How can we determine time here?

Question about the task

Under discussion

1. Figure out what the program does.
2. Implement the run method so that each second
the count is displayed, separated by spaces and starting from numSeconds down to 1, and then "Go!" (see the examples).
3. If the thread runs for 3.5 seconds or more, interrupt it using the interrupt method and within the thread display "Interrupted!"

Example for numSeconds = 4 :
"4 3 2 1 Interrupted!"

4. If the thread runs less than 3.5 seconds, it should terminate itself.
Example for numSeconds = 3 :
"3 2 1 Go!"

PS: The sleep method throws an InterruptedException.

Requirements:

The RacingClock class's run method must have a loop.
The RacingClock object must decrease the numSeconds value by one every second.
The main method should call Thread.sleep(3500).
The main method must call the interrupt method on the Clock object.
If numSeconds is 3, then the program should display "3 2 1 Go!".
If numSeconds is 4, then the program should display "4 3 2 1 Interrupted!".

package com.codegym.task.task16.task1617; /* Countdown at the races 2. Implement the run method so that each second the count is displayed, separated by spaces and starting from numSeconds down to 1, and then "Go!" (see the examples). 3. If the thread runs for 3.5 seconds or more, interrupt it using the interrupt method and within the thread display "Interrupted!" Example for numSeconds = 4 : "4 3 2 1 Interrupted!" 4. If the thread runs less than 3.5 seconds, it should terminate itself. Example for numSeconds = 3 : "3 2 1 Go!" */ public class Solution { public static volatile int numSeconds = 3; public static void main(String[] args) throws InterruptedException { RacingClock clock = new RacingClock(); //write your code here } public static class RacingClock extends Thread { public RacingClock() { start(); } public void run() { //write your code here while(numSeconds >= 1) { System.out.print(numSeconds + " "); numSeconds -= 1; } if (isInterrupted()) { System.out.print("Interrupted!"); } else { System.out.print("Go!"); } } } }

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Learner

Level 16 , India

15 October 2018, 06:34

The answer to your question is given in the task example itself. Example for numSeconds = 4 : "4 3 2 1 Interrupted!" So, you have to check whether numSeconds = 4 or less than 4. If 4 or more than 4 then, print interrupted. If less than 4 then print Go.

Baljinder Singh

Level 20 , Toronto, Canada

15 October 2018, 15:59

I did it like this and it works, is it ok?

public class Solution {
    public static volatile int numSeconds = 4;

    public static void main(String[] args) throws InterruptedException {
        RacingClock clock = new RacingClock();
        if ((float)numSeconds > 3.5) {
            clock.interrupt();
        }
        Thread.sleep(3500);
    }

    public static class RacingClock extends Thread {
        public RacingClock() {
            start();
        }

        public void run() {
            try {
                while (numSeconds >= 1) {
                    Thread.sleep(1000);
                    System.out.print(numSeconds + " ");
                    numSeconds -= 1;
                }
                System.out.print("Go!");
            } catch (InterruptedException e) {
                while (numSeconds >= 1) {
                    System.out.print(numSeconds + " ");
                    numSeconds -= 1;
                }
                System.out.print("Interrupted!");
            }
        }
    }
}

Learner

Level 16 , India

16 October 2018, 05:25

Your code is throwing UnhandledException. Are you sure your code works?