reverse string optimization

Author: Ahmed Tawila

src/main/java/javarevisited/top/fifty/java/programs/from/coding/interviews/ReverseAString.java

@@ -3,13 +3,13 @@
 public class ReverseAString {
 
 	public static String reverseString(String s) {
-		String result = "";
+		StringBuilder result = new StringBuilder();
 		for (int i = 0; i < s.length(); i++) {
-			result += s.charAt(s.length() - i - 1);
+			result.append(s.charAt(s.length() - i - 1));
 		}
-		return result;
+		return result.toString();
 	}
-	
+
 	public static void main(String[] args) {
 		String test = "To be reversed!";
 		System.out.println(reverseString(test));