Reverse String algorithm

ReverseString.java

import javax.swing.JOptionPane;

public class ReverseString {

  public static String reverse(String s) {
		int length = s.length(), last = length - 1;
		char[] chars = s.toCharArray();
		for (int i = 0; i < length / 2; i++) {
			char c = chars[i];
			chars[i] = chars[last - i];
			chars[last - i] = c;
		}
		return new String(chars);
	}

	public static void main(String[] args) {

		String reverseInput = JOptionPane.showInputDialog("Type to reverse");
		String w = reverse(reverseInput);
		System.out.println(w);
	}
}