Chapter 30, Problem 30.17PE

Program Plan Intro

Count consonants and vowels

Program Plan:

• Import the necessary packages into program.
• Define the class named “Exercise30_17”.
  • Define the main method.
    • Using “if…else” condition, check the first argument. If the file name is incorrect then print appropriate error message.
    • Exit the system.
  • Assign the first argument value into variable “name_file”.
    • Assign the vowel set into variable using “HashSet<>” class.
    • Find the number of vowels and consonants using “Stream” class.
  • Define the method “toCharacterArray()” which takes array list as parameter.
    • Declare the character variable “ans” in type of character.
    • Using “for” loop, assign all list values into “ans[]”.
    • Return the value of “ans”.