Discussion
Sample04 is run - what will be the output?
public class Sample04
{
public static void main(String[] args)
{
Thread t = new Thread(() -> System.out.println("work"));
t.start();
t.setDaemon(true);
}
}
Answer: D
setDaemon must be called before the thread is started and throws IllegalThreadStateException if the thread is alive. The worker has already been started, so it runs and prints while main fails on the next line. The two threads are independent, so both effects occur.
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