@josealonso

Java Data Types at a glance

Jan 3 · 7 min read · Java Data Types Java requires specifying the data type when declaring a variable.This has two goals: To know how many memory locations are used. To know which operations can be performed on the data. The basic operations are addition, subtraction, ...

How to create a class - Best Practices

Jul 22, 2025 · 7 min read · Introduction We will explain how to create an object in Java. It has evolved from the old Javabeans to the use of features in the latest versions of the language. Setters and getters We have a Person with three attributes: name, age and gender. impor...

Hash Tables and hashCode()

Jun 18, 2025 · 5 min read · Introduction When creating a class in Java, there are three methods that are commonly overridden: equals() hashCode() toString() This article focuses on the hashCode() method. How a hash table works Java uses the value returned by the hashCode()...

Mastering Object Equality in Java

May 2, 2025 · 6 min read · Introduction The == operator is used to compare references, while the equals method is used to compare the contents of objects. Comparison for predefined types Primitive types The comparison operator works with predefined types, such as integers, boo...

How to use an interface

Apr 23, 2025 · 5 min read · Introduction This article may seem too basic, but I decided to write it after seeing that many programmers do not know how to use interfaces in Java. This topic is related to design patterns in object-oriented programming (OOP). An apparently simple ...