The MVC (Model View Controller) pattern is not unique to Java, not by any stretch of the imagination. You often see it in web designs. the idea is to separate out each object into a 3 tier system, very similar to how you would in a traditional 3 tier system. Controller The controller works on…
The factory design pattern is one of the original design patterns by the Gang of Four. It follows the idea of using implementation of interfaces instead of different classes, and allows you to request a object from the factory. Now design patterns are not specific to a language. You will find that sometimes these patterns…
As mentioned when we talked about three-tier systems, one of the key aspects is keeping elements separated so they can be updated/changed. You may have different User Interfaces, such as Web, Mobile, and even Desktop Applications, which can all co-exist because they call to load info from the business logic server (sometimes called app server)…
When developing a Java application which uses a database, you need to consider several things, such as are you developing the Java Application first, or the Database first? Which database are you going to use (Oracle, DB2, SQL Server, MySQL, etc) Regardless, you will need a JDBC driver for your Java application. Most likely this…
Design patterns are meant to be a form of best practices as to how to develop object oriented code and found by trail and error in many cases. Additionally design patterns are supposed to provide a common platform for developers, so they can talk to one another based upon what they expect to occur. By…
Of the several patterns out there, the Java Singleton is one of Gangs of Four Design patterns. In many ways it is one of the simplest design patterns to implement, however it does come with some concerns. The basic idea is that there can be only one object of a given class, and by its…
In complex applications, we generally do not want to think about applications as containing all of the data, data access, user interface, and business logic into a single set of code. Now some applications will have more complicated layers, additional layers, or hybrid layers, but the basic idea is here. Little changes can be difficult…
We looked at Serializing a Single Object previously, but what if we need to serialize multiple objects, like an array? Serializing an Array Well, we can do that fairly easily as well. Java can take an array of objects, and serialize it. However, it will only work if you de-serialize it as an array. Consider…
