Topic

java

A collection of 35 issues

Favour empirical evidence over extended arguments

Often, we get into extended arguments when we have to pick an optimal solution from multiple available options. Especially in the case of science and technology, gathering empirical evidence is a highly effective solution. In this post, I share my experience of a code review. This was the first piece

Micronaut Dependency Injection - The stand-alone Setup

In this post, let's explore how to use Micronaut as the Dependency Injection container in a stand-alone Java application. Let's start by creating a stand-alone Java application. I make use of the initialisers provided by Gradle (gradle init command). The application structure looks as follows. ➜ microdemo

Effective Java with Groovy - Immutability

It would seem like mutability is the default design approach when it comes to Java. However, reading "Effective Java" makes you change your mind. The book suggests - 'minimise mutability'. Also, what is highly useful is the reason for favouring immutability - "immutability is simple&

Effective Java with Groovy - Enabling Order

This post shows how does Groovy make it convenient for you to implement Comparable and Comparator interfaces.

Java - end of the road for Paths

Java introduced NIO 2 APIs with version 1.7. I wrote an article several years ago, after seeing not many developers make use of the new API. With this API, you would use java.nio.file.Path instead of java.io.File to represent a file. To get an instance

Micronaut HTTP Client - Error Flow

We have seen Micronaut BlockingHttpClient in action and how to use exchange and retrieve methods to interact with an HTTP endpoint. What happens if your endpoint returns HTTP status code greater than or equal to 400 (they indicate that it's an error)? To explore this, let's

Effective Java with Groovy - Favour Internal Iterators

Let's start with the following code making use of the traditional for loop. List<String> languages = List.of("Java", "Groovy", "Kotlin"); // List.of() requires Java 9 or above for (int i = 0; i < languages.size(); i++) { System.out.println(

Gradle - running tests in Continuous Build

In a previous post, we saw Gradle's continuous build in action. If you use Test Driven Development at work, you will be running your tests after every code change. Let's leverage Gradle's continuous build so that you don't have to trigger the

Micronaut - Reloading using Gradle's Continuous Build

I have written about my thoughts on hot loading in general in this post. Micronaut from version 1.2 started supporting continuous build, but you had to manually add the configuration entries to your project. With the 2.0 version, Micronaut supports 'continuous build' out of the box.

Effective Java with Groovy - Are you implementing equals and hashCode correctly?

Consider the following Groovy code. class Product { String sku String description BigDecimal price } Now let's put the Product class into use as follows. Product book1 = new Product(sku: 'P101', description: 'Effective Java', price: 599.0) Product book2 = new Product(sku: 'P101', description: