查看api可知道 Runnable 接口，只提供了run()方法。所以只實(shí)現(xiàn)了 Runnable 接口的類并不能啟動(dòng)線程。當(dāng)你再查看Thread的api時(shí)，有多個(gè)重載的構(gòu)造函數(shù)比如這個(gè)：?

public?Thread(Runnable?target,?String?name)；

啟動(dòng)線程只能用Thread里面的start() 方法。

Thread?actressThread?=?new?Thread(new?Actress(),"MsRunnable");
//?可寫成
Actress?actress?=?new?Actress();?
Thread?actressThread?=?new?Thread(actress,?"MsRunnable");
//?此時(shí)?actreeThread?調(diào)用的?start()?方法時(shí)，也就調(diào)用了?actress?中的?run()?方法.?
actressThread.start();