還有一點區(qū)別，實現(xiàn)Runnable結(jié)構(gòu)去創(chuàng)建線程類時，可以方便的實現(xiàn)多線程處理類內(nèi)共享變量。例如：

class?MyThread1?implements?Runnable{

????private?int?ticketsCont?=?5;????//共享變量

????@Override
????public?void?run()?{
????????while(ticketsCont?>?0)?{
????????????ticketsCont--;
????????????System.out.println(Thread.currentThread().getName()?+?"買了一張票，剩余票數(shù)：?"?+?ticketsCont);
????????}
????}
}

public?class?TicketsRunnable?{
????public?static?void?main(String[]?args)?{
????????MyThread1?myThread1?=?new?MyThread1();
????????Thread?t1?=?new?Thread(myThread1,?"A");
????????Thread?t2?=?new?Thread(myThread1,?"B");
????????Thread?t3?=?new?Thread(myThread1,?"C");
????????t1.start();
????????t2.start();
????????t3.start();
????}
}

沒什么區(qū)別 , Thread類本質(zhì)上也是實現(xiàn)了Runnable接口 , 由于類單繼承以及接口多繼承 , 推薦用Runnable接口 , 因為可能你的類需要繼承別的類 , 不管是通過繼承類還是實現(xiàn)接口來實現(xiàn)多線程 , 最終都是通過Thread的對象的API來控制線程的