Intro to Layout Managers

Each object has a special method called a constructor. The constructor can be overloaded as necessary. Typically, you will have a default constructor (sometimes called a no-arg constructor), where no parameters is passed to the constructor. This special method is used to constructor an object when it is created. It is very similar to a…

Writing to a file in Java is similar to reading from a file, in that you have to be mindful of your exceptions, however, writing is handled by different Classes. But you will find the process very similar. Setting up the Writer Instead of using FileReader, you will want to use FileWriter. To use a…

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)…

Most languages provide a way to work with Strings, and Java is no exception. Java sometimes provides several ways to create, as well as work, with strings. We’ll look at the most common ways to work with Strings that you will experience. Creating a String Where you get a string will vary based upon your…

A Java Interface, as first glance, may look similar to a class. However, there are important differences, not only in how it is used, but in defining it from a class that make it worth noting. Uses of an Interface Java prevents a developer from extending a Class with two or more classes. This is…