The designer of the class controls what can be seen and manipulated by any program that uses their class. Let's look at the access modifier you have probably already noticed before the class keyword like this:

public class Soldier{
   //Implementation goes here
}

There are two main access modifiers for classes in the context we have discussed so far. Let's briefly look at each in turn:

So now we can make a start at this encapsulation thing. But even at a glance, the access modifiers described are not very fine grained. We seem to be limited to:

The benefits here are easily taken advantage of, however. The idea would be to design a package that fulfills a set of tasks. Then all the complex inner workings of the package, the stuff that shouldn't be messed with by anybody but our package, should be default access (only accessible to classes within the package). We can then make available a careful selection of public classes that can be used by others (or other distinct parts of our program).