Reverse A String

StringReverse.java

public class StringReverse {
  
      public static String reverseString(String str){
        StringBuilder dest = new StringBuilder(str.length());
        
        for(int i = str.length()-1;i>=0;i--){
            dest.append(str.charAt(i));
        }
        return dest.toString();
    }
    
    
    
    public static void main(String[] args) {
        System.out.println("reverse string");
        String word = "Hello world";
        System.out.println(reverseString(word));
    }
}