How to count vowels and consonants and capitalizing first letter in a string while output using a method and return result

Question

If a user enters a string: hello there

it should output

Hello has 2 vowels
There has 3 consonants.

I know this is a f

Answer 1

Here is the simple code for counting the number of vowels using recursion

 public static int vowels(String s){
        int count =0;
        char c;
        if(s.length()==0){
            return 0;
        }
        else{
            c =s.charAt(0);
            if(c=='a'||c=='e'||c=='i'||c=='o'||c=='u'){
                count++;
            }
            return count+vowels(s.substring(1));


        }
    }

Answer 2

This looks way simple than above answers. It gets the input, converts it to lowercase then to an array of characters. A simple for loop will do the trick onwards.

import java.util.*;

public class FindVowelsConsonents {

  public static void main(String[] args) {
    int vowels_count = 0;
    int consonents_count = 0;
    Scanner sc = new Scanner(System.in);
    String str = sc.nextLine();
    String str2 = str.toLowerCase();
    char[] chr = str2.toCharArray();

    for(int i=0;i<chr.length;i++){
        if(chr[i] == 'a' || chr[i]== 'e' || chr[i] == 'i' || 
                              chr[i] == 'o' || chr[i] == 'u')
            vowels_count++;
        else
            consonents_count++;
    }

    System.out.println(vowels_count+ " "+consonents_count); 
    sc.close();
   }
}

Answer 3

import java.util.Scanner;

//don't use space in between the input string;

 class StrRev {

    static String Vowels ="aeiouAEIOU";

    public static void main(String[] args){
         @SuppressWarnings("resource")
        Scanner name = new Scanner(System.in);
         String nm = name.nextLine();

         System.out.println();
         int vowel=0;
         int consonant=0;
        for(int i=0;i<nm.length();i++){
            for(int j=0;j<Vowels.length();j++){
                if(Vowels.charAt(j)==nm.charAt(i)){
                    vowel++;
                    break;
                }
            }
        }
        consonant = nm.length()-vowel;
        System.out.println("no of Vowels :"+vowel+"\nno of consonant :"+consonant);
     }

}

Answer 4

I suggest you;

• to create a final vowels array,
• define a bool isVowel(char c) function and use it in your if condition.

Answer 5

following code will give you vowel and Constonent count

static String VOWEL_GROUP = "AEIOUaeiou";
static String testString = "AAAASHMAIOUAXCCDIOUGGGGA"; // say this is your text

public static void main(String[] args) {
    int vovelCount = 0;
     int consonantCount = 0;
    for (int j = testString.length() - 1; j >= 0; j--) {//outer loop 
        for (int i = 0; i < VOWEL_GROUP.length(); i++) { //inner loop
            if (VOWEL_GROUP.charAt(i) == testString.charAt(j)) {
                vovelCount++; //vowel count in text
                break;
            }else{
                consonantCount ++;
            }
        }
    }
    System.out.println(vovelCount+" "+ consonantCount);
}

Answer 6

As far as I am concerned you can use StringTokenizer:

    String text = "dupalo twoja mama";
    StringTokenizer tokenizer = new StringTokenizer(text,"aeiuo",false);
    int vowels = tokenizer.countTokens();
    System.out.println(vowels);

In this case of "text" it will print out 7.