Multithreaded first experience in Java

This is a mock-up of station ticketing, where multiple ticketing staff sell a high-speed rail (G250) at the same time. ), the basic guarantee for ticket sales is 2 points:

1. Tickets cannot be sold more than the predetermined limit.

2. Tickets with the same seat cannot be sold.

Beginner Java, there are inappropriate places everyone crossing please advise ~

The code is as follows:

 PackageThreadjava; Public classThreadTest4 { Public Static voidMain (string[] args) {//TODO Auto-generated method stubs//Limited total of 100 votesSeller Seller =NewSeller (100); //Open Three-window ticketingWorker W1 =NewWorker (seller); Worker W2=NewWorker (seller); Worker W3=NewWorker (seller); }    }//the machine that prints the ticket, as the server can connect multiple clients to run usingclassSeller {Private int[] tickets; Private intSold_line;  PublicSeller (intticket_total) {         This. Tickets =gettickets (ticket_total);  This. Sold_line =Ticket_total; }        //This method is an exclusive method whereby only one thread is allowed to call at the same time//is also the main implementation part of Java multithreading for synchronous operation     Public synchronized intSell () {if( This. sold_line! = 0){            intTicket_pos = (int) (Math.random () * This. Sold_line); intTicket = This. Tickets[ticket_pos];  This. Sold_line = This. sold_line-1; Swap ( This. Tickets, Ticket_pos, This. Sold_line); returnticket; }Else{            return-1; }    }        Private Static voidSwapint[] A,intXinty) {        inttemp =A[x]; A[X]=A[y]; A[y]=temp; }        Private Static voidShfulle (int[] a) {intx, y;  for(x=0; x<a.length; x + +) {y= (int) (Math.random () * (x+1));        Swap (A, x, y); }    }        Private Static int[] Gettickets (intTotal ) {        inti; int[] A =New int[Total];  for(i=0; i<total; i++) {A[i]=i;        } Shfulle (a); returnA; }}//The ticket operator is activated and the ticket is opened immediately. Haha, really dedicated ~classWorkerextendsThread {Private Static intThreadID = 0; PrivateSeller Tickor;  PublicWorker (Seller Seller) {Super("Ticket Seller NO." + (+ +)ThreadID));  This. Tickor =seller;  This. Start (); }         Public voidrun () { while(true){            intTicket = This. Tickor.sell (); if(Ticket = =-1) {System.out.println ( This. GetName () + ", sold out.");  Break; }Else{System.out.println ( This. GetName () + ", Get ticket:" +ticket); }        }    }}

Result of the ticket:

Ticket Seller, Get ticket:59Ticket Seller NO.1, Get ticket:41Ticket Seller NO.1, Get ticket:67Ticket Seller NO.2, Get ticket:63Ticket Seller NO.2, Get ticket:87Ticket Seller NO.2, Get ticket:23Ticket Seller NO.1, Get ticket:80Ticket Seller NO.2, Get ticket:36Ticket Seller NO.2, Get ticket:20Ticket Seller NO.3, Get Ticket:9Ticket Seller NO.1, Get Ticket:6Ticket Seller NO.3, Get ticket:81Ticket Seller NO.2, Get ticket:82Ticket Seller NO.3, Get ticket:38Ticket Seller NO.1, Get ticket:19Ticket Seller NO.3, Get ticket:26Ticket Seller NO.2, Get Ticket:1Ticket Seller NO.3, Get ticket:84Ticket Seller NO.1, Get ticket:51Ticket Seller NO.3, Get ticket:89Ticket Seller NO.2, Get ticket:31Ticket Seller NO.3, Get Ticket:2Ticket Seller NO.1, Get ticket:34Ticket Seller NO.3, Get ticket:78Ticket Seller NO.2, Get Ticket:11Ticket Seller NO.3, Get ticket:83Ticket Seller NO.1, Get ticket:73Ticket Seller NO.3, Get ticket:61Ticket Seller NO.2, Get ticket:56Ticket Seller NO.3, Get ticket:68Ticket Seller NO.1, Get Ticket:16Ticket Seller NO.3, Get ticket:48Ticket Seller NO.2, Get ticket:18Ticket Seller NO.3, Get Ticket:4Ticket Seller NO.1, Get ticket:49Ticket Seller NO.1, Get ticket:53Ticket Seller NO.1, Get ticket:85Ticket Seller NO.1, Get Ticket:13Ticket Seller NO.1, Get ticket:57Ticket Seller NO.3, Get ticket:93Ticket Seller NO.3, Get ticket:42Ticket Seller NO.3, Get ticket:46Ticket Seller NO.3, Get ticket:44Ticket Seller NO.3, Get ticket:58Ticket Seller NO.3, Get ticket:70Ticket Seller NO.3, Get ticket:33Ticket Seller NO.3, Get ticket:76Ticket Seller NO.3, Get ticket:47Ticket Seller NO.3, Get ticket:92Ticket Seller NO.3, Get ticket:55Ticket Seller NO.3, Get ticket:75Ticket Seller NO.3, Get ticket:96Ticket Seller NO.3, Get ticket:77Ticket Seller NO.3, Get ticket:45Ticket Seller NO.3, Get ticket:28Ticket Seller NO.3, Get ticket:88Ticket Seller NO.3, Get ticket:72Ticket Seller NO.3, Get Ticket:8Ticket Seller NO.3, Get Ticket:10Ticket Seller NO.3, Get ticket:62Ticket Seller NO.3, Get ticket:24Ticket Seller NO.3, Get ticket:86Ticket Seller NO.3, Get ticket:97Ticket Seller NO.3, Get Ticket:5Ticket Seller NO.3, Get ticket:21Ticket Seller NO.3, Get ticket:0Ticket Seller NO.3, Get Ticket:7Ticket Seller NO.3, Get ticket:22Ticket Seller NO.3, Get ticket:54Ticket Seller NO.3, Get ticket:98Ticket Seller NO.3, Get ticket:95Ticket Seller NO.3, Get ticket:52Ticket Seller NO.3, Get ticket:66Ticket Seller NO.3, Get Ticket:3Ticket Seller NO.3, Get ticket:50Ticket Seller NO.3, Get ticket:27Ticket Seller NO.3, Get ticket:40Ticket Seller NO.3, Get ticket:74Ticket Seller NO.2, Get ticket:25Ticket Seller NO.2, Get ticket:91Ticket Seller NO.3, Get ticket:94Ticket Seller NO.3, Get ticket:71Ticket Seller NO.3, Get ticket:65Ticket Seller NO.3, Get ticket:60Ticket Seller NO.3, Get ticket:29Ticket Seller NO.3, Get ticket:35Ticket Seller NO.3, Get ticket:90Ticket Seller NO.3, Get ticket:43Ticket Seller NO.3, Get ticket:39Ticket Seller NO.3, Get ticket:69Ticket Seller NO.3, Get ticket:37Ticket Seller NO.3, Get ticket:14Ticket Seller NO.3, Get ticket:99Ticket Seller NO.3, Get ticket:32Ticket Seller NO.3, Get Ticket:12Ticket Seller NO.3, Get ticket:64Ticket Seller NO.3, Get ticket:30Ticket Seller NO.3, Get ticket:79Ticket Seller No.3 , sold out. Ticket Seller NO.1, Get ticket:15Ticket Seller , sold out. Ticket Seller NO.2, Get ticket:17Ticket Seller No.2, sold out.

Reference article: http://www.cnblogs.com/vamei/archive/2013/04/15/3000898.html

Multithreaded first experience in Java