NOTE: Usually this design pattern is used with Clonable, but it isn’t recommended. Check here for more info (search for Copy Constructor versus Cloning). In terms of programming, usually (USUALLY), we need to create objects with identical properties as other ones, it may kind of like this: EventDto.java public class…

In all these years of being a java developer, I’ve seen quite a few design patterns, but the observer isn’t one of them that I’ve seen used very often. Probably because its structure is not fully hierarchical and it can be more difficult to debug and read when you don’t…

Let’s recap, you are a programmer, as a programmer you love conditions, since you started programming it is the first thing you learned. But then you see something like this: public void createPayment(PaymentType paymentType) { if (paymentType == PaymentType.CREDIT_CARD) {// More code here…

Everybody has faced the same problem once coding. You need to create an object, and it has a huge constructor. Example: User user = new User("1", "John", "Travolta", "amazing street", "2", "New York"); User.java public class User { private String id; private String name…

Let’s say you want to use a class several times since it usually has information that must be used multiple times and also be easily accessible. One approach to the solution is creating a class instance in every method that you require it and using as much as you want …

Si quieres validar tu objeto automáticamente en Spring Boot se puede usar “javax.validation.ConstraintValidator”. En esté post dejaré un ejemplo de cómo se puede crear uno especifico para tu projecto. En este ejemplo verificará si el campo LocalDate es mayor de edad. También puedes usar los ya creados que puedes mirar…

Esta story viene dada por una reflexión que tengo en mi cabeza desde que deje mi casa, en el año 2010. Mi familia nunca ha tenido demasiado dinero ni interés en viajar por lo que siempre he vivido en mi ciudad y sólo he ido de una ciudad a otra…

This story comes because a reflexion that I have in my head since I left my house, in 2010. …

Todos hemos empezado en el colegio a aprender uno o varios idiomas, se nos enseña en mejor o en peor medida a saber comunicarnos en un ambiente que no es el que usualmente necesitamos en nuestro entorno. …