Category: Java

List is one of the most commonly used collections in Java. Some List implementations are LinkedList, ArrayList, and Stack. In this post, I will take you through some of the common operations performed on List. Overview In Java, List is an interface that provides the facility to maintain an ordered collection. It provides different methods that […]Continue reading

Java 14 introduces a new feature called Records. In Java, Record is a special type of Java class. It is intended to hold pure immutable data in it. The syntax of a record is concise and short as compared to a normal class In this post, I will explain why do we need Java records and […]Continue reading

A Spring Boot RESTful service is typically divided into three layers:  Repository, Service, and Controller. This layering helps to segregate the RESTful application responsibilities and enabling loose coupling between the objects. When you develop a layered RESTful application, you will also need to test the different layers. In this post, I will discuss testing Spring […]Continue reading

Introduction In this article, we will look at Spring Framework’s support of immutable property binding. We described Spring external configuration in this article and also provided a more detailed article about the Java bean properties binding. In this article, we will demonstrate constructor binding using the merchant account configuration in this article. Constructor binding enables […]Continue reading

Introduction In this article, we explained why we should externalise our application configuration data. We also provided configuration examples that use various methods supported by Spring Boot. Within these methods was the Java bean properties binding but it was less detailed. Therefore in this article, we are going to give more details about using the […]Continue reading

Java 8 introduced a new date and time API defined inside java.time package. The key date and time classes defined in this package are LocalDateTime, LocalDateTime, and OffsetDateTime. OffsetDateTime represents a date-time with an offset. This class stores all date and time fields, to a precision of nanoseconds, as well as the offset from UTC/Greenwich. […]Continue reading

Java 8 introduced a new date and time API defined inside java.time package. The key date and time classes defined in this package are LocalDateTime, ZonedDateTime, and OffsetDateTime. OffsetDateTime represents a date-time with an offset. This class stores all date and time fields, to a precision of nanoseconds, as well as the offset from UTC/Greenwich. For […]Continue reading

In this post, we are going to talk about OpenFeign which is a declarative REST client that we can use in our Spring Boot applications. Feign helps us a lot when writing web service clients, allowing us to use several helpful annotations to create integrations. Originally Netflix developed Feign, but as they stopped supporting the […]Continue reading

jEnv is a command line to that for Linux and OS X that makes setting the JAVA_HOME environment variable simple. Windows users can use jEnv from a Linux subsystem. Installation To install jEnv on Linux or OS X will first clone the git repository to our home directory using this command: $ git clone https://github.com/gcuisinier/jenv.git […]Continue reading