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