Java OCA OCP Practice Question 3177

import java.util.Map;
import java.util.TreeMap;
public class Main {
 public static void main(String[] args) {
   Map<Integer, StringBuilder> myMap = new TreeMap<Integer, StringBuilder>();
   for (Integer key : new int[] {1, 2, 1, 3, 1, 2, 3, 3}) {
     // (1) INSERT CODE HERE ...
   }//from   w ww. j a  v  a  2 s  .c  o m
   System.out.println(myMap);
 }

 private static StringBuilder toggle(StringBuilder strBuilder) {
   String value = "Odd";
   if (strBuilder.toString().equals(value))
     value = "Even";
   return strBuilder.replace(0, strBuilder.length(), value);
 }
}

(a) StringBuilder value = myMap.get(key);
    myMap.put(key, (value == null) ? new StringBuilder("Odd") :
                    Main.toggle(value));

(b) StringBuilder value = myMap.get(key);
    if (value == null)
      value = new StringBuilder("Odd");
    else/*from  w w w  .j av  a2s. c  o  m*/
      Main.toggle(value);
    myMap.put(key, value);

(c)  StringBuilder value = myMap.get(key);
     if (!myMap.containsKey(key))
      myMap.put(key, new StringBuilder("Odd"));
     else
      Main.toggle(value);

(d)  All of the above.