Question

How to count uppercase, lowercase, special characters, and numeric values using RegEx in Scala

Answer 1

import scala.util.matching.Regex

object CountCharacters {

  private def countMatches(text: String, pattern: String): Int = {
    new Regex(pattern).findAllIn(text).length
  }

  def countCharacters(text: String): (Int, Int, Int, Int) = {
    val uppercase = countMatches(text, "[A-Z]")
    val lowercase = countMatches(text, "[a-z]")
    val digits    = countMatches(text, "\\d")
    val special   = countMatches(text, "[^A-Za-z0-9]")

    (uppercase, lowercase, digits, special)
  }

  def main(args: Array[String]): Unit = {
    val s = "Programming&AI@2026!"

    val (u, l, d, spc) = countCharacters(s)

    println(s"Uppercase: $u")
    println(s"Lowercase: $l")
    println(s"Digits: $d")
    println(s"Special characters: $spc")
  }
}

  
  
  
/*
run:
  
Uppercase: 3
Lowercase: 10
Digits: 4
Special characters: 3
  
*/

 

 

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