Discussion
Sample53 is run - what will be the output?
import java.util.concurrent.*;
public class Sample53
{
public static void main(String[] args) throws Exception
{
ExecutorService pool = Executors.newSingleThreadExecutor();
pool.submit(() ->
{
try { Thread.sleep(5000); }
catch (InterruptedException e) { System.out.println("stopped early"); }
});
Thread.sleep(100);
pool.shutdownNow();
}
}
Answer: A
shutdownNow interrupts the threads running the current tasks as well as refusing new ones, and a task asleep at the time receives InterruptedException. Plain shutdown would only stop new submissions and let the sleep finish.
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