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…
We’ve talked about arrays, now let’s look at how they are created in Java. In a general form, you can find something like below: Obviously type would be something like int, float, or even a class name as you can have an array of objects. Declaring an Array This means that the following are ways…
Writing a class or two doesn’t seem to create that big of a problem, and for simple projects it’s not. However, this isn’t effective for large projects with dozens, if not hundreds, of Classes. That’s where packages come into play. A Java package is a way to both logically and physically organize your Java code….
We’ve looked at building our Java Class (here and here), but how do we use it? Let’s look into this. Once our class is complete, or complete enough – we can always go in and modify it further based upon new functionality needed, fixes to bugs, etc, we can instantiate it. That is, we can…
In our previous example, we had a class with a default constructor where we passed no arguments into the class. That is great, unless you want to set one or more class variables with data at run time. So lets look at overloading the class constructor. In this example, we keep our default constructor, but…
This introduction/refresher to Java Classes is assuming that you’ve worked with some Object Oriented language before, like C++, or maybe even Java and you just need a quick refresher. In Java, everything you build will be a class, with very few exceptions. to define a class, you will need a file name, with the same…
Let’s look at some other examples we might have with Java in this quick refresher. When using a local variable (i.e. one inside of a function, you don’t need to give an access modifier (private, protected, package, or public). However, you do need to provide it with a name (sometimes called an identifier) and a…
