Is it good practice to have a main class with only the main method in Java, or should I organize my project better?

[tobiager]

Body

I'm learning Java at university and have questions about the structure of my projects.
So far, I've done everything in the same class with the public static void main(String[] args), but it's starting to look messy.
What are some recommended best practices for better organizing the code?
Thanks!

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