jodd-core/src/main/java/jodd/util/StringUtil.java
public static String reverse(final String s) {
		StringBuilder result = new StringBuilder(s.length());
		for (int i = s.length() -1; i >= 0; i--) {
			result.append(s.charAt(i));
		}
		return result.toString();
	}
public static String reverse(final String s) {
		StringBuilder result = new StringBuilder(s.length());
		for (int i = s.length() -1; i >= 0; i--) {
			result.append(s.charAt(i));
		}
		return result.toString();
	}
Reverse a string.