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import java.util.Timer;
import java.util.TimerTask;
public class Countdown {
public static void main(final String args[]) {
if (args.length != 1) {
System.err.println("Usage: java Countdown <time in secs>");
System.exit(1);
}
final Timer timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask() {
int i = Integer.parseInt(args[0]);
public void run() {
System.out.println(i--);
if (i< 0)
timer.cancel();
}
}, 0, 1000);
}
}
C:\javaExample\util>javac Countdown.java
C:\javaExample\util>java Countdown 3
3
2
1
0
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