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// Test interrupt() behaviour on a thread in wait(), sleep(), and spinning
// in a loop.
// Origin: Bryce McKinlay <bryce@albatross.co.nz>
class Waiter extends Thread
{
public synchronized void run()
{
System.out.println ("wait()");
try
{
wait();
System.out.println("Error: wait() completed normally.");
}
catch (InterruptedException x)
{
if (isInterrupted() || interrupted())
System.out.println("Error: interrupt flag is still set.");
}
System.out.println("interrupted - ok");
}
}
class Sleeper extends Thread
{
public void run()
{
System.out.println ("sleep()");
try
{
sleep(2000);
System.out.println("Error: sleep() completed normally.");
}
catch (InterruptedException x)
{
if (isInterrupted() || interrupted())
System.out.println("Error: interrupt flag is still set.");
System.out.println("interrupted - ok");
}
}
}
class Looper extends Thread
{
public void run()
{
System.out.println ("Busy waiting");
int count = 0;
for (int i=0; i < 1000000; i++)
{
Thread.yield();
count += 5;
if (isInterrupted ())
break;
}
synchronized (this)
{
if (interrupted ())
{
System.out.println ("interrupted - ok");
if (isInterrupted () || interrupted ())
System.out.println("Error: interrupt flag is still set.");
}
else
System.out.println ("Error: Busy wait was not interrupted.");
}
}
}
class Joiner extends Thread
{
public void run()
{
System.out.println("join()");
try
{
join(2000);
System.out.println("Error: join() completed normally??!");
}
catch (InterruptedException x)
{
if (isInterrupted() || interrupted())
System.out.println("Error: interrupt flag is still set.");
System.out.println("interrupted - ok");
}
}
}
public class Thread_Interrupt
{
public static void main(String args[])
{
Waiter w = new Waiter();
w.start ();
sleep_and_interrupt (w);
Sleeper s = new Sleeper();
s.start ();
sleep_and_interrupt (s);
Looper l = new Looper ();
l.start ();
sleep_and_interrupt (l);
Joiner j = new Joiner ();
j.start ();
sleep_and_interrupt (j);
}
public static void sleep_and_interrupt(Thread t)
{
try
{
Thread.sleep (250);
t.interrupt ();
long t1 = System.currentTimeMillis();
t.join (5000);
long time = System.currentTimeMillis() - t1;
if (time > 2900)
{
System.out.println ("Error: join() from main thread timed out");
}
}
catch (InterruptedException x)
{
System.out.println("Error: main thread interrupted.");
}
}
}
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