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Do classes you import in java have to be saved already in separate files?

I have to write an extension code and am confused. Here's what I have:

import info.gridworld.actor.Bug
public class ZBug extends Bug

With the rest my code below that. I keep getting an error message saying that "the import info cannot be resolved" I'm not sure what I'm doing wrong

You are missing a semicolon at the very least:

import info.gridworld.actor.Bug;

Then, you may miss some of the dependencies. Make sure that the info.gridworld.actor.Bug class or the JAR which contains it is in the project's build path.

If it is a Maven project, make sure to include the required <dependency> .

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