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// Many threads join a single thread.
// Origin: Bryce McKinlay <bryce@albatross.co.nz>
class Sleeper implements Runnable
{
int num = -1;
public Sleeper(int num)
{
this.num = num;
}
public void run()
{
System.out.println("sleeping");
try
{
Thread.sleep(500);
}
catch (InterruptedException x)
{
System.out.println("sleep() interrupted");
}
System.out.println("done");
}
}
class Joiner implements Runnable
{
Thread join_target;
public Joiner(Thread t)
{
this.join_target = t;
}
public void run()
{
try
{
long start = System.currentTimeMillis();
join_target.join(2000);
if ((System.currentTimeMillis() - start) > 1900)
System.out.println("Error: Join timed out");
else
System.out.println("ok");
}
catch (InterruptedException x)
{
System.out.println("join() interrupted");
}
}
}
public class Thread_Join
{
public static void main(String[] args)
{
Thread primary = new Thread(new Sleeper(1));
primary.start();
for (int i=0; i < 10; i++)
{
Thread t = new Thread(new Joiner(primary));
t.start();
}
}
}
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