Extracting characters from a string - Java Language Basics

Java examples for Language Basics:String

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Introduction

Uses the charAt method to count the number of vowels in a string entered by the user:

Demo Code

import java.util.Scanner;

public class CountVowels
{
     static Scanner sc = new Scanner(System.in);

     public static void main(String[] args){
           System.out.print("Enter a string: ");
           String s = sc.nextLine();

           int vowelCount = 0;

           for (int i = 0; i < s.length(); i++){
                char c = s.charAt(i);
                if ((c == 'A') || (c == 'a')
                       || (c == 'E') || (c == 'e')
                       || (c == 'I') || (c == 'i')
                       || (c == 'O') || (c == 'o')
                       || (c == 'U') || (c == 'u') )
                     vowelCount++;/*from w  w w.jav  a2s  . c  o  m*/
           }
           System.out.println("That string contains " + vowelCount + " vowels.");
      }
}

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