线程

线程的中断使用场景是线程一直执行，不会自己停止

1.自定义一个类继承thread。&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;2.然后重写run方法。<br>&nbsp;3.new这个对象。<br>4.执行start方法线程最终调用的是native修饰的start0方法，进入就绪状态向jvm发送指令，通过系统调度算法，cpu分配时间片给线程，接着java调度run方法。

1.自定义一个类实现runable，形成一个任务。<br>2.重写run方法。<br>3.创建new 这个类对象。<br>3.通过thread去执行这个类任务。<br>4.同thread4

和runnable类似，不同之处有如下：<br>1.callable可以自己抛出异常，runnable只能手动捕获。<br>2.callable有返回值<br>3.callable的任务只能由线程池去调用。

thread和runnable本质上一样，但是runnable可以更好的解耦，因为实现runable的类只是线程任务，而线程和这个任务是相互独立的