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interrupt doesn't interrupt?

 
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I have the following small method in my code. spt is a thread. Why doesn't isInterrupted() always return true? It always prints "false".
Rebecca

public void stopSegment( ) {
if (segmentPlaying){
segmentTimer.stop( );
segmentLine.stop();
segmentLine.flush();
segmentLine.close();

spt.interrupt();
boolean interrupted = spt.isInterrupted();
spt = null;
System.out.println("Spt is interrupted is " + interrupted);

segmentPlaying = false;
}
}
 
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From the JavaDocs for Thread.interrupt():Is that Thread currently sleeping or waiting?
 
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