在Eclipse中测试时，Eclipse Java窗口打开，但在导出时则不打开

Question

So I have a Java window in Eclipse, and it has no errors or warnings. Here is that:

It launches just fine when I run it in Eclipse, and I've exported programs before like this, but when I export it to a JAR file and run it, it loads for a split second and then no window appears (the application doesn't show up in the task manager either). Here's my settings for the build:

It builds just fine, but when clicked, it doesn't open the window! What am I doing wrong here?

Answer 1

这只是一个猜测，但是您可能需要在启动时使用以下标志：-XstartOnFirstThread

Answer 2

According to the picture you added, you are not exporting your project as a runnable JAR file. A runnable JAR includes the MANIFEST.MF, which defines the Main class to be executed when you run the JAR.

Right Click on project -> Export -> Java -> Runnable JAR file, on the next screen select your Main class and define export destination and check "Extract required libraries into generated JAR.