Java - iterate through string

In this article, we would like to show you how to iterate through string in Java.

Quick solution:

String text = "ABC";

for (int i = 0; i < text.length(); i++) {
    System.out.print(text.charAt(i));
}

1. Using for loop with String charAt()

In this example, we iterate through the text string and print each character.

public class Example {

    public static void main(String[] args) throws Exception {
        String text = "ABC";

        for (int i = 0; i < text.length(); i++) {
            System.out.print(text.charAt(i));
        }
    }
}

Output:

ABC

2. Using String toCharArray()

In this example,  we use String toCharArray() method to convert text String to the characters array. Then we use enhanced for-loop to iterate through the array.

public class Example {

    public static void main(String[] args) throws Exception {
        String text = "ABC";

        char[] characters = text.toCharArray();

        for (char ch : characters) {
            System.out.print(ch);
        }
    }
}

Output:

ABC

3. Using String split()

In this example,  we use String split() method to convert text String to the letters array. Then we use enhanced for-loop to iterate through the array.

public class Example {

    public static void main(String[] args) throws Exception {
        String text = "ABC";

        String[] letters = text.split("");

        for (String letter : letters) {
            System.out.print(letter);
        }
    }
}

Output:

ABC

4. Using Iterator

In this example, we use StringCharacterIterator class to iterate through the text string.

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

public class Example {

    public static void main(String[] args) throws Exception {
        String text = "ABC";
        CharacterIterator iterator = new StringCharacterIterator(text);

        while (iterator.current() != CharacterIterator.DONE)
        {
            System.out.print(iterator.current());
            iterator.next();
        }
    }
}

Output:

ABC