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question of threads from Dan's mock

Ana Abrantes
Ranch Hand

Joined: Sep 04, 2003
Posts: 43
This is a question on Dan's new mock:

As a result, it prints "A".
But I can't figure out why!
If I don't have the class MyThread and used Thread instead, the result would be "B".
Does the run() method of a subclass of Thread have priority over the run() of the runnable passed as target to it?
Ana


Ana<p>SCJP 1.4
Sachin Tendulkar
Greenhorn

Joined: Sep 20, 2003
Posts: 27
In the example given the run method is being over-ridden. The original run method in Thread calls the run method of the Runnable interface if the thread is passed a Runnable object.
In this case the over-riding method changes the behaviour of the run method. It simply prints "A" and never calls the run method of the Runnable interface.
As a result at run time the over-ridden run method is called and prints A.
Marlene Miller
Ranch Hand

Joined: Mar 05, 2003
Posts: 1391
Here is the run method of the Thread class.

If this method is overridden, target.run() will not be invoked. The run() method of the Runnable object will not be executed.
 
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