ArrayLists

If we have an ArrayList instruction with the element “Stop” at index 5, how do we change the string at 5 to “Go”?

• list.add(5, "Go")

• list.add(4, "Go")

• list.set(5, "Go")

• list.set(4, "Go")

You can use the set method to place an element in a list at any index you want

• true

• false

You can use the add method to place an element in a list at any index you want

• true

• false

If aList is an object of the class ArrayList<String> that contains four strings “red”, “blue”, “green”, and “yellow”, what is the order of the strings on the list after aList.add(2, “orange”); ?

• {“red”, “blue”, “orange”, “green”, “yellow”}

• {“red”, “orange”, “blue”, “green”, “yellow”}

• {“red”, “blue”, “green”, “orange”, “yellow”}

If you create a list using

ArrayList<Double> doubleList = new ArrayList<Double>(20);

can the list contain more than 20 elements?

• Yes because capacity isn't fixed

• No because capacity is fixed

How do you decrease the current capacity to the current size?

• trimToSize()

• clear()

• trim()

• decreaseCapacity()

What is the difference between ArrayList size and capacity?

• size is the number elements in the list while capacity is the maximum number of elements it can hold without resizing

• capacity is the number elements in the list while size is the maximum number of elements it can hold without resizing

• both represent the number of elements in the list

• both represent the number of elements the list can hold before resizing