今天有朋友問我一道面試題，有5個人搶5個紅包，可重復搶，用多線程程序實現，實現方式有多種，分享一下我的思路：應用了阻塞隊列的特性。
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/** * Created by zhanglinqiang on 2016/6/23. */public class MyTest { public static void main(String[] args) throws InterruptedException { LinkedBlockingQueue<LuckyMoney> luckyMoneys = new LinkedBlockingQueue<>(); List<FutureTask> futureTasks = new ArrayList<>(); //準備搶紅包 for (int i = 0; i < 5; i++) { FutureTask<Object> futureTask = new FutureTask<>(new CatchLuckMoney(luckyMoneys, "name" + i), null); new Thread(futureTask,"name"+i).start(); futureTasks.add(futureTask); } Thread.sleep(5);//確保搶紅包線程準備就緒 Random random = new Random(100); //發5個紅包 for (int i = 0; i < 5; i++) { luckyMoneys.put(new LuckyMoney("紅包"+i, random.nextInt(100)+1)); } //等到紅包搶完 while (!luckyMoneys.isEmpty()){ Thread.sleep(1); } //終止搶紅包線程 for (FutureTask futureTask : futureTasks) { futureTask.cancel(true); } } } class CatchLuckMoney implements Runnable { public CatchLuckMoney(LinkedBlockingQueue<LuckyMoney> luckyMoneys, String name) { this.luckyMoneys = luckyMoneys; this.name = name; } private LinkedBlockingQueue<LuckyMoney> luckyMoneys; private String name; @Override public void run() { while (!Thread.currentThread().isInterrupted()) { LuckyMoney redPackage = null; try { redPackage = luckyMoneys.take(); } catch (InterruptedException e) { // e.printStackTrace(); break; } System.out.println(name + "搶到了-->" + redPackage); luckyMoneys.remove(redPackage); } System.out.println("end>>>>>>>>>>>>>>>>>>>>>>>>>>>>"+Thread.currentThread().getName()); } } class LuckyMoney { public LuckyMoney(String name, Integer money) { this.name = name; this.money = money; } private String name; private Integer money; @Override public String toString() { return "LuckyMoney{" + "name='" + name + '\'' + ", money=" + money + '}'; } } |
運行效果:
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Connected to the target VM, address: '127.0.0.1:8869', transport: 'socket'name3搶到了-->LuckyMoney{name='紅包0', money=16} name4搶到了-->LuckyMoney{name='紅包3', money=89} name0搶到了-->LuckyMoney{name='紅包2', money=75} name1搶到了-->LuckyMoney{name='紅包1', money=51} name3搶到了-->LuckyMoney{name='紅包4', money=92} end>>>>>>>>>>>>>>>>>>>>>>>>>>>>name0 end>>>>>>>>>>>>>>>>>>>>>>>>>>>>name4 end>>>>>>>>>>>>>>>>>>>>>>>>>>>>name3 Disconnected from the target VM, address: '127.0.0.1:8869', transport: 'socket'end>>>>>>>>>>>>>>>>>>>>>>>>>>>>name1 end>>>>>>>>>>>>>>>>>>>>>>>>>>>>name2 Process finished with exit code 0 |
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原文鏈接：http://blog.csdn.net/u011411069/article/details/52503835
