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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”.

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Chapter 30 Solutions

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