Arrays

Arrays, Java's simplest container: one variable holding a fixed number of values of one type, each reached by its position. It is also the container that throws most often, and it is what the lists in Java Collections and Streams are built on and improve upon. It covers what an array fixes when it is created, declaring and filling one, why indexes start at zero, the out-of-bounds exception, length against length() against size(), and why an array cannot grow. It leaves out arrays of arrays beyond a mention.