Intellij “Could not find or load main class”

Question

I installed intellij and it keeps giving me error:

Could not find or load main class sample.Main

I checked many answers for similar questions and non of them worked. The program I'm trying to run:

package com.company;

public class Main {

    public static void main(String[] args) {
        System.out.printf("hello");
    }
}

Run Configuration

Settings

"out" folder is not getting created. Full run command used by intellij after expanding "..."

"C:\Program Files\Java\jdk1.8.0_181\bin\java.exe" "-javaagent:E:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.2.1\lib\idea_rt.jar=51072:E:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.2.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_181\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\rt.jar" com.company.Main

Did the com.company file and import appear there on its own? I don't think that's supposed to be there when running IntelliJ on a fresh install. — Howard P
Check the output directory has write permissions, check build.log for errors (intellij-support.jetbrains.com/hc/articles/207241085), see also stackoverflow.com/a/42660624/104891 answer. What's the output path you are masking out on your screenshots? — CrazyCoder
@HowardP I created sample command line application that comes with intellij. — Anthony J.

Anthony J. Anthony J. · Accepted Answer · 2018-08-18T07:17:46

Thanks to CrazyCoder, I could find the root of the problem. Intellij is using wrong iml file in "modules.xml" file. Change the iml value in modules.xml manually and rebuilding the project fixed the problem.

Of course this is just a work around. I think I have problem my intellij as it always using wrong iml file for all new projects.

Intellij “Could not find or load main class”

4 Answers