Reverse a string in Java, in O(1)?

Question

Is there any facility in the standard Java libraries that, given a CharSequence, produces the reverse in O(1) time?

I guess this is \"easy\" to implement, just wond

Answer 1

for (count = str.length()-1; count >= 0; count--) {
     tempStr = tempStr.concat(Character.toString(origStr.charAt(count)));
}