Main Class Jar Exception

Asked Jul 19 '22 at 18:07

Active Jul 19 '22 at 18:11

Viewed 41 times

I'm new to the java language. I am trying to understand what exactly the class loader of JVM does.

I wrote a simple java program and copied the .java file in the C:\Program Files\Java\jdk1.8.0_333\jre\lib\ext and tried to compile it. After that when the javac command created a .class file, I converted it into a jar file and deleted the .class file.

So when I tried to run the jar with java filename the output of cmd displayed like this:

Error: Could not find or load main class Testing_prog

Testing_prog is my converted jar file.

Please Help.

edited Jul 19 '22 at 18:11

Mr. Polywhirl

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asked Jul 19 '22 at 18:07

Mahdi

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Does this answer your question? [What does "Could not find or load main class" mean?](https://stackoverflow.com/questions/18093928/what-does-could-not-find-or-load-main-class-mean) – Martin Zeitler Jul 19 '22 at 18:09
Seems like your jar's manifest is missing the main class value. – Mr. Polywhirl Jul 19 '22 at 18:12
Please provide enough code so others can better understand or reproduce the problem. – Community Jul 19 '22 at 19:56

Main Class Jar Exception

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