匿名内部类介绍：

用Runnable模拟实现共享堆内存变量

import java.lang.Thread;public class SellTicket {         /**        * 用Runnable模拟实现共享堆内存变量     * @param args       */        public static void main(String[] args) {      Runnable  runnable = new Runnable() {        private int ticket = 50;        public void run() {          while (ticket > 0) {            ticket--;            System.out.println(Thread.currentThread().getName()+"当前票数为：" + ticket);          }        }      };        new Thread(runnable).start();        new Thread(runnable).start();    }}

用Thread模拟实现共享堆内存变量

public class SellTicket2 {         /**        * 用Thread模拟实现共享堆内存变量     * @param args       */        public static void main(String[] args) {      Thread mt = new Thread(){        private int ticket = 50;        public void run() {          while (ticket > 0) {            ticket--;            System.out.println(Thread.currentThread().getName()+"当前票数为：" + ticket);          }        }      };      new Thread(mt).start();;      new Thread(mt).start();;    }}

Runnable和Thread实现多线程，共同点是变量可以共享，区别是用借口实现更加灵活，继承只能单继承有局限性。