Sharing computer programming language knowledge, focusing on Java fundamentals, data structures, related tools, Spring Cloud, IntelliJ IDEA... Book giveaways, red‑packet rewards and other perks await!
The article explains why integrating a national anti-fraud center into the Linux kernel is technically absurd and dangerous, violating kernel design principles of generality, stability, and least privilege, and how such a move would compromise security and user control.
JDK 27 introduces nine JEPs, highlighted by G1 GC becoming the universal default, compact object headers cutting heap memory by 22%, post-quantum TLS 1.3 key exchange, JFR data redaction for compliance, and structured concurrency reaching its seventh preview, delivering immediate performance gains and future-proof security for Java applications.
This article introduces Easy-Query, a Java ORM framework inspired by .NET's LINQ that enables strongly-typed, chainable query expressions for 90% of database scenarios, demonstrating queries, joins, subqueries, pagination, streaming, dynamic conditions, grouping, and encryption with generated SQL examples.
MySQL 9.0 introduces three major features: native JSON multi-valued indexes delivering 370x faster array queries, Parallel Query V2 with work-stealing achieving 7-8x speedups on analytical workloads, and an ML-based AI query optimizer that cuts index misselection from 12% to 2% and boosts complex query performance by 25-40%.
This article dissects MyBatis startup internals, explaining how Mapper interfaces and XML SQL are parsed into MappedStatement objects, the role of SqlSource in static vs dynamic SQL, the #{}/${} difference, and how JDK dynamic proxies enable interface method execution without implementation classes.
This article analyzes how GraalVM Native Image 23.0 and Spring Boot 3.5 enable millisecond cold starts, 80% smaller containers, and production-ready serverless Java across AWS, Alibaba Cloud, Tencent Cloud, and Azure — with benchmarks, migration steps, and pitfall solutions.
The author shares practical experience replacing OpenFeign with Spring's @HttpExchange during a Spring Boot 4 upgrade, demonstrating configuration simplification, authentication handling via RestClient interceptors, error mapping with defaultStatusHandler, and the decision to coexist both clients rather than force a full migration.
The article debunks the myth that try-catch hurts Java performance by analyzing JVM exception tables, bytecode, and running benchmarks under interpreted and compiled modes, showing negligible overhead when no exception is thrown and that JIT compilation eliminates even minor goto costs.
This article explains why EasyExcel was archived, introduces FastExcel as a rewrite, details its donation to Apache as Fesod, provides migration steps with code examples, compares performance against alternatives, and recommends Apache Fesod for new and existing projects due to its streaming API, low GC overhead, and Apache Foundation backing.
The article analyzes why Java virtual threads, despite promising million-concurrency with minimal code changes, see little production adoption due to pinning with synchronized, ThreadLocal memory pressure, incomplete framework support, and CPU-bound workload mismatch, while showing benchmarks where they excel in I/O-heavy services but migration costs deter legacy systems.
