Program for reverse of String in java

import java.util.Scanner;
public class ReverseOfString {
    public void reverseOfString(String string){
        String reverseString = "";
        int lenth=string.length();
        for(int i=lenth-1;i>=0;i--){
            reverseString=reverseString+string.charAt(i);
        }
        System.out.println(reverseString);
    }

    public static  void main(String args[]){
        
        ReverseOfString r = new ReverseOfString();
        r.reverseOfString("we have to reverse this string");
        
    }
}