Tag: Spring
How do functional interfaces work in Java?
Functional Interfaces are a fundamental concept in functional programming introduced in Java 8. They are interfaces that have exactly one abstract method, allowing the use of lambda expressions and method references to make the code more concise and readable. They can be used in Streams, for example, and promote code reuse. We can find several…
Read More What is Shallow Copy and Deep Copy in Java?
When developing software, there may be situations where it is necessary to create copies of objects to prevent unwanted behaviors, whether to avoid different parts of the system modifying the same object or for any other reason that prevents undesired behavior. Java provides the Cloneable interface, which allows object copying. There are two types of…
Read More How does serialization and deserialization work in Java?
Serialization and deserialization are essential for persisting or transferring data between systems. Serialization transforms Java objects into formats like JSON or XML, enabling storage or network transmission. Deserialization, on the other hand, restores these objects, making the data reusable in applications. These processes are widely used in APIs, data persistence, and communication between distributed systems,…
Read More How to use Generic Types in Java?
The use of Generics in Java improves security, readability, and code reuse, simplifying the development of robust and secure applications. Let’s see some usage examples below. Generic Methods <T>: It’s a generic type parameter, accepting any type. T Item: The method accepts a parameter of the generic type. We can specify, for example, String and…
Read More How to sort Java Collections?
Sorting in Java Collections is an essential feature for organizing collection elements in ascending or descending order. Using the Comparable or Comparator interfaces, custom sorting criteria can be defined. The Collections class provides utility methods, such as sort(), to apply these rules. This enables efficient and flexible data processing. Hands on The following example is…
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How does Poor Man’s Load Balancer work?
Understanding the concept of Poor Man’s Load Balancer is an interesting and educational approach, especially for grasping the fundamentals of horizontal scalability using containers and load balancing. Horizontal scalability allows multiple container instances, and requests will be distributed by the Load Balancer. This model is widely used in high-demand environments. Benefits: Problems and Solutions: How…
Read More How to run tasks in parallel with timeout in Java?
The use of Threads is essential to improving the performance and responsiveness of modern applications. With threads, it is possible to execute multiple tasks simultaneously, maximizing processor resources. They allow intensive operations, such as calculations or accessing external resources (e.g., databases, APIs), to be performed in parallel without blocking the main execution. Imagine the following…
Read More How to create a Docker Image using maven?
Creating Docker images using Maven is essential to integrate the containerization process directly into the application’s build and deployment pipeline, offering significant benefits for developers and DevOps teams. Let’s see how to create a Docker image with Maven in Spring. This post is a continuation of the previous one; if you have any questions, feel…
Read More How to build application image with Dockerfile?
Since this is a Java application, I need to use an image that can run a Java application. We need the Dockerfile and to use the OpenJDK base image. This Dockerfile is a recipe for building a Docker image that runs a Java application. Each instruction in the Dockerfile has a specific purpose. Let’s go…
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How to handle exceptions in Spring?
Exception handling in APIs is essential to ensure clear and efficient communication between the server and client, preventing unexpected interruptions and enhancing the user experience. By properly handling exceptions, the API can return user-friendly and informative error messages, making it easier to identify and resolve issues. Additionally, this practice improves the application’s security and robustness,…
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