Answer Posted / bokhtiar mehedy farsim

public class StringReverse {

public String reverse(String str) {
if ((str == null) || (str.length() <= 1)) {
return str;
}
return reverse(str.substring(1)) +
str.charAt(0);
}

public static void main(String args[]){
StringReverse ob=new StringReverse();
System.out.println(ob.reverse("Hello"));
}
}

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