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hasCode.com micha kops' playground


TERMINAL BASED PROGRESS BAR FOR JAVA APPLICATIONS

March 31st, 2019 by Micha Kops

Recently I needed to add a progress bar to a Java based terminal/console
application and I used a specific library that I’d like to demonstrate in the
following snippet.



Terminal based Progress Bar for Java


CONTENTS

 1. Dependencies
 2. Sample Application
 3. Running the Sample
 4. Tutorial Sources
 5. Resources

 


DEPENDENCIES

Using Maven, we just need to add the following dependency:

<dependency>
    <groupId>me.tongfei</groupId>
    <artifactId>progressbar</artifactId>
    <version>0.7.3</version>
</dependency>


SAMPLE APPLICATION

The application shows how to set up the progress bar and how to advance its
status by-one, by a given amount or to a specific number.

package com.hascode.tutorial;
 
import me.tongfei.progressbar.ProgressBar;
 
public class Sample {
 
  public static void main(String[] args) throws InterruptedException {
    System.out.println("\n");
    try (ProgressBar pb = new ProgressBar("Downloading the internet", 2000)) {
      pb.step();
      Thread.sleep(1_000);
      pb.step();
      Thread.sleep(1_000);
 
      pb.stepBy(248); // step by n
      Thread.sleep(1_000);
 
      pb.stepTo(600); // step directly to n
      Thread.sleep(1_000);
 
      pb.maxHint(2500);
      pb.stepTo(1337);
      pb.stepTo(2500);
      pb.setExtraMessage("Downloading..."); // Set extra message to display at the end of the bar
    }
    System.out.println("we have downloaded the internet ...");
  }
}


RUNNING THE SAMPLE

We may now run the sample application e.g. by using Maven like this:

mvn clean compile exec:java -Dexec.mainClass=com.hascode.tutorial.Sample
[..]
 
Downloading the internet 100% │██████████████████████████████████████████████████████████│ 2500/2500 (0:00:04 / 0:00:00) Downloading...
we have downloaded the internet ...
[..]

Depending on the visual style configured the output might look similar to this
one:

Progressbar in action


TUTORIAL SOURCES

Please feel free to download the tutorial sources from my Bitbucket repository,
fork it there or clone it using Git:

git clone https://bitbucket.org/hascode/java-terminal-progressbar-sample.git


RESOURCES

 * progressbar library on GitHub
 * Project Website

Tags: cli, console, progress-bar, terminal, tools
Posted in Java | 1 Comment »

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