实现线程的两种方式

      实现线程的两种方式：继承Thread类和实现Runnable接口。

      两种方式差异：实现Runnable接口避免单继承的局限性。

     

      继承方式案例：

package com.neutron.thread.demo;/** * 继承方式 * 1.继承Thread类 * 2.重写Thread的run方法，将自定义的方法存储在run方法中 * 3.调用线程的start方法，启动线程，调用run方法 *  * 多个线程取得cpu的执行权，cpu执行到谁，谁就运行。多线程具有随机性，谁抢到就执行谁，执行时间不确定。 * Thread类用于描述线程，run方法用于存储线程要执行的代码。 * @author zhanght * */public class Ticket extends Thread {private static int ticket = 15;@Overridepublic void run() {while(true) {if (ticket > 0) {System.out.println(this.getName() + " " + ticket--);}}}public static void main(String[] args) {Ticket ticket = new Ticket();Ticket ticket2 = new Ticket();Ticket ticket3 = new Ticket();ticket.start();ticket2.start();ticket3.start();}/* *  Thread-1 15    Thread-2 14    Thread-0 14    Thread-2 12    Thread-2 10    Thread-2 9    Thread-2 8    Thread-2 7    Thread-2 6    Thread-1 13    Thread-2 5    Thread-0 11    Thread-2 3    Thread-1 4    Thread-2 1    Thread-0 2 */}

       实现接口方式：

package com.neutron.thread.demo;/** * 1.定义类实现Runnable接口 * 2.重写Runnable接口中的run方法，将线程要运行的代码放在该run方法中。 * 3.通过Thread类建立线程对象 * 4.将实现Runnable接口的子类对象作为实际参数传递给Thread类的构造方法中。 *   要想线程执行指定对象的run方法，那么该对象必须实现Runnable接口 * 5.调用Thread类的start方法，开启线程并且调用实现Runnable接口对象的run方法。 * @author zhanght * */public class Tickets implements Runnable {private int ticket = 30;@Overridepublic void run() { while (true) { if (ticket > 0) { System.out.println(Thread.currentThread().getName() + " " + ticket--); } }}public static void main(String[] args) {Tickets t1 = new Tickets();new Thread(t1).start();new Thread(t1).start();new Thread(t1).start();}/* *  Thread-0 30Thread-0 29Thread-0 28Thread-0 27Thread-0 26Thread-1 25Thread-1 23Thread-1 22Thread-1 21Thread-1 20Thread-1 19Thread-1 18Thread-1 17Thread-1 16Thread-1 15Thread-1 14Thread-1 13Thread-1 12Thread-1 11Thread-1 10Thread-1 9Thread-1 8Thread-1 7Thread-1 6Thread-1 5Thread-1 4Thread-1 3Thread-1 2Thread-1 1Thread-0 24 */}