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Java™
by example!
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When should I use Runnable over extending the Thread class?
Java does not support multiple inheritance. If your class already extends from a superclass and want to make it threadable, you will have to use the Runnable interface. In general, it's good OO practice if you implement Runnable thereby saying your class is a generic Thread, instead of extending it saying "it's kindof a thread but i want to modify some of the Thread class behavior". Also, you typically don't know what's ahead in your project. If you extend from Thread and your design changes in such a way that you have to extend from another class, you'll have to do some extra work.
In this example, class A extends from Thread, and class B implements Runnable.
Main.java:
Further Information
Author of answer: Joris Van den Bogaert
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