Unit tests are a great tool to have in every programmer’s toolbox. In this post, I’ll show an example of how to write a unit test to make sure your code for reading from a text file works properly. Let’s say we have two classes already implemented: Laptop and Lenovo. The class Laptop handle the […]
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Command-line arguments are a useful way to gather input for our console application. In this post, I’ll show how to use these types of arguments in your console applications. Why do we use command-line arguments? As you should know by now, algorithms solve a problem by taking input and calculating an output. For instance, you
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Files in programming is a very important topic. It is usually taught in introductory programming courses because of its importance. In this post, you will learn why we need files in programming and some examples of how to use them. What is a file in programming? As stated in Wikipedia: “A computer file is a
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Unit test is a widely used approach by developers to ensure that code does not have errors. Therefore, beginners (and not beginners) need to understand what is and how to use it. “Unit tests are typically automated tests written and run by software developers to ensure that a section of an application (known as the “unit”) meets its design and behaves
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One of the General Tree Data Structure example of application is to create game trees. In this post, you will learn how to print some levels of the game tree for the popular game Tic-tac-toe. Tic-Tac-Toe The Tic-tac-toe game consists of a 3×3 board. One player place X’s on the board and the other one
General Tree Data Structure Example: Printing levels of the Tic-tac-toe Game Tree Read More »
A Java Console Menu Application is a great way to start learning programming. With a menu console application, you can easily test your code and see results after giving certain inputs. In this post, I’ll show how to create a Java console menu application. To create a menu for a Java console application, I recommend
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The graph data structure can be used to solve many real-world problems. In this post, you will see one of the graph data structure applications. To solve the problem I’m showing you here, you can use the implementation for the undirected simple graph data structure. Graph ADT operations When you want to use a data
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The Binary Search Tree data structure implementation will help us to store data and to do efficient searches. There are two main restrictions in this data structure: Every object to the left of the root is less than or equal to the root. Objects to the right of the root are greater than or equal
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The Stack data structure implementation is studied in most Computer Science courses on Data Structure and Algorithms. In this post, you will learn one implementation of this important data structure. What is a Stack? A stack is a linear data structure that follows the Last In First Out (LIFO) principle. This means that the last
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The Queue data structure implementation is studied in most Computer Science courses on Data Structure and Algorithms. In this post, you will learn one implementation of this important data structure. One of my favourite books to study data structure is Introduction to Algorithms by Cormen. What is a Queue A queue is a linear data
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