From the Java API Specification for the Thread.start
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.
Furthermore:
Throws:
IllegalThreadStateException
– if the thread was already started.
So yes, a Thread
can only be started once.
If so than what do I do if I want to
run the thread again?
If a Thread
needs to be run more than once, then one should make an new instance of the Thread
and call start
on it.