Multithreading: Thread creation, lifecycle, synchronization, and thread safety. Executor Service, Callable, Future, and handling concurrency. Implement core Java programs that use all OOP principles.

Specify correct JVM environment for Android builds when using the Gradle plugin. Avoid recomputing the size of a parameter list for performance reasons after measuring the significant impact. Correct ...

很多同学只学会了「加注解」，却不懂Spring异步AOP底层、线程池选型差异、任务超时控制、跨线程上下文复制、事务隔离边界。 在后端开发中，@Async是使用率最高的异步方案，但线上事故频发：接口偶发OOM、链路追踪ID丢失、异步任务静默失败、同类内部调用 ...