无法通过jar文件启动我的第一个Java程序

Question

I just made my first Java program and it worked perfectly, when I launched it by 'IDEA'. Then I wanted to create an executable file to launch it separately. 'IDEA' helped me create a jar file with this content inside it:

1. Some classes (*.class files).

2. Folder META-INF with MANIFEST.MF in it. MANIFEST.MF has only 2 lines: version info and "Main-Class: ru.nikolski.2048.main".

When I double click on the jar file, nothing happens. When I launch the jar file by 'IDEA', it writes the following:

"C:\Program Files\Java\jdk1.7.0_51\bin\java" -Dfile.encoding=windows-1251 -jar C:\Users\Osn\IdeaProjects\Game2048\out\artifacts\Game2048_jar\Game2048.jar

Error: Could not find or load main class ru.nikolski.2048.main

I tried to make folder ru/nikolski/2048 inside the jar file, and put all *.class files in it, but it didnt help, I got the same error.

What am I doing wrong?

Answer 1

I solved the problem just correcting the line in MANIFEST.MF:

Main-Class: Main

as my class with main method has the name 'Main'.