How do I reverse a string using CharacterIterator?

In this example we use the java.text.CharacterIterator implementation class java.text.StringCharacterIterator to reverse a string. It’s done by reading a string from the last index up to the beginning of the string.

package org.kodejava.example.text;

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

public class StringCharacterIteratorReverseExample {
    private static final String text = "Jackdaws love my big sphinx of quartz";

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

        System.out.println("Before = " + text);
        System.out.print("After  = ");
        // Iterates a string from the last index to the beginning.
        for (char ch = it.last(); ch != CharacterIterator.DONE; ch = it.previous()) {
            System.out.print(ch);
        }
    }
}

The result of the code snippet above:

Before = Jackdaws love my big sphinx of quartz
After  = ztrauq fo xnihps gib ym evol swadkcaJ

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. You can support my works by donating here. Thank you.

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