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What are the key differences between an Interface and an Abstract class?

Interface vs Abstract Class Interface 100% abstraction (prior to Java 8). Can have default/static methods (Java 8 ). No constructors. Multiple inheritance allowed. Abstract Class Partial abstraction. Can have construct

Jan 07, 2025 am 06:19 AM

Java Can Be Serverless Too: Using GraalVM for Fast Cold Starts

Introduction A fairly common approach when it comes to working with serverless code is to write it as a Python, Node or Go application given their reputation for very fast cold starts. But what if we are faced with pre-existing Java apps tar

Jan 07, 2025 am 06:16 AM

Importing SSL certificate into cacerts, via KeyStore Explorer

1. Download and install KeyStore Explorer Access the official KeyStore Explorer website: https://keystore-explorer.org/; Download the latest version for your operating system; Install the program following the installer instructions. 2. Open the file

Jan 07, 2025 am 06:12 AM

Generate a REST API Using Java and Spring Boot for your Postgres database

This tutorial will show you how you can generate a Java API for your Postgres database using monstarillo. The API will use Spring Boot and Springdoc to document it. The API will perform CRUD operations on the tables you run it against. Unit tests wil

Jan 06, 2025 pm 10:21 PM

Understanding the XOR Operator: A Powerful Tool in Computing

The XOR operator, short for Exclusive OR, is a fundamental concept in computer science, mathematics, and digital logic. Represented by the symbol ^ in many programming languages and ⊕ in mathematical notation, XOR is a logical operation that is widel

Jan 06, 2025 pm 08:16 PM

JeKa: The Simplest Way to Start with Java for Real

JeKa is a modern Java build tool focused on simplicity. When starting with Java, developers usually just write some code, compile it, and run it. However, this is not enough to create useful Java applications or libraries that others can reuse. To b

Jan 06, 2025 pm 08:13 PM

pg-index-health – a static analysis tool for you PostgreSQL database

Hello there! Since 2019, I have been developing an open-source tool called pg-index-health, which analyzes database structures and identifies potential issues. In one of my previous articles, I shared the story of how this tool came to life. Over t

Jan 06, 2025 pm 06:20 PM

Merge Strings Alternately

Hey coders! Hope you're doing well. I'm excited to share my solutions for the LeetCode-75 series, which covers 75 essential problems to help you prepare for coding interviews. In each post, I'll present my solution along with a detailed explanation

Jan 06, 2025 pm 04:18 PM

What's Changed in Java Versions

Java's Journey Through Time Java has been around for over two decades, powering robust applications across industries. It has consistently ranked as one of the most popular programming languages for building enterprise-grade applications. With

Jan 06, 2025 pm 03:11 PM

Inheritance and Polymorphism in Java: Using Superclasses and Subclasses

This article explains how Java’s inheritance has an “is-a” relationship between superclasses and subclasses, allowing subclasses to inherit and customize superclass functionality. By using polymorphism, subclasses can define unique behaviors, allowin

Jan 06, 2025 am 10:31 AM

SpringBoot Web Service - Part Github Action

GitHub Actions provide a seamless way to integrate CI/CD into your repository, automating various tasks like running tests, building artifacts, and deploying your project. Workflow for SNAPSHOT This workflow is triggered on non-main branc

Jan 06, 2025 am 06:40 AM

SpringBoot Web Service - Part Preparing Using Spring Initializr

Creating a Service Using Spring Boot and Maven In this post, we'll create a simple service using Spring Boot and Maven. Let's walk through the steps to set up a project and add the necessary dependencies. Step 1: Navigate to start.spr

Jan 06, 2025 am 04:15 AM

Java Constructors

Java Constructors: Java constructors or constructors in Java is a terminology used to construct something in our programs. A constructor in Java is a special method that is used to initialize objects. The constructor is called when an object of a cl

Jan 06, 2025 am 03:47 AM

SpringBoot Web Service - Part Initial Configuration

In this post, we'll explore how to configure OpenAPI in your Spring Boot application and add a convenient redirection from the root URL to the Swagger UI. This setup will improve your API documentation and make it more accessible to developers.

Jan 06, 2025 am 01:36 AM