Tutorials

Practical backend tutorials for Java, Spring Boot, databases, DevOps, and modern application architecture with production context.

Build File Upload with Preview in Angular and PrimeNG

Build a modern file upload system in Angular 20 using PrimeNG with drag and drop, previews, progress bars, and validation.

Understand GPL, LGPL, Apache, and MIT licenses in Java. Learn hidden legal risks, compliance rules, and how to protect your code.

Build a lightweight Kanban task management app using Angular and PrimeNG with drag and drop, dialogs, cards, and local storage.

Build an automated GitLab CI/CD pipeline for Spring Boot using Docker. Learn build, test, auto, and manual deployment steps.

Learn how to build a modern login and registration UI with Angular 20 and PrimeNG using reactive forms, validation, and routing.

Learn how to run GitLab on Docker and integrate it with a Spring Boot project to build a reliable, automated CI/CD pipeline.

Learn how to build flexible and responsive layouts in Angular 20 using PrimeFlex utilities for grid, flexbox, and spacing.

Learn how to generate PDFs in Java using Apache PDFBox. Create documents with text, images, fonts, tables, and pages.

Learn how to build modern, responsive interfaces using Angular and PrimeNG with TypeScript, theming, routing, and UI components.

Learn how to generate professional PDFs in Java using OpenPDF. Create invoices, tables, images, and styled documents easily.