What is wrong here?
package pl.codegym.task.task16.task1617;
/*
Odliczanie na wyścigach
*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
public class Solution {
public static volatile int numSeconds = 4;
public static void main(String[] args) throws InterruptedException {
RacingClock clock = new RacingClock();
Thread t = new Thread(clock);
t.start();
t.sleep(3500);
clock.interrupt();
}
public static class RacingClock extends Thread {
public RacingClock() {
start();
}
public void run() {
Thread current = Thread.currentThread();
try {
while (!current.isInterrupted()) {
if (numSeconds > 0) {
System.out.println(numSeconds);
current.sleep(1000);
--numSeconds;
}
else if (numSeconds == 0){
System.out.println("Start");
return;
}
}
}
catch (InterruptedException e){
System.out.println("Przerwane");
return;
}
return;
}
}
}