As a class, String also has methods, meaning that it can provide useful data about itself such as its length. The same is true for other types, such as Arrays. Arrays in Java are variables that ...

Remember that in Java, for a reference variable of some type referring ... void write(T data) { this.data = data; } // T is input parameter type T read() { return data; ...

It's not very restrictive. However, rules are different from conventions. Java naming conventions for variables, methods and reference types are where things get a little more complicated. For example ...