To illustrate how generics are used in the Java Collections Framework, let’s look at some examples. List and ArrayList with generics. In the above example, we already briefly explored a simpler ...

Using generics results in more robust code and avoids ClassCastExceptions in your Java programs. This in-depth tutorial introduces you to generics and their types and methods.

If you need to use arrays in Java that can be resized, then you might opt for the ArrayList. An ArrayList is not as fast, but it will give you more flexibility at runtime.