In this lesson, you are going to learn another important type of collection: multidimensional arrays in java. Imagine we must create a program to represent a matrix. A matrix in mathematics, is a rectangular array or table of numbers, symbols, or expressions. In this example, we will consider only a matrix of integer numbers. The […]
Two dimensional arrays in Java (with examples) Read More »
Collections is a very important topic in programming. Almost every code you will write will use collections in one way or another. In this article, you will learn what a collection is and how to use it in Java. There is a general term widely used in the programmer’s community to refers to a collection:
Collections in Java: Unidimensional arrays Read More »
Solving problems using a programming language is the main aim of learning programming. Let’s see an example of a problem and how to solve it using everything we learned until now (Unit 1 and 2). To solve a problem using programming, we have to follow certain steps, usually on the same order. We first identify
Solving problems using Java programming language: a full example Read More »
Loops in Java is the structure that will allow us to implement algorithms with repetitions. In this lesson, you will learn the two different types of loops you can find in most programming languages. Also, you will see how to use them in Java. From the lesson algorithms with repetitions, we created the following algorithm
Conditionals in Java is a must know if you want to write code in Java that solves a problem. It is one of the most important building blocks in every programming language. In this article you will learn what are conditionals statements and how to use them. Commonly, in our life we take a decision
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Expressions are an important tool for programmers. We can divide them into arithmetic and logic expressions. Let’s see what expressions are and how we can use them to solve problems. As stated here: “An arithmetic expression is an expression that results in a numeric value. There are two kinds of numeric values, integers (whole numbers),
Arithmetic and logic expressions in Java Read More »
Objects are a central concept in Object-Oriented Programming (OOP). In this article, you will learn what objects are in OOP and how to use them. From the previous lesson, we learned that “In Object-Oriented Programming, we use classes to represent concepts of the real world.”. In other words, a class is used to represent a
Object-Oriented Programming: Objects Read More »
Java is one of the several programming languages one can use. In this article, you will find a very short introduction to Java, which is all you need to start writing computer programs. So, Java is a programming language, but: What is a programming language? Informally, a programming language is a way that we (programmers,
Object-Oriented Programming: A gentle Introduction to the Java Programming Language Read More »
Applying algorithms is the goal when you want to use a programming language to solve problems. In the last unit of this course we studied how to create simple algorithms. This one, is about how to apply those algorithms using a programming language. If you missed the first unit, you can find it here. Notice
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Class is the main concept in Object-Oriented Programming. If you really want to understand and use object-oriented programming, you must master the concept of Class. In this article I’ll answer the following questions: What is Object-Oriented Programming (OOP)? Which is the main concept in OOP? What are a data structure and an abstract data type (ADT)?
Object-Oriented Programming: Classes Read More »
