Re: Query:difference between different mothod to create a thread!

Knute Johnson <>
Fri, 04 May 2007 11:49:51 -0700
Jack Dowson wrote:

Hello Everybody:
As we all know there are two ways to create a thread,one is by
inheriting class Thread another is by implementing interface Runnable.
An instance created by class Thread can not be reused while the one
created by interface Runnable could.Why?I think it has nothing to do
with java's single inherit or multi interface implement.If it really
does,how does this rule work then?

Any help will be greatly appreciated!

From the docs

public void start()

    Causes this thread to begin execution; the Java Virtual Machine
calls the run method of this thread.

    The result is that two threads are running concurrently: the current
thread (which returns from the call to the start method) and the other
thread (which executes its run method).

    It is never legal to start a thread more than once. In particular, a
thread may not be restarted once it has completed execution.

        IllegalThreadStateException - if the thread was already started.
    See Also:
        run(), stop()


Knute Johnson
email s/nospam/knute/

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