线程优于可运行的优势
Possible Duplicate:
Java: “implements Runnable” vs. “extends Thread”
1)为什么Java语言同时提供Thread和Runnable? 2)线程比可运行的有什么优势(为什么Java无法提供可运行的) 3)我们可以睡个好觉，给它一个id等吗?
1) Why does Java language provide both Thread and Runnable? 2) What are the advantages of thread over runnable ( why couldnt Java just provide a runnable) 3) Can we make a runnable sleep, give it an id etc?
1..线程是一个类，当您说.start()时，您将创建一个thread of execution 称为Runnable的run()方法，使它执行任务到 thread of execution，然后start()方法快速返回.
1. Thread is a class, and when you say .start() you create a thread of execution which is attached to an Instance of Thread Class. Therun() method of Runnable is called making it execute the task on to the thread of execution, and the start() method returns quickly.
2..Runnable是分配给newly created thread of execution的task.
3..因此，没有Thread类，您将无法运行Runnable.