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How to Create a Countdown Timer in Java 

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by vigneshchennai74 dot icon Updated: Jan 31, 2023

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The Java Standard Library's java.util package is made up of classes and interfaces that offer practical functionality for a range of activities, including handling date and time, manipulating data, and more. Timer and Timertask are two frequently used classes and interfaces in the java.util package.  


Here are a few Java applications of countdown clocks that demonstrate their various uses:  

  • The creation of video games: Countdown timers can be used to add time restrictions to games, such as a deadline for finishing a level or a time limit for using a power-up.  
  • Taking tests: Time limitations for taking tests or quizzes can be set using countdown clocks.  
  • Alarm clock: A countdown timer application can be used as an alarm clock.  
  • Reminder: Users can be reminded of forthcoming events or tasks by using countdown clocks.  
  • Performance measurement: Countdown timers can be used to measure a program's performance by keeping track of how long it takes to complete a certain task. And more  


Here is how you can implement a countdown timer in Java:  

preview of the output that you will get on running this code from your own IDE

Code

In this solution we have used java.util library.

How to make a countdown CountDown Timer in java ( stopwatch Java )

JavadotLines of Code : 39dotLicense : Strong Copyleft (CC BY-SA 4.0)

Dependent Libraries : 
package com.test;

import java.util.Scanner;
import java.util.Timer;
import java.util.TimerTask;

public class StopWatch 
{
    public static int interval;

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.print("Input seconds => : ");
        interval = input.nextInt();
        int delay = 1000;
        int period = 1000;
        final Timer time = new Timer();
        System.out.println(interval);
        time.scheduleAtFixedRate(new TimerTask() {

            public void run() {
                if (interval == 0) {
                    System.out.println("work finished");
                    time.cancel();
                    time.purge();
                } else {
                    System.out.println(setInterval());
                }
            }
        }, delay, period);
    }

    private static int setInterval() {

        return --interval;
    }

}
  1. Copy this code using "Copy" button above paste it in your Java IDE
  2. Add the Java util Library to run this code.
  3. Run the code and enter the countdown.


I hope you found this useful i have added the dependent libraries , versions information in the following sections


i found this code snippet using "Countdown Timer in Java " in Kandi. You can try any Use case

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions


  1. The solution is created and executed in "1.8.0_251"
  2. This solution is tested on Java.util version "1.9.2"


Using this solution, we are able to countdown Timer in Java.util Library in java with simple steps. This process also facilities an easy to use, hassle free method to create a hands-on working version of code which would help us countdown timer in java.

Dependent Library

java-utilby jdereg

Java doticonstar image 347 doticonVersion:Currentdoticon
License: Permissive (Apache-2.0)

Rarely available and hard-to-write Java utilities, written correctly, and thoroughly tested

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            java-utilby jdereg

            Java doticon star image 347 doticonVersion:Currentdoticon License: Permissive (Apache-2.0)

            Rarely available and hard-to-write Java utilities, written correctly, and thoroughly tested
            Support
              Quality
                Security
                  License
                    Reuse

                      If you do not have Java.util that is required to run this code, you can install it by clicking on the above link and copying the pip Install command from the Java.Util page in kandi.

                      You can search for any dependent library on kandi like Java.util

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