Inside of a method, like our main method, we might want to create some variables for use. Java gives us numerous primitive data types that we can use, and within a method, we declare and use them, just like we would in C/C++. Comments You might have noticed the comment above. Comments in Java are…
Just like in C++, each executable Java project should have a main method. This isn’t just the “main” method that is run, but an actual method called main(). If you look at the previous page for creating a file, we can start from there. This will be a little different from the C++ main method,…
Creating our first file is fairly simple. Using an IDE like Visual Studio Code is a good place to start. Eclipse is another popular IDE, as are some others. However, you only have to have a plain text editor if you want. You can use a command line compiler and run time tool if you…
Java was designed with a couple of main purposes in mind to be Object Oriented from the beginning, as a “write once, run anywhere” model, so that code doesn’t have to be rewritten While the idea behind Java hasn’t always held true, where lots of front end code would be written and run equally on…
Classes are often directly related to a physical or abstract object in the real world. Think about an automobile, they could derive to other types of vehicles such as a car, truck, or van. They may contain other complex objects such as an engine, dashboard, on board display system, and safety systems. Just like those…
Like other types of diagrams, UML Class diagrams allow you to visualize, in this case, the design of a class. Since classes are at the root of Object Oriented Design, this is one of the most common diagrams you will find yourself creating. A class diagram will contain: The class name, The class’s attributes, The…
A package is a grouping of related UML elements, such as diagrams, documents, classes, or even other packages. Each element is nested within the package, which is depicted as a file folder within the diagram. The elements are then arranged hierarchically within the diagram. Package diagrams are commonly used to provide a visual organization of…
Unified Modeling Language (UML) is a general purpose modelling language whose main purpose is to to define a standard way to visualize how a software application/system is to be designed. UML is an approved standard since 2005 which makes it easy to find tools and users which can share documents between users. UML is not…
