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How can we make a plain (ordinary) Java class to be a reusable one?
Difference between Java Bean & Bean class
 
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Moved to Java In General (Beginner)
 
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How can we make a plain (ordinary) Java class to be a reusable one?


-- If you are referring to a java class being used as a 'utility class' or a class that can be called by other class within a project or package to perform some functions, i suggest that you declare those methods as public so that other classes may see them.

I hope this helps a bit.
 
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