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Error: Could not find or load main class Caused by: java.lang.ClassNotFoundException: [message #1839420]

Sat, 20 March 2021 18:46

Matteo Franceschi

Messages: 1
Registered: March 2021

Junior Member

After the update with java 16 and the new version of Eclipse 2021 03,
all my project (even a new one) of Java or Spring Boot are not working anymore.

All I have as errore is:

Error: Could not find or load main class
Caused by: java.lang.ClassNotFoundException:

I tryed to rebuild, clean, use maven (not working anymore), delete all the library...
Nothing is working.

Someone can help me with this problem, please?

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Re: Error: Could not find or load main class Caused by: java.lang.ClassNotFoundException: [message #1839465 is a reply to message #1839420]

Mon, 22 March 2021 08:58

Sarika Sinha

Messages: 130
Registered: February 2010
Location: Bangalore, India

Senior Member

So you have installed Java 16 support from marketplace entry https://marketplace.eclipse.org/content/java-16-support-eclipse-2021-03-419 ?
Which Java version you were using before? Are you using modules ?

Sarika Sinha
JDT Programmer

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