Countdown

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We're all for peace and fighting terrorism, but we'll write a countdown program just the same. Our program should count from 30 to 0 and then end with a "Boom!". Don't worry. The "Boom!" will be peaceful, silent text. The program should advance the countdown 10 times per second. To add a delay to the program, use Thread.sleep(100);

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Karas Java Developer

7 September 2020, 23:05

Check this out: https://docs.oracle.com/javase/tutorial/essential/concurrency/sleep.html

David Haines

Level 13 , La Crosse, United States

22 July 2020, 20:17

I found this and it compiled and verified successfully: public static void main(String[] args) throws Throwable

Edddieg

Level 15 , Providence, United States

25 June 2020, 02:00

this code is scary

Peter Karanyi

Level 9 , Cowplain, United Kingdom

12 June 2020, 10:56

You have to add "throws InterruptedException" otherwise it won't compile!

Janusz

Level 11 , Radomsko, Poland

5 January 2019, 14:25

com/codegym/task/task07/task0723/Solution.java:15: error: unreported exception java.lang.InterruptedException; must be caught or declared to be thrown Thread.sleep(100); ^ com/codegym/task/task07/task0723/Solution.java:17: error: unreported exception java.lang.InterruptedException; must be caught or declared to be thrown Thread.sleep(100); ^ What is wrong public class Solution { public static void main(String[] args) throws IOException { for (int i = 30; i >= 0; i--) { System.out.println(i); Thread.sleep(100); } Thread.sleep(100); System.out.println("Boom!"); } }

Roman

Level 41

8 January 2019, 06:33

If you need help, something isn't right in your code, the server won't accept your solution (even if you are 100% sure that it is correct). Describe your question/issue in the HELP section at codegym.cc/help.

horst

Level 26 , Not in list

8 January 2020, 00:30

I am not an expert on exceptions, but I think your main method should throw an Interrupted Exception instead of an IO:

public static void main(String[] args) throws InterruptedException

By the way, could the CodeGym-team please fix this? I think exceptions are explained later than this task.

Arko Sarkar

Level 8 , Mumbai, India

1 September 2018, 05:48

What is Thread.sleep(100) and how does it advance the countdown ten times per second?

Roman

Level 41

3 September 2018, 05:48

Thread.sleep(100) allows to make pause in 1/10 second.