你如何安装JDK？ [英] How do you install JDK?

问题描述

我有eclipse，我可以测试运行java应用程序，但我不知道如何编译它们。我读到我应该将javac -version输入到我的cmd.exe中，看看它是否被识别。不是这样。所以我去了sun的网站下载/安装了JDK v6。然而，它仍然说javac是一个无法识别的命令。我做错了什么？

谢谢！

更新
在阅读一些回复之后，好像我想要做的是创建一个可以在另一台计算机（运行时）上运行的.jar文件。但是，我无法确定如何做到这一点。这可能是因为我使用Flex Builder（eclipse），但是我也添加了创建java项目的能力。

谢谢

更新
OK我不想制作一个JAR文件，我不是想要归档它...制作程序的全部要发送给用户，所以他们可以使用程序...这是我想要做的...为什么这么难？

解决方案

当您将项目导出为Eclipse中的JAR文件（如Michael Borgwardt指出），JAR文件可以作为可执行文件，您可以指定什么是可执行类，这意味着哪一个具有入口点[aka public static void main（String [] args）]

如果用户安装了JRE，他/她可以双击它将被执行。

编辑： 有关如何工作的详细说明，请参阅如何创建可执行Java程序？

I have eclipse and I can test run java apps but I am not sure how to compile them. I read that I should type javac -version into my cmd.exe and see if it is recognized. It is not. So I went to sun's website and downloaded/installed JDK v6. Yet it still says 'javac' is an unrecognized command. What am I doing wrong?

Thanks!

UPDATE OK after reading some replies it seems like what I am trying to do is create a .jar file that can be ran on another computer (with the runtime). However I am having trouble figuring out how to do that. This might be because I am using Flex Builder(eclipse), but I added the ability to create java projects as well.

Thanks

UPDATE OK I do not want to make a JAR file, I am not trying to archive it...the whole point of making a program is to send it to users so they can use the program...THAT is what I am trying to do...why is this so hard?

解决方案

A JAR file can function as an executable, when you export your project as a JAR file in Eclipse (as Michael Borgwardt pointed out) you can specify what's the executable class, that meaning which one has the entry point [aka public static void main(String[] args)]

If the user installed the JRE he/she can double-click it and the application would be executed.

EDIT: For a detailed explanation of how this works, see the "How do I create executable Java program?"

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