Arrays and ArrayLists in Java

March 3, 2016 by Alex Clarke

Arrays

Arrays are very useful to know because they are a standard that is built into C, its children languages (Java, C++, etc) and other languages such as Python. An array allows the programmer to store multiple different variables, of the same type, into a single list that can be called upon as a certain object. This, coupled with loops, makes it unnecessary for the programmer to know how many variables are being stored. It does this by allowing the programmer to create one thing (the array) instead of creating multiple different variables that would all be individually initialized and named.

Reading User Input Using the Scanner Class in Java

March 1, 2016 by Alex Clarke

Java is very versatile in its ability, but can become even more versatile with the integration of user input. One way to have user input is the Scanner Class. This class allows the programmer to scan the keyboard and get input from the user.

How to Instantiate the Scanner Class

Since it is not built into the regular Java library, it needs to be imported. It can be imported like so:

Note: All imports are declared at the top of the program before the main method like so:

Coding Using Variables in Java

January 21, 2016January 13, 2016 by Alex Clarke

Java is a very versatile language, that can be used for object oriented programming (OOP), computation and many other applications. In order to make full use of Java, you need to know how to use variables.

Declaring A Data Type

Declaring your data type is one of the most important things when it comes to strong information. You are essentially warning the program what type of information it should be expecting. Declaring the correct type is important because once you declare a variable as a certain data type it can not be changed. Let’s look at some examples:

Starting to Code in Java

January 21, 2016November 15, 2015 by Alex Clarke

Java is a versatile language that is great for beginners. Learning to code in Java is also fairly easy to learn how to use and has many applications. Java is an Object Oriented Programming (OOP) language. This means that by defining objects using Java we can create our own variable types. If you are new to java coding feel free to check out my other pages on what an IDE is and how to download one, how to use jGrasp, and how to use Eclipse. I will be using Eclipse to show you how to start coding.

Using the Eclipse Environment

February 5, 2017November 10, 2015 by Alex Clarke

What is an IDE (Integrated Development Environment)? Which ones are good for beginners and which are good for intermediate programmers? What is Eclipse? How and where can you download it? All this and more can be found in my previous article by clicking here.

This is where I left off in my article Getting Started with Coding in Java:

Using the jGrasp Environment

January 21, 2016August 27, 2015 by Alex Clarke

What is an IDE (Integrated Development Environment)? Which two IDEs would I suggest? What is jGrasp and how do you download and install it? You can find out in my previous article by clicking here.

This is where I left off with jGrasp in my article Getting Started with Coding in Java: