2019獨角獸企業重金招聘Python工程師標準>>>

一、利用Object對象是wait和notify\notifyAll

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package com.jv.parallel.consumerandproducer.objectwait;public class Car {private volatile int flag = 0;public void showConsumer(){System.out.println("I am a Car ! 我已經被消費");}public void showProducer(){System.out.println("I am a Car ! 我已經被生產");}public int getFlag(){return flag;}public void setFlag(int flag){this.flag=flag;} }

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package com.jv.parallel.consumerandproducer.objectwait;public class Consumer extends Thread{private Car car;public Consumer() {// TODO Auto-generated constructor stub}public Consumer(Car car){this.car = car;}@Overridepublic void run() {while(true){synchronized(car){try {while(car.getFlag()==0){car.wait();}car.setFlag(0);car.showConsumer();car.notifyAll();Thread.currentThread().sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}}}} }

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package com.jv.parallel.consumerandproducer.objectwait;public class Producer extends Thread{private Car car;public Producer(){}public Producer(Car car){this.car = car;}public void run() {while(true){synchronized(car){try {while(car.getFlag()==1){car.wait();}car.setFlag(1);car.showProducer();car.notifyAll();Thread.currentThread().sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}}}} }

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package com.jv.parallel.consumerandproducer.objectwait;public class Test {public static void main(String[] args) {Car car = new Car();Consumer cs = new Consumer(car);Producer pd = new Producer(car);cs.start();pd.start();} }

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二、使用Lock.Condition

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package com.jv.parallel.consumerandproducer.lock;public class Car {private volatile int flag = 0;public void showConsumer(){System.out.println("I am a Car ! 我已經被消費");}public void showProducer(){System.out.println("I am a Car ! 我已經被生產");}public int getFlag(){return flag;}public void setFlag(int flag){this.flag=flag;} } package com.jv.parallel.consumerandproducer.lock;import java.util.concurrent.locks.Condition; import java.util.concurrent.locks.Lock;public class Consumer implements Runnable{private Car car;private Lock lock;private Condition cd ;public Consumer() {// TODO Auto-generated constructor stub}public Consumer(Car car,Lock lock,Condition cd){this.car=car;this.lock=lock;this.cd=cd;}@Overridepublic void run() {while(true){lock.lock();try{while(car.getFlag()==0){cd.await();}car.setFlag(0);car.showConsumer();cd.signal();Thread.currentThread().sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}finally{lock.unlock();}}} } package com.jv.parallel.consumerandproducer.lock;import java.util.concurrent.locks.Condition; import java.util.concurrent.locks.Lock;public class Producer implements Runnable{private Car car;private Lock lock;private Condition cd ;public Producer() {// TODO Auto-generated constructor stub}public Producer(Car car,Lock lock,Condition cd){this.car=car;this.lock=lock;this.cd=cd;}@Overridepublic void run() {while(true){lock.lock();try{while(car.getFlag()==1){cd.await();}car.setFlag(1);car.showProducer();cd.signal();Thread.currentThread().sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}finally{lock.unlock();}}} } package com.jv.parallel.consumerandproducer.lock;import java.util.concurrent.locks.Condition; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock;public class Test {public static void main(String[] args) {Lock lock = new ReentrantLock();Car car = new Car();Condition cd = lock.newCondition();Thread t1 = new Thread(new Consumer(car,lock,cd));Thread t2 = new Thread(new Producer(car,lock,cd));t1.start();t2.start();} }

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三、使用阻塞隊列

設置阻塞隊列長度為1，使用put和take方法（可阻塞）

package com.jv.consumerandproducer.queue;import java.util.concurrent.ArrayBlockingQueue; import java.util.concurrent.BlockingQueue;public class TestQueue { public static void main(String[] args) {BlockingQueue<Car> queue = new ArrayBlockingQueue<Car>(1);Consumer c = new Consumer(queue);Producer p = new Producer(queue);Thread t1 = new Thread(c);Thread t2 = new Thread(p);t1.start();t2.start();System.out.println("main haved end");}} class Consumer implements Runnable{BlockingQueue<Car> queue;public Consumer(BlockingQueue<Car> queue){this.queue=queue;}@Overridepublic void run() {Car c ;while(true){try {c = queue.take();c.showConsumer();Thread.currentThread().sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}}}}class Producer implements Runnable{BlockingQueue<Car> queue;public Producer(BlockingQueue<Car> queue){this.queue=queue;}@Overridepublic void run() {Car c ;while(true){try{c = new Car();queue.put(c);c.showProducer();Thread.currentThread().sleep(1000);}catch (InterruptedException e) {e.printStackTrace();}}}} package com.jv.consumerandproducer.queue;public class Car {private volatile int flag = 0;public void showConsumer(){System.out.println("I am a Car ! 我已經被消費");}public void showProducer(){System.out.println("I am a Car ! 我已經被生產");}public int getFlag(){return flag;}public void setFlag(int flag){this.flag=flag;} }

四、利用FutureTask實現

? ? 還需要研究它的內部實現原理

? ? 代碼待補充

五、使用信號量實現

????其內部原理還是利用被包裝過的同步器的condition對象實現

? ? 代碼待補充

六、使用Redis列表數據類型實現

? ? 因為它具有可阻塞特性。

? ? 代碼待補充

轉載于:https://my.oschina.net/u/3049601/blog/912986

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