Question

write a program in java to accept a string from the user and print the number of uppercase, lowercase and digits present in the string​

Answer 1

import java.util.Scanner;

public class StringContents {

  public static void main(String[ ] args) {

       System.out.print("Enter a string - ");

       String sentence = new Scanner(System.in).nextLine( );

       int countUpper = 0,

            countLower = 0,

            countDigit = 0;

       for (char character : sentence.toCharArray( )) {

           if (Character.isLetter(character))

              if (Character.isUpperCase(character)) countUpper++;

              else countLower++;

           else if (Character.isDigit(character)) countDigit++;

       }

       System.out.printf("Lowercase characters - %d\n" +

                         "Uppercase characters - %d\n" +

                         "Digits - %d", countLower, countUpper, countDigit);

   }

}