It is very common for a program to manipulate data that is kept in a list. You have already seen how this is done using arrays. Arrays are a fundamental feature of Java and of most programming languages. But because lists are so useful, the Java Development Kit includes the ArrayList class, which works much like an array but has additional methods and features.

The key topics for this lesson are:

• Array Implementation of a list
• The ArrayList Class
• Object Casts
• Wrapper Classes
• Summary/Review