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Java 最常见的面试题：在 java 程序中怎么保证多线程的运行安全？

线程安全在三个方面体现：原子性：提供互斥访问，同一时刻只能有一个线程对数据进行操作，（atomic,synchronized）；可见性：一个线程对主内存的修改可以及时地被其他线程看到，（synchronized,volatile）；有序性：一个线程观察其他线程中的指令执行顺序，由于指令重排序，该观察...

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Java刷题知识点之什么是进程、什么是线程、什么是多线程、多线程的好处和弊端、多线程的创建方式、JVM中的多线程解析、多线程运行图解

什么是进程？　　正在进行中的程序(直译)。什么是线程？　　就是进程中一个负责程序执行的控制单元(执行路径)。　　见一个进程中可以多执行路径，称之为多线程。什么是多线程？　　一个进程中至少要有一个线程。　　开启多个线程是为了同时运行多...

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