How do I iterate each characters of a string?

The following example show you how to iterate each characters in a string using the java.text.CharacterIterator and java.text.StringCharacterIterator to count the number of vowels and consonants in the string.

package org.kodejava.example.text;

import java.text.CharacterIterator;
import java.text.StringCharacterIterator;

public class StringCharacterIteratorExample {
    private static final String text =
        "The quick brown fox jumps over the lazy dog";

    public static void main(String[] args) {
        CharacterIterator it = new StringCharacterIterator(text);

        int vowels = 0;
        int consonants = 0;

        // Iterates character sets from the beginning to the last character
        for (char ch = it.first(); ch != CharacterIterator.DONE; ch = {
            if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u') {
                vowels = vowels + 1;
            } else if (ch != ' ') {
                consonants = consonants + 1;

        System.out.println("Number of vowels: " + vowels);
        System.out.println("Number of consonants: " + consonants);

Wayan Saryada

Founder at Kode Java Org
I am a programmer, a runner, a recreational diver, currently live in the island of Bali, Indonesia. Mostly programming in Java, Spring Framework, Hibernate / JPA. If these posts help, you can support me, buy me a cup of coffee or tea. Thank you 🥳

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