并发编程--01并发编程的基础_01并发编程基础-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_lindy/article/details/93196274

博客介绍了线程的状态，包括启动和终止方式，如start启动、stop已过时、interrupt优雅中断等，还提到通过指令方式控制线程。同时阐述了线程的安全性问题，有可见性、原子性和有序性问题，以及CPU高速缓存相关内容。

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线程的状态：

      1 NEW   初始状态，没有调用start方法   A thread that has not yet started is in this state.
   
     * 2 RUNNABLE  运行状态   A thread executing in the Java virtual machine is in this state.
    
     * 3 BLOCKED   阻塞  A thread that is blocked waiting for a monitor lock
     * 			等待阻塞  wait
     *         同步阻塞   synchronized
     * 			其他阻塞  sleep /  join  
    
     * 4 WAITING  等待  A thread that is waiting indefinitely for another thread to perform a particular action is in this state.
    
     * 5 TIMED_WAITING   时间等待 A thread that is waiting for another thread to perform an action for up to a specified waiting time is in tsis state.
 
     * 6 TERMINATED  终止  A thread that has exited is in this state.

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线程的启动和终止：
start native

stop – 过时，相当于 kill

interrupt 优雅中断

通过指令的方式 votatile Boolean isStop = false

Thread.interrupted(); 对设置的中断标识的线程进行复位

public static void main(String[] args) throws InterruptedException {
        Thread thread = new Thread(()->{
            while (true){
                boolean in = Thread.currentThread().isInterrupted();
                if(in){
                    System.out.println("before:"+in);
                    Thread.interrupted();       //设置复位
                    System.out.println("after:"+Thread.currentThread().isInterrupted());
                }
            }
        });

        thread.start();
        TimeUnit.SECONDS.sleep(1);
        thread.interrupt();
    }

线程的安全性问题：