Maximizing code reuse in your Java programs means writing code that ... It should not also update and delete customers. public class CustomerPurchaseService { private ProductService productService ...

One of our biggest challenges as software developers is organizing our code ... pattern in the JDK, let’s create our own. First, take a look at the class diagram in Figure 2. public interface ...

there's a basic and often violated software design principle pertaining to Java method modifiers that is in need of explanation. A public method should never be called by another public method within ...