Java Program to Count and find the Vowels in a String?

There are following way to Count and find the Vowels in a String.

  • First we convert given input string in lower case from toLowerCase() method.
  • Now create a List in character type
  • Add the vowels in that List.
  • Now given input String in a character type from chars() method and convert this character as object type from mapToObj()
  • Inside filter we check which character is vowel from contains ()
  • For count total number of Vowels, we are using count()
  • Now Print the Character.
				
					import java.util.Arrays;
import java.util.List;

public class VowelCount {
	public static void main(String[] args) {
		String str = "welcome to java";
		String lowerCase = str.toLowerCase();
		List<Character> list = Arrays.asList('a', 'e', 'i', 'o', 'u');
		
		System.out.println("Vowel character is :- ");
		lowerCase.chars().mapToObj(c -> (char) c).filter(list::contains).forEach(System.out::println);
		
		long VowelCount = lowerCase.chars().mapToObj(c -> (char) c).filter(list::contains).count();
		System.out.println("Total number of Vowel is:- " + VowelCount);
	}
}

Output :-
Vowel character is :-
e
o
e
o
a
a
Total number of Vowel is:- 6

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