How to use Java multithread to realize train ticketing system

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Java multithreaded train ticketing (the difference between Thread and Runnable)

There are two ways to implement multithreading in java.

Inheriting Thread class to implement Runnable interface

Inherits the class of the Thread class, uses the object .start () to start the thread to implement the class of the Runnable class, and uses new Thread (the implementation class of new Runnable ()). Start () to start

Here is a classic example that works well with a class that implements the Runnable interface.

A simple analysis of train ticketing:

1. The number of votes is shared, so you can't buy a ticket multiple times. two。 At the same time, there are multiple ticket outlets selling tickets, that is, multiple threads exist. 3. When a ticket office is selling tickets, other ticket outlets cannot intervene, and synchronous locks can be used here.

The code is as follows:

Test class

Public class TicketsTest {public static void main (String [] args) {SakeTickets st = new SakeTickets (); Thread [] t = new Thread [3]; for (int I = 0; I

< t.length; i++) { t[i] = new Thread(st,"售票口"+(i+1)); t[i].start(); } } } 实现Runnable接口的售票类 public class SakeTickets implements Runnable{private int totalTickets =200;public void run(){ while(totalTickets>

0) sale ();} public void sale () {synchronized (this) {String name = Thread.currentThread () .getName (); if (totalTickets==0) System.out.println (name+ "tickets are sold out.") ; else {totalTickets--; try {Thread.sleep (57);} catch (InterruptedException e) {e.printStackTrace ();} System.out.printf (name+ "sold one ticket, left:%-3D.\ n", totalTickets);}

The difference between Thread and Runnable

If a class inherits Thread, it is not suitable for resource sharing. However, if you implement the Runable interface, it is easy to achieve resource sharing.

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