A full Java learning collection: 14-day beginner track, 10-day intermediate track, and a professional-level advanced section (Backend, Android, Concurrency, Trending).

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

JVM内存模型远不止"堆和栈"。5个运行时数据区域各有职责，程序计数器记录执行位置，虚拟机栈管理方法调用，堆存放对象，方法区存类信息。加上类加载的双亲委派、垃圾回收的可达性分析和分代收集，这才是JVM原理的完整拼图。 一、一个被问住的真实场景 ...