class Main { public static String reverse(String str) { char c[] = str.toCharArray(); for(int i=0; i<c.length/2; i++) { char t = c[i]; c[i] = c[c.length-i-1]; c[c.length-1-i] = t; } return String.valueOf(c); } public static void main(String[] args) { String str = "word"; } }