public static ArrayList<Integer> doArrayListRemoveFromEnd(int numItems) { System
ID: 3923299 • Letter: P
Question
public static ArrayList<Integer> doArrayListRemoveFromEnd(int numItems) {
System.out.print("doArrayListRemoveFromEnd: ");
ArrayList<Integer> list = new ArrayList<>();
// TODO Write code that adds integers 0 through (numitems - 1)
// to list, inside a loop.
long startTime = getTimestamp();
// TODO Write code that removes the last element from list,
// repeatedly until the list is empty.
long endTime = getTimestamp();
long totalTime = endTime - startTime;
System.out.println(totalTime);
return list;
}
Explanation / Answer
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(0);
}
Then the entire program becomes
public static ArrayList<Integer> doArrayListAdd(int numItems) {
System.out.print("doArrayListAdd: ");
ArrayList<Integer> list = new ArrayList<>();
long startTime = getTimestamp();
for(int i=0; i<numItems-1; i++){
list.add(0);
}
long endTime = getTimestamp();
long totalTime = endTime - startTime;
System.out.println(totalTime);
return list;
}
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