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Java 27???值得关注的新特???
1+ hour, 32+ min ago (89+ words) Java 开发者们，Java 27 即将在本周二（9 月 15 日）正式发布！ 发布时间：2026 年 9 月 15 日 核心焦点：共计 9 个 JEP（4 个正式特性，5 个预览/孵化特性） Java 27 通过 JEP 523 将 G1 GC 设置为全局默认垃圾回收器，彻底终结了这一行为差异。 紧凑对象头（Compact Object Headers）在 JDK 25 中作为正式功能引入，而在 Java 27 中正式通过 JEP 534 调整为默认启用！ 这一改动显著降低了对象占据的内存空间，从而直接减轻 CPU…...
Quick Sort: Fast Sorting with Divide and Conquer
2+ hour, 31+ min ago (1027+ words) Sorting is everywhere in software. In the previous article, we learned Merge Sort, which can sort an array in O(n log n) time. Quick Sort also uses the Divide and Conquer strategy, but it approaches the problem differently. Instead of…...
Scoped Values in Java 25: Retiring ThreadLocal in Your Spring Boot Request Context
24+ min ago (34+ words) If you have ever carried a tenant ID, a correlation ID, or the current user through a Spring Boot request without …...
Ditch H2: PostgreSQL Repository Tests with Testcontainers and @ServiceConnection in Spring Boot 4
4+ hour, 42+ min ago (204+ words) Your repository tests are green. Then production throws a column “metadata” is of type jsonb but expression is of type character varying…Continue reading on Medium » Ditch H2: PostgreSQL Repository Tests with Testcontainers and @ServiceConnection in Spring Boot 4 Your repository tests…...
Spring Boot 4 + Java 25: 10 Things You Should Stop Doing in Your REST APIs
5+ hour, 52+ min ago (38+ words) Modernizing only works when you can say out loud what each change buys you. “It’s newer” is not a reason. I keep a …...
Build a small OpenOSRS plugin in Java
14+ hour, 33+ min ago (412+ words) A small plugin is a good way to learn a desktop client's extension system. This example displays a chat message after login. It covers discovery, dependency injection, game events and packaging without automating gameplay. I maintain the OpenOSRS project at…...
XML Configuration Mode: Decoupling Your API Catalog from Business Code
14+ hour, 5+ min ago (227+ words) In this post you'll learn to: The XML file names each request and declares its return type. The factory binds those entries to interface methods by method name. Change the curl in XML → the running app changes behavior. No Java…...
Architecting a Low-Power Geofencing Engine for Android
14+ hour, 57+ min ago (1671+ words) It happened during a quiet, mid-afternoon meeting. The room was deathly silent, the air thick with the weight of a quarterly review, when my phone decided to belt out an aggressive, high-decibel ringtone. My face turned crimson. I scrambled to…...
How Seed4J Validates Compatibility
17+ hour, 27+ min ago (279+ words) How Seed4J uses Renovate, GitHub Actions, and 25 generated project configurations to validate compatibility across modern technology stacks. Tagged with opensource, githubactions, devops, security....
Understanding == vs.equals() in Java: The Beginner's Trap That Cost Me Hours
18+ hour, 43+ min ago (134+ words) When I first started learning Java, I wrote a simple login system. The password entered by the user was exactly what was stored in the database. I looked at the screen, compared the two strings, and they were identical. Yet,…...