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7.1 Introduction to ArrayList

Part of ArrayList in AP® Computer Science A. Read the opening section, then create a free account for the full interactive lesson, practice, and progress tracking.

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An ArrayList is a flexible data structure in Java that can change its size. Unlike standard arrays, you don’t need to declare its size ahead of time. This makes ArrayLists perfect for when you’re not sure how many elements you'll need or if the data might change.

In this unit

7 lessons

  1. 7.1Introduction to ArrayListThis lesson
  2. 7.2ArrayList MethodsPreview lesson
  3. 7.3Traversing ArrayListsPreview lesson
  4. 7.4Developing Algorithms Using ArrayListsPreview lesson
  5. 7.5SearchingPreview lesson
  6. 7.6SortingPreview lesson
  7. 7.7Ethical Issues Around Data CollectionPreview lesson

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