Can I have some help debugging this exercise:// Application lists valid shipping codes// then prompts user for a code// Application accepts a shipping code// and determines if it is validimport java. util.*;public class DebugEight1{public static void main(String args[]){Scanner input = new Scanner(System. in);char userCode;String entry, message;boolean found = false;char[] okayCodes = {'A''C''T''H'};StringBuffer prompt = newStringBuffer("Enter shipping code for this delivery\nValid codes are: ");for(int x = 0; x < length; ++x){prompt. append(okayCodes[x]);if(x != (okayCodes. length - 1))prompt. append(", "); }System. out. println(prompt);entry = input. next();userCode = entry. charAt(0);for(int i = 0; i < length; ++i){if(userCode = okayCodes){found = true;}}if(found)message = "Good code";elsemessage = "Sorry code not found";System. out. println(message);}}