Study Java: Use Timer to create something like a bomb timer

I suddenly remembered Google's 15-minute rule I tried to see if it can be described as a timer in java

I haven't come up with the refreshing introduction to Java that I'm currently reading, so I'd like to see the API or refer to Qiita. It's been about 2 weeks since I started learning java, so I tried splitting the code

`Main`



import java.util.*;

public class Main {
    static Scanner inp = new Scanner(System.in);
    public static void main(String[] args) {
        try {
            System.out.print("Let's set up a bomb timer(sec): ");
            int sec = inp.nextInt();
            BombTimer.Bomb(sec);
        } catch (InputMismatchException e) {
            System.out.println("The input is incorrect.");
        } finally {
            inp.close();
        }
    }
}

`BombTimer`



import java.util.*;

public class BombTimer {
    public static void Bomb(int sec) {
            System.out.println("Until the explosion" + sec + "Seconds");
            Timer timer = new Timer();
            TimerTask task = new TimerTask() {
                int secCount = sec - 1;
                @Override 
                public void run() {
                    if (secCount > 0) {
                        if (secCount <= 60 && secCount % 10 == 0) {
                            System.out.println("remaining" + secCount + "Seconds");
                        } else if (secCount == 5) {
                            System.out.println(secCount + "Seconds ago");
                        } else {
                            System.out.println(sec);
                        }

                    } else {
                        System.out.println("Doka --------");
                        System.exit(0);
                    }
                    secCount --;
                }
            };
            timer.sucheduleAtFixedRate(task, 1000, 1000);
        }
}

The execution result is as follows

`result`


Set up a bomb timer(sec): 13
13 seconds left until the explosion
12
11
10 seconds left
9
8
7
6
5 seconds ago
4
3
2
1
Doka --------!

What I learned this time -@Override is a description --Scanner close () --You can understand how to use it by looking at the API reference.

System.exit(0)

I used it as a reference

[Java] Timer processing implementation method

Summary

I've figured it out, but I still don't know the correct answer. Should it be an if statement or a switch statement? Is exception handling mandatory? I have no end to my doubts. .. ..

Please do not hesitate to point out any points you notice.