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How to prompt users for input from Scala shell scripts alvin June 20, 2015 - 4:37pm

This is an excerpt from the Scala Cookbook, partially modified for the internet. This is Recipe 14.12, “How to prompt users for input from Scala shell scripts.”

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Problem

You want to prompt a user for input from a Scala shell script and read her responses.

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Solution

Use the readLine, print, printf, and Console.read* methods to read user input, as demonstrated in the following script. Comments in the script describe each method:

Table of Contents

  1. Problem
  2. Solution
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How to read interactive command-line input with Java

Java command-line FAQ: How do I read command line input from a Java application (interactively)?

Solution: As of Java 5 (and newer Java versions), the best way to solve this problem is to use the Java Scanner class. Before showing an example of how to use the Scanner class, here’s a short description of what it does from the Javadoc: