BlockingQueue的使用

一个线程从队列里取数据，一个线程往队列里添加数据

import java.util.concurrent.Exchanger;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ExchangerTest {

    public static void main(String[] args) {
        ExecutorService service = Executors.newCachedThreadPool();
        final Exchanger<String> exchanger = new Exchanger<String>();
        service.execute(new Runnable() {

            @Override
            public void run() {
                try {
                    String data1 = "zxx";
                    System.out.println("线程" + Thread.currentThread().getName()
                            + "正在把数据" + data1 + "换出去");
                    Thread.sleep((long) Math.random() * 10000);
                    
                    String data2=(String) exchanger.exchange(data1);
                    System.out.println("线程" + Thread.currentThread().getName()
                            + "换回的数据为" + data2);
                } catch (Exception e) {

                    e.printStackTrace();
                }
            }
        });

        service.execute(new Runnable() {

            @Override
            public void run() {
                try {
                    String data1 = "lhm";
                    System.out.println("线程" + Thread.currentThread().getName()
                            + "正在把数据" + data1 + "换出去");
                    Thread.sleep((long) Math.random() * 10000);
                    
                    String data2=(String) exchanger.exchange(data1);
                    System.out.println("线程" + Thread.currentThread().getName()
                            + "换回的数据为" + data2);
                } catch (Exception e) {

                    e.printStackTrace();
                }
            }
        });
    }
}

长度为1的阻塞队列实现同步通知

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;



public class BlockingQueueCondition {

    public static void main(String[] args) {
        ExecutorService service = Executors.newSingleThreadExecutor();
        final Business3 business = new Business3();
        service.execute(new Runnable(){

            public void run() {
                for(int i=0;i<50;i++){
                    business.sub();
                }
            }
            
        });
        
        for(int i=0;i<50;i++){
            business.main();
        }
    }

}

class Business3{
    BlockingQueue<Integer> subQueue = new ArrayBlockingQueue<Integer>(1);
    BlockingQueue<Integer> mainQueue = new ArrayBlockingQueue<Integer>(1);
    //这里是匿名构造方法，只要new一个对象都会调用这个匿名构造方法，它与静态块不同，静态块只会执行一次，
    //在类第一次加载到JVM的时候执行
    //这里主要是让main线程首先put一个，就有东西可以取，如果不加这个匿名构造方法put一个的话程序就死锁了
    {
        try {
            mainQueue.put(1);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
    public void sub(){
        try
        {
            mainQueue.take();
            for(int i=0;i<10;i++){
                System.out.println(Thread.currentThread().getName() + " : " + i);
            }
            subQueue.put(1);
        }catch(Exception e){

        }
    }
    
    public void main(){
        
        try
        {
            subQueue.take();
            for(int i=0;i<5;i++){
                System.out.println(Thread.currentThread().getName() + " : " + i);
            }
            mainQueue.put(1);
        }catch(Exception e){
        }        
    }
}