To use an ArrayList in your program, you must import:1. the java. collections package2. the java. awt package3. Nothing; the class is automatically available, just like regular arrays. 4. the java. util package5. the java. lang package

Option 4: the java. util package

Explanation:

Java Array List is not imported by default and therefore we need to import java. util package. Array List is one of the Java predefined collections used to store a group of entities.

One advantage offered by Array List compared with a normal array is that an item can be dynamically added into the list without recreating a new list. Besides, array list also offered some built in methods to manipulate the elements within the list that can save a project development time.