public class JavaReverseString {

public static void main(String[] args) {

System.out.println(reverseString("abc"));

System.out.println(reverseString("123!@#098*"));

}

public static String reverseString(String in) {

if (in == null)

return null;

StringBuilder out = new StringBuilder();

int length = in.length();

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

out.append(in.charAt(i));

}

return out.toString();

}

}