问题描述
我有一个 Java 项目，在 Eclipse 中运行它时运行良好.当我尝试将其导出到 "JAR 文件" 或 "Runnable JAR 文件" 时，会创建 .jar 文件，但是当我双击它以尝试运行程序它给了我一个错误，说
I have a java project that works perfectly fine when running it from within Eclipse. When I try to export it to either a "JAR file" or "Runnable JAR file" the .jar file is created, but when I double click on it to try to run the program it gives me an error that says
"Could not find the main class: package.MainClassName. Program will exit."
正如我提到的，我尝试导出到两个 JAR 选项，我指定了 main 方法所在的正确类，当我查看 .jar 文件中的实际文件时，一切似乎有序 - 清单看起来像:
As I mentioned, I tried exporting to both JAR options, I specified the correct class that the main method is in, and when I look through the actual files in the .jar file everything seems to be in order -- the manifest looks something like:
Manifest-Version: 1.0
Main-Class: package.MainClassName
(blank line)
并且位于 META-INF 文件夹中.有一个包含我的包名称的文件夹，其中包含所有 .class 文件，包括包含 main 方法的类.我使用的一些图像和文本文件也出现在 jar 文件中.
and is in the META-INF folder. There is a folder with my package name, which contains all the .class files, including the class that contains the main method. A few image and text files that I use also appear in the jar file.
实际的程序并不太复杂——它是一个使用 Swing 的简单贪吃蛇"游戏(加上从 Eclipse 内部运行时所有代码都可以运行).
The actual program isn't anything too complicated -- it's a simple "snake" game using Swing (plus the code all works when run from inside Eclipse).
任何想法是什么导致了这个错误以及我如何解决它?如果我还需要提供任何其他信息，请告诉我.
Any ideas what is causing this error and how I can fix it? Let me know if there's any other information I should provide.
推荐答案
好的，我终于让它工作了.如果我使用 JRE 6 而不是 7，一切都很好.不知道为什么，但它有效.
Ok, so I finally got it to work. If I use the JRE 6 instead of 7 everything works great. No idea why, but it works.
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