[ajug-members] threads

[Jeremy Haile]

Implementing Runnable is preferred, since it is more flexible:
1) Allows your class to extend other superclasses
2) Allows it to be reused with different implementations of the Thread  
class without changing your implementation
3) Allows it to be used with schedulers, etc. such as the Java 5+  
executors: http://java.sun.com/j2se/1.5.0/docs/api/java/util/concurrent/Executor.html

Also, think about it from an object oriented design class.  Superclass  
relationships are an "is-a" relationship.  When you create a class,  
ask the question "is it a Thread?"  I doubt that you are actually  
creating something that "is-a" thread.  Instead you are creating  
something that can be executed by a thread.  Therefore Runnable is  
more appropriate in almost all cases.

On May 2, 2008, at 9:38 PM, mcdaniel wrote:

> can anyone please answer my question?
>
> barclay
>
>>>>>
>
> 5/1/2008; barclay wrote:
>>
>> why would one ever "extend Thread" vs. "implementing Runnable"? -are
>> there speed gains/losses?
>>
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