public static HashSet doHashSetSearchGreatestint numItems S

   public static HashSet<Integer> doHashSetSearchGreatest(int numItems) {

       System.out.print(\"doHashSetSearchGreatest: \");

       HashSet<Integer> set = new HashSet<>();

       // TODO Write code that adds integers 0 through (numItems - 1)

       // to set.

       long startTime = getTimestamp();

       // TODO Write code that checks if integer (numItems - 1)

       // is a member of set.

       long endTime = getTimestamp();

       long totalTime = endTime - startTime;

       System.out.println(totalTime);

       return set;

   }

Solution

1.Code that appends integers 0 through (numitems - 1) to the list. I have added a loop for adding values to the list

for(int i=0; i<numItems-1; i++)

       list.add(i);

2.code that checks if integer (numItems - 1)

if(set.contains(numItems-1))

   System.out.println((numItems-1)+ \" is a memeber of set\");

else

   System.out.println((numItems-1)+ \" is not a memeber of set\");

   long endTime = getTimestamp();

//long endTime = System.currentTimeMillis();

long totalTime = endTime - startTime;

System.out.println(totalTime);