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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.

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:

Arrays and ArrayLists in Java

Arrays

Reading User Input Using the Scanner Class in Java

How to Instantiate the Scanner Class