Printing reverse of any String without using any predefined function?

Question

How to print the reverse of the String java is object orientated language without using any predefined function like reverse()?

Answer 1

 public class ReverseWithoutStringAPI {

public static void main(String[] args) {

      String st="hello";

        StringBuffer b=new StringBuffer();

        for(int i=st.length()-1;i>=0;i--){

            b.append(st.charAt(i)); }

        System.out.println("reverse:::"+b);
}
}