Reverse a String and store it in the same variable in Java using String class methods -

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• reverse string in java 34 answers

suppose there string variable str = "a man no one!", need reverse of string stored in same str variable "!eno on si nam a", without using other object or variable. please provide optimized way this?

i used below piece of code:

public static string reverserecursively(string str) {         //base case handle 1 char string , empty string         if (str.length() < 2) {             return str;         }         return reverserecursively(str.substring(1)) + str.charat(0);     } 

any other way of doing this?

please note want using string class methods.

try this.

new stringbuilder(str).reverse().tostring() 

while create new stringbuilder instance, doesn't store in variable, , tricky (if possible) reverse string without new objects whatsoever.

edit

since don't want use string methods, here's simple way loop instead, again still creates new objects.

char[] chars = new char[str.length()]; (int = 0; < str.length(); i++) {     chars[str.length() - - 1] = str.charat(i); } string newstr = new string(chars);