ArrayList in AP Computer Science A

ArrayList list = new ArrayList();

ArrayList list = new ArrayList();

ArrayList list = new ArrayList();

ArrayList

To check if the ArrayList is empty.

To return the maximum number of elements the ArrayList can hold.

To return the number of elements currently in the ArrayList.

To set the size of the ArrayList.

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for (int i = 0; i < names.length; i++) { System.out.println(names[i]); }

for (String name : names) { System.out.println(name); }

for (int i = 0; i < names.size(); i++) { System.out.println(i); }

for (String name = 0; name < names.size(); name++) { System.out.println(name); }

When you need to access elements in reverse order.

When you need to modify the elements of the ArrayList.

When you need to know the index of the current element.

When you need to modify the size of the ArrayList during traversal.

The loop will automatically adjust and continue without issues.

A ConcurrentModificationException is thrown.

The changes will not be reflected until the next iteration.

The loop will terminate prematurely without any error message.

Integer[] array = list.toArray();

Integer[] array = (Integer[]) list.toArray();

Integer[] array = new Integer[list.size()]; for (int i = 0; i < list.size(); i++) { array[i] = list.get(i); }

Integer[] array = new Integer[list.size()]; array = list.toArray();

Ensuring data structures are efficiently implemented.

Protecting user privacy and preventing misuse of personal information.

Optimizing data retrieval speed.

Complying with copyright laws for data storage.

It makes the data smaller and easier to store.

It converts plain text into a code to protect the data from unauthorized access.

It automatically backs up the data in case of system failure.

It organizes the data into a more readable format for users.