Java 에러 - Could not find or load main class 해결 방법
"Could not find or load main class ..." 이 오류 메시지와 함께 프로그램이 실행되지 않을 때
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시스템 변수에서 CLASSPATH의 값을 %JAVA_HOME%; 로 변경해 줍니다.
If you're getting this error and you are using Maven to build your Jars, then there is a good chance that you simply do not have your Java classes in src/main/java/.
In my case I created my project in Eclipse which defaults to src (rather than src/main/java/.
So I ended up with something like mypackage.morepackage.myclass and a directory structure looking like src/mypackage/morepackage/myclass, which inherently has nothing wrong. But when you run mvn clean install it will look for src/main/java/mypackage/morepackage/myclass. It will not find the class but it won't error either. So it will successfully build and you when you run your outputted Jar the result is: