可阻塞队列
(1) 队列包含固定长度的队列和不固定长度的队列。
(2)什么是可阻塞队列,阻塞队列的作用与实际应用,阻塞队列的实现原理
ArrayBlockingQueue
看ArrayBlockingQueue类的帮助文档,其中有各个方法的区别对比的表格
只有put方法和take方法才具有阻塞功能
(3)用3个空间的队列来演示阻塞队列的功能和效果
(4)用两个具有1个空间的队列来实现同步通知的功能
(5)阻塞队列与Semaphore有些相似,但也不同。阻塞队列是一方存放数据,另一方释放数据,Semaphore
通常则是由同一方设置和释放信号量
可用阻塞队列实现线程通信
package com.ronbay.thread.timer; import java.util.concurrent.ArrayBlockingQueue; import java.util.concurrent.BlockingQueue; public class BlockingQueueCommunication { public static void main(String[] args) { final Business business = new Business(); new Thread(new Runnable() { @Override public void run() { for (int i = 0; i < 50; i++) { business.sub(i); } } }).start(); for (int i = 0; i < 50; i++) { business.main(i); } } static class Business{ BlockingQueuequeue1 = new ArrayBlockingQueue (1); BlockingQueue queue2 = new ArrayBlockingQueue (1); //匿名构造方法,运行时机在任何构造方法之前,创建几次对象就调用几次 { try { System.out.println("dvsdvsdvsxxxasdcasfas"); queue2.put(1); } catch (Exception e) { } } public void sub(int i ){ try { queue1.put(1); } catch (InterruptedException e1) { e1.printStackTrace(); } for (int j = 1; j <= 10; j++) { System.out.println("sub thread sequence of " + j + ",loop of " + i); } try { queue2.take(); } catch (InterruptedException e) { e.printStackTrace(); } } public void main(int i){ try { queue2.put(1); } catch (InterruptedException e) { e.printStackTrace(); } for (int j = 1; j <= 100; j++) { System.out.println("main thread sequence of " + j + ",loop of " + i); } try { queue1.take(); } catch (InterruptedException e) { e.printStackTrace(); } } } }