找不到主类，程序会退出 [英] Could not find the main class, program will exit

问题描述

我使用

jar cvfm MyJarName.jar manifest.txt *.class

创建了.jar文件。但当我尝试打开它时，我会弹出一个窗口，上面写着

which created the .jar file. But when I attempt to open it, I get a pop-up window that says

Could not find the main class: <ClassName>. Program will exit.

然而，当我使用

java -jar jarName.jar

在命令提示符下，它有效精细。这是怎么回事？我希望能够双击它。

in the command prompt, it works fine. What's the deal? I want to be able to just double-click it.

推荐答案

哈，我发现了问题所在。我使用jdk1.7制作了我的程序，但是我安装了jre6。我去了升级到jre7，现在工作正常：）

Ha, I found what the problem was. I made my program using jdk1.7, but I had jre6 installed. I went and upgraded to jre7, and now it works fine :)

java -jar jarname.jar

行在命令提示符下工作，因为我的java路径被设置为jdk文件夹。

line was working in the command prompt because my java path was set to the jdk folder.

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