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

string result = new StringBuffer(yourString).reverse().toString();

Depending on what you understand under O(1) it does not seem possible since even reading the string once needs O(n) with n being the number of characters in the string.