Cannot run .jar files

Question

I switched from Java JDK (and JRE) 7 to 6u45. For some reason, I can not run .jar files anymore. I changed the default program to run the .jar files to the new JDK's javaw.exe - but it doesn't work. Moreover, I tried using the new JRE's javaw.exe too - it doesn't work. In both cases I'm getting this error:

"Could not find the main class: Program will exit. C:\Users\Michael\Desktop\myJar.jar"

http://stackoverflow.com/questions/7617807/could-not-find-the-main-class-program-will-exit — Nambi, May 27 '13 at 15:59
What error are you getting when you try to run the JAR from a command line using `java.exe`? — millimoose, May 27 '13 at 16:01
I get no error when using the command prompt. I wrote it in Java 7, downgraded to Java 6, and reinstalled Eclipse and re-wrote it in Java 6. I don't know why the jar would't work. — None None, May 27 '13 at 18:39

score 1 · Accepted Answer · edited May 27 '13 at 16:26

1

Recompile it, with option -target 1.6, than you will be able to run on 6 too.

edited May 27 '13 at 16:26

Pshemo

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answered May 27 '13 at 16:01

score 1 · Answer 2 · answered May 27 '13 at 16:01

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Sounds like you are not running java with the -jar argument.

try:

java.exe -jar C:\Users\Michael\Desktop\myJar.jar

answered May 27 '13 at 16:01

arjunyg

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It works fine when using it in the command prompt, I just can't use it by clicking on the file itself. – None None May 27 '13 at 19:36

Cannot run .jar files

2 Answers2