Threads - Finding the output Questions and Answers

Sample01 is run - what will be the output?

public class Sample01
{
    public static void main(String[] args)
    {
        Thread t = new Thread(() -> System.out.println(
                Thread.currentThread().getName()));
        t.run();
    }
}

Sample02 is run - what will be the output?

public class Sample02
{
    public static void main(String[] args) throws InterruptedException
    {
        Thread t = new Thread(() -> System.out.println("worker"));
        t.start();
        t.join();
        System.out.println("main");
    }
}

Sample03 is run - what will be the output?

public class Sample03 extends Thread
{
    public void run()
    {
        System.out.println("cycle");
    }

    public static void main(String[] args) throws InterruptedException
    {
        Sample03 job = new Sample03();
        job.start();
        job.join();
        job.start();
    }
}

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);
    }
}

Sample05 is run - what will be the output?

public class Sample05
{
    public static void main(String[] args)
    {
        Object lock = new Object();
        synchronized (lock)
        {
            System.out.println("in");
        }
        lock.notify();
    }
}

Sample06 is run - what will be the output?

public class Sample06
{
    static final Runnable NOTHING = new Runnable()
    {
        public void run() { }
    };

    public static void main(String[] args) throws InterruptedException
    {
        Thread probe = new Thread(NOTHING);
        System.out.print(probe.getState());
        probe.start();
        probe.join();
        System.out.print(" " + probe.getState());
    }
}

Sample07 is run - what will be the output?

public class Sample07 extends Thread
{
    public void run() { }

    public static void main(String[] args) throws InterruptedException
    {
        Sample07 job = new Sample07();
        boolean before = job.isAlive();
        job.start();
        job.join();
        System.out.println(before + " " + job.isAlive());
    }
}

Sample08 is run - what will be the output?

public class Sample08
{
    public static void main(String[] args)
    {
        Thread.currentThread().interrupt();
        System.out.print(Thread.interrupted() + " ");
        System.out.print(Thread.interrupted());
    }
}

Sample09 is run - what will be the output?

public class Sample09
{
    static void report()
    {
        System.out.print(Thread.currentThread().isInterrupted() + " ");
    }

    public static void main(String[] args)
    {
        Thread.currentThread().interrupt();
        report();
        report();
    }
}

Sample10 is run - what will be the output?

public class Sample10
{
    public static void main(String[] args)
    {
        Thread.currentThread().interrupt();
        try
        {
            Thread.sleep(1000);
            System.out.println("slept");
        }
        catch (InterruptedException e)
        {
            System.out.println("caught " + Thread.currentThread().isInterrupted());
        }
    }
}