Data types aren't much use unless you can do things with them. For this purpose classes have methods. Members say what a class is. Methods say what a class does. For instance our website class might have a method to print its data. If so that would look like this:
class website { String name; String url; String description; print() { System.out.println(name + at + url + is + description); } } Outside the website method we call the print method just like we referenced the member variables, using the name of the particular object we want to print and the . operator.
website x = new website(); x.name Cafe Au Lait; x.url http://metalab.unc.edu/javafaq/; x.description Really cool!; x.print(); Notice that within the website class we don't need to use x.name or x.url. name and url are sufficient. That's because the print method must be called by a specific instance of the website class, and this instance knows what its data is. Or, another way of looking at it, the every object has its own print method.
The print() method is completely enclosed within the website class. All methods in Java must belong to a class. Unlike C++ programs, Java programs cannot have a method hanging around in global space that does everything you forgot to do in your classes.