定义：当多个线程访问某个类时，不管运行时环境采用何种调度方式或者这些线程将如何交替执行，并且在主调代码中不需要任何额外的同步或协同，这个类都能表现出正确的行为，那么就称这个类是线程安全的。 无状态对象一定是线程安全的 延迟初始化的 ...

Cardiovascular disease is a term used to describe diseases of the heart and blood vessels. Some of the common types of cardiovascular disease include coronary artery disease, heart attack, and heart ...

Core Java – Daily Learning: A hands-on, daily-updated repository with practical Java programs on patterns, functions, arrays, OOP, and mini projects. Ideal for beginners and learners to practice, ...