[Edit]

Java - iterate through string

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Created by:

Burhan-Boyce

458

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

Quick solution:

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

1. Using for loop with String `charAt()`

Edit

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

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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:

xxxxxxxxxx
 
ABC

2. Using String `toCharArray()`

Edit

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.

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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:

xxxxxxxxxx
 
ABC

3. Using String `split()`

Edit

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.

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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:

xxxxxxxxxx
 
ABC

4. Using Iterator

Edit

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

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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();
        }
    }
}