1、Runnable是一个接口，当实现该接口时需要复用run方法，在run方法中实现自己的逻辑。
2、Thread是一个类，它其实实现了Runnable方法，也就是说当你通过new 一个Thread得到一个线程实例时，其实就是重写runnable里面的run方法。当你通过实现runnable创建一个线程实例时，你需要将runnable实例传递一个thread，然后通过.start开启线程。
3、Runnable可以线程同步，但是Thread不可以线程同步，例如一共有10张票，你可以开启3个线程同时卖票，如果你通过继承thread创建一个卖票的类，实例化3个线程会各自卖10张票，一共就卖出了30张，当时你通过实现runnable所创建的卖票类，只需要实例化一个对象，将一个对象传递给三个thread，然后开启三个线程，你会发现三个线程一共只会卖10张。
4、以下是卖票的代码
package com.shine.test;
/**
* 通过继承thread的卖票类
* @author ASUS
*
*/
public class MyThread extends Thread {
;
boolean flag = true;
public MyThread(String string) {
this.setName(string);
}
@Override
public void run() {
while(flag){
saleTick();
}
}
public void saleTick() {
){
ticks--;
System.out.println(Thread.currentThread().getName()+":"+ticks);
}else{
flag = false;
}
}
}
package com.shine.test;
/**
* 通过实现Runnable的卖票类
* @author ASUS
*
*/
public class MyRunnable implements Runnable {
;
boolean flag = true;
@Override
public void run() {
while(flag){
saleTick();
}
}
public void saleTick() {
){
ticks--;
System.out.println(Thread.currentThread().getName()+":"+ticks);
}else{
flag = false;
}
}
}
package com.shine.test;
public class Test {
/**测试
* @param args
*/
public static void main(String[] args) {
MyThread myThread1 = new MyThread("thread1");
MyThread myThread2 = new MyThread("thread2");
MyThread myThread3 = new MyThread("thread3");
myThread1.start();
myThread2.start();
myThread3.start();
MyRunnable myRunnable = new MyRunnable();
Thread runnable1 = new Thread(myRunnable);
Thread runnable2 = new Thread(myRunnable);
Thread runnable3 = new Thread(myRunnable);
runnable1.setName("runnable1");
runnable2.setName("runnable2");
runnable3.setName("runnable3");
runnable1.start();
runnable2.start();
runnable3.start();
}
}
结果：thread1: thread1: thread1: thread1: thread1: thread1: thread1: thread1: thread1: thread1: thread2: thread2: thread2: thread2: thread2: thread2: thread2: thread2: thread2: thread2: thread3: runnable1: runnable1: runnable1: runnable1: runnable1: runnable1: runnable1: runnable1: runnable1: runnable1: thread3: thread3: thread3: thread3: thread3: thread3: thread3: thread3: thread3:
由于系统自身的线程选择问题 全部由runnable1完成了卖票 但总共只卖出了10张 thread的则卖出了30张