Java“无法加载Main-Class清单属性".在任何.jar文件上，即使是我之前成功打开过的文件 [英] Java "Failed to load Main-Class manifest attribute" On a any .jar file, even those that I have succeed in opening before

问题描述

我刚刚开始学习Java编程，我已经使用Net-beans IDE创建了一个简单的游戏.我想把它展示给我的朋友，所以我将它内置到一个.jar中.根据Net bean生成的自述文件，我尝试使用

I have just began learning Java programming, I have created a simple game using Net-beans IDE. I wanted to show it to my friends, so I built it into a .jar. As per the readme that Net beans generates, I attempted to run the .jar with

java -jar"gameTest.jar"

但是我收到错误消息:无法加载Main-Class清单属性".

However I get the error: "Failed to load Main-Class manifest attribute".

现在不仅这个jar无法运行，而且我以前没有问题地运行过的其他jar都以相同的方式失败了.例如，我有Minecraft，运行的是.jar发行版，因此我可以通过.bat文件为HD纹理分配更多的内存.但是当我打开它时，它也会产生同样的错误.而且我知道这没什么问题.

And now not only will this jar not run, others that I have previously run without issue are failing in the same way. Fir example I have Minecraft, running off the .jar distribution so I can give it more memory trough a .bat file for HD textures. But it also generates this same error when I open it. And I know that there is nothing wrong with it.

我在网上找到的有关此错误的所有信息都表明清单存在问题，但是对于计算机上的所有.jar文件(尤其是那些我已经在其中多次使用的文件)而言，这可能不是正确的.过去没有问题.操作系统或Java安装中肯定有错误.

All the things I have found online about this error say that there is a problem with the manifest, however this can not be true for all the .jar files on my computer, especially those that I have already used multiple times in the past without issue. There must be something in the OS or java instalation that is wrong.

Win7 x64Java 6 x32JRE 6

Win7 x64 Java 6 x32 JRE 6

推荐答案

由于某种原因，重新安装JRE和JDK(按此顺序)似乎已解决了该问题.

It seems that, for whatever reason, re-installing both JRE and JDK (in that order) has fixed the problem.

不知道原因.

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