网页中看起来不合适。此外，Macromedia/Adobe在市场上的销量也超过了优秀的小应用程序。|1859573|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

The JVM is very widespread, especially in the coorporate world, at least where I've worked, there was always a JVM installed.

I'm currently working on a Java Applet, but in general, I would never an applet unless I had to. But then again, I wouldn't use Flash or Silverlight, either. Applets have a slow load time, and look out of place in webpages. Also, Macromedia/Adobe have outmarketed the good ol' applets.

blocks|key|2073444|text|我认为这是因为java是一个“真实的”，即。通用语言。要创建applet，您必须编写代码，并且没有任何快捷方式。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2073445|现在flash等已经出现了，你可以通过为你的网站制作一个很酷的动画来完成你的工作。这是一个低得多的入门门槛-你不需要知道如何编程才能让flash动画工作。因此flash大量涌现，java+applet几乎不再被使用。|2073446|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I assume it's because java is a "real", ie. general purpose language. To make an applet, you have to write code, and there aren't any shortcuts.

Now that flash etc have come along, you can pretty much just drap and drop your way through making a cool animation for your website. This is a much lower barrier for entry - you don't have to know how to program in order to get a flash animation working. So flash proliferates, and java applets are hardly used anymore.

blocks|key|1859579|text|1)+AWT是为可怕的UI设计的。Swing对此有所改进，但为时已晚，因为...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1859580|2)微软在浏览器中放弃了对Java的支持(它的原生MSJVM)，在此之前，它只支持它发布的最后一个版本，该版本大致与JDK+1.1兼容。|1859581|3)所以今天你不能保证applet能在大多数非开发人员的机器上运行，不像flash。|1859582|顺便说一句，ActiveX也是如此。|1859583|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

1) AWT made for horrid UIs. Swing improved on that but it was too late, because... 
2) Microsoft dropped support for Java in the browser (its propietary MSJVM), and before it did, it would only support the last version it released, which was roughly JDK 1.1 compatible. 
3) So today you cannot be sure that an applet will run on the majority of non-developer machines, unlike flash. 

Same can be said of ActiveX by the way.

blocks|key|2073454|text|它们花了很长时间才能加载并在浏览器中运行，然后对许多人来说它们不起作用。当它们最终加载时，界面是丑陋和笨拙的。我认为糟糕的用户体验是让applet过时的一大步。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2073455|因此，为了回答最初的问题，我有一个自己的问题--您问“为什么站点不再使用java+applet”，而我的回答是“为什么会有人想这样做？”|2073456|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

They took forever to load up and get going in the browser, and then for a lot of people they didn't work. When they finally did load, the interfaces were ugly and clunky. I think the poor user experience was a big step towards making applets obsolete.

So to answer the original question I have a question of my own - you ask "Why don't sites use java applets anymore", and my response is "why would anyone want to?"

blocks|key|2073511|text|值得一试的是，Sun再次将资金和资源投入到applet中。他们已经在JDK+1.6.10中做了一些非常重要的改进，以减轻过去展示的许多“笨拙”的小应用程序。例如，使用此更新，您可以在applet加载时显示您自己的自定义加载图像/动画，并且该插件已被用于主要节食以提高性能。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2073512|他们还启动了一项计划，直接与闪存和Silverlight+-+JavaFX竞争。|2073513|市场是否会对此做出反应还有待观察，但考虑到Flash在市场中的主导地位，这对Sun来说无疑是一个令人着迷的举动。|2073514|entityMap|0|LINK|mutability|MUTABLE|url|http://java.sun.com/developer/technicalArticles/javase/java6u10/|1|http://www.sun.com/software/javafx/^0|Y|A|0|0|V|6|1|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@$A|S|B|T|1|U]]|C|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@$A|W|B|X|1|Y]]|C|$]]|$1|F|3|G|5|6|7|Z|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|10|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]|P|$5|K|L|M|C|$N|Q]]]]

For what it's worth, Sun is pouring money and resources into applets again. They've made some really significant improvements in <a href="http://java.sun.com/developer/technicalArticles/javase/java6u10/" rel="noreferrer">JDK 1.6.10</a> to mitigate a lot of the 'clunkiness' applets used to exhibit. For instance, with this update, you can display your own custom loading image/animation while your applet loads, and the plugin has been put on a major diet to improve performance.

They've also embarked upon an initiative to directly compete with Flash and Silverlight - <a href="http://www.sun.com/software/javafx/" rel="noreferrer">JavaFX</a>.

Whether or not the market will respond to any of this remains to be seen, but it's certainly a fascinating move on Sun's part given Flash's dominance in the market place.

blocks|key|2073538|text|首先，他们没有消失。你仍然可以在Web上找到很多applet，很多人专门用它们来演示算法之类的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2073539|优点:可以利用现有的库(数学、物理、排序、图形等)而且它比Flash更快。|2073540|不便:针对最近的JVM可能有风险(尽管Sun在自动更新方面做得很好，看起来很多人已经在使用Java1.6)，加载时间有点慢(尽管那里已经取得了很大的进展)。|2073541|你仍然可以找到许多游戏小程序，比如Bookworm，可能还有一个额外的好处，那就是已经完成了部分工作，可以在手机上运行它们。|offset|length|2073542|其次，我可以预测JavaFX会重新引起人们的兴趣。使用类固醇的小应用程序，能够打破“小应用程序很丑陋”的传说...:-)|2073543|最后，像Processing这样的库使得创建图形密集型小程序变得非常容易，你可以在网上找到很多这样的小程序，例如。在OpenProcessing上，最差的(编程初学者)几乎是最好的！|2073544|entityMap|0|LINK|mutability|MUTABLE|url|http://www.en.zylom.com/game/118/bookworm.html|1|http://processing.org/|2|http://openprocessing.org/^0|0|0|0|H|8|0|0|0|4|A|1|1M|E|2|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|10|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|11|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|12|8|@]|9|@$H|13|I|14|1|15]]|A|$]]|$1|J|3|K|5|6|7|16|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|17|8|@]|9|@$H|18|I|19|1|1A]|$H|1B|I|1C|1|1D]]|A|$]]|$1|N|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|U]]|V|$5|Q|R|S|A|$T|W]]|X|$5|Q|R|S|A|$T|Y]]]]

First, they not gone. You can still find lot of applets on the Web, lot of people use them particularly to demonstrate algorithms and such. 
Advantages: can leverage existing libraries (math, physics, sorting, graph, etc.) and it is faster than Flash. 
Inconvenience: it might be risky to target a recent JVM (although Sun did a good job on automatic updates, looks like lot of people are using Java 1.6 already), load time is a bit slow (even though great progress have been made there).

You can still find lot of game applets too, like <a href="http://www.en.zylom.com/game/118/bookworm.html" rel="nofollow noreferrer" title="Bookworm">Bookworm</a>, with the added advantage, perhaps, to have part of work already done to run them on mobile phones...

Second, I can predict a regain of interest with JavaFX. Applets on steroids, able to break legend of "applets are ugly"... :-)

Last, a library like <a href="http://processing.org/" rel="nofollow noreferrer" title="Cover">Processing</a> makes super easy to create graphical intensive applets, and you can find lot of them on the Net, eg. on <a href="http://openprocessing.org/" rel="nofollow noreferrer" title="OpenProcessing">OpenProcessing</a> where the worst (beginners in programming) is near the best!

blocks|key|2073623|text|人们仍然在使用applet，至少在我工作的公司是这样。小程序主要由内部用户使用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2073624|我觉得applet有它的好处，因为在服务器端使用Java的公司，很可能会有一大批更擅长Java的人才。|2073625|虽然也许其他技术，如Javascript，HTML/CSS或flash更受欢迎或更奇特，但人才库可以更好地使用Java+applet创建web应用程序，因为这是一种他们通过与服务器端的工作已经熟悉的语言。|2073626|对于Java人才库来说，使用Java+applet解决方案以比任何其他技术更高的精度交付更改请求可能会更快。|2073627|有时，技术解决方案中最重要的事情是其功能以及需要为其提供支持的人员对更改做出反应的速度。|2073628|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|N|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|O|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

People are still using applets, at least for the company that I am working with. The applets are used mainly by internal users.

I feel that applets have their benefits, as companies which employ Java at the server side, most probably will have a large pool of talents who are better skilled at Java. 

Although perhaps other technologies like Javascript, HTML/CSS or flash are more popular or more fanciful, but the talent pool could be better employed to create web apps with Java applets as it is a language that they are already familiar with through their work with the server end stuff.

It could be faster for the Java talent pool to deliver a change request with Java applet solutions at a higher accuracy than any other technologies.

Sometimes, the most important thing in a technology solution is its functionality and how fast people who need to provide support for them can react to changes.

When java was young, people were excited about writing applets. They were cool and popular, for a little while. Now, I never see them anymore. Instead we have flash, javascript, and a plethora of other web app-building technologies.

Why don't sites use java applets anymore?

I'm also curious: historically, why do you think this occurred? What could have been done differently to keep Java applets alive?

Where did all the java applets go?

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在java还很年轻的时候，人们对编写applet很感兴趣。在一小段时间内，它们很酷，很受欢迎。现在，我再也见不到他们了。取而代之的是flash、javascript和大量的其他web应用构建技术。为什么网站不再使用java applet？我也很好奇:从历史上看，你认为为什么会发生这种情况？本可以采取哪些不同的方法来保持...

问所有的java applet都到哪里去了？
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