对于程序员来说 Thread应该都不会陌生，具体的接口调用不是本篇的重点。Thread的基本概念及接口的使用：java多线程
下面将更多的从底层实现角度讲一下Thread。
Thread的声明如下：
class Thread implements Runnable Runnable 接口是个什么鬼？public interface Runnable { /** * When an object implementing interface <code>Runnable</code> is used * to create a thread, starting the thread causes the object's * <code>run</code> method to be called in that separately executing * thread. * <p> * The general contract of the method <code>run</code> is that it may * take any action whatsoever. * * @see java.lang.Thread#run() */ public abstract void run(); }