Resources and tutorials for programmers' advanced learning journey. Advanced tracks in Java, Python, and C#. Blog: https://blog.csdn.net/badao_liumang_qizhi
This article demonstrates how to use Java 8’s java.time package to obtain the current date and time, extract components, create specific dates, compare dates, handle periodic dates, compute future and past dates, retrieve timestamps, check leap years, calculate differences, and format/parse date strings, with concrete code examples.
This article explains the seven SOLID software design principles—Open‑Closed, Dependency Inversion, Single Responsibility, Interface Segregation, Law of Demeter, Liskov Substitution, and Composite/Reuse—illustrating each rule with clear Java code snippets, refactorings, and practical scenarios such as product pricing, purchasing workflows, and database access.
This article demonstrates how to use JUnit's Assert methods for various checks, creates mock objects and verifies interactions with Mockito, and leverages Java 8 Stream's peek operation for debugging, providing complete code examples for each technique.
This guide shows how to integrate the pure‑JavaScript js‑audio‑recorder plugin into a Vue project, record, pause, play, and export PCM/WAV audio, then package the Blob into FormData and send it to a SpringBoot backend endpoint for storage, including key configuration details and common pitfalls.
This article explains why creating threads repeatedly wastes resources, introduces Java's ExecutorService thread pool, details its configuration parameters, demonstrates how to create and use fixed thread pools with Runnable and Callable tasks, shows proper shutdown, and highlights common pitfalls with Future.get.
This article shows how to use Lombok's @Builder annotation in a SpringBoot project to create flexible object constructors, avoiding multiple overloaded constructors and allowing selective field assignment through a fluent builder API.
The article introduces Java 8’s Stream API, showing how to create streams from collections, arrays, and static methods, and demonstrates common operations such as filter, map, flatMap, reduce, collect, grouping, sorting, and limiting, with concrete code examples that replace verbose loops and improve readability.
This guide shows how to download, configure, and run Apache JMeter on a Windows machine to generate 20,000 HTTP requests locally by setting up a thread group, adding an HTTP sampler, and using listeners such as the Aggregate Report to analyze the load‑test results.
This guide walks through installing the mavon-editor package, globally registering it in a Vue project, creating a component with markdown binding, configuring props, customizing toolbars, handling image uploads, and using keyboard shortcuts to provide a full-featured online markdown editor.
This guide walks through installing PostgreSQL 14 on a CentOS server via a shell script, covering repository setup, package installation, initialization, user and database creation, remote‑connection configuration, firewall adjustments, service verification, and connecting with Navicat.
