checking if variable is blank after 20 seconds

Code:

---

public class Test {
    public static void main(String[] args) {
        long startTime = System.nanoTime();
       
        String blah = "";

        while(true) {
            System.out.println("testing");
            if (System.nanoTime() - startTime > 20000)
                break;
        }
    } 
}

---

i want to somehow check if blah.equals("") after 20 seconds, can anyone help me?

Code:

---

        public static void main(String[] args)
        {
                String blah = "";
                Thread th = new Thread(new Runnable()
                {
                        @Override
                        public void run()
                        {
                                try
                                {
                                        Thread.sleep(20000);
                                }
                                catch (InterruptedException e)
                                {
                                }
                        }
                });
                th.start();

        }

---

Of course it won't make any sense to do that for a local variable

Thanks ComputerJy, but where would i check to see if blah still is "" after 20 seconds? after the Thread.sleep line?

exactly