采用線程實現“生產者-消費者”編程的基礎模型

源代碼

消費者代碼：
public class Consumer implements Runnable {BlockingQueue<Integer> blockingQueue;int n;CountDownLatch countDownLatch;public Consumer(BlockingQueue<Integer> blockingQueue, int n, CountDownLatch countDownLatch) {this.blockingQueue = blockingQueue;this.n = n;this.countDownLatch=countDownLatch;}@Overridepublic void run() {for(int i=0;i<n;i++){try {int cur=blockingQueue.take();isPrime(cur);/*   System.out.println("消費"+blockingQueue.size());*/} catch (InterruptedException e) {e.printStackTrace();}}System.out.println("消費者完成");countDownLatch.countDown();}int isPrime(int n){	//返回1表示判斷為質數，0為非質數，在此沒有進行輸入異常檢測double n_sqrt;if(n==2 || n==3) return 1;if(n%6!=1 && n%6!=5) return 0;n_sqrt=Math.floor(Math.sqrt((float)n));for(int i=5;i<=n_sqrt;i+=6){if(n%(i)==0 | n%(i+2)==0) return 0;}return 1;}}生產者代碼：
public class Producer implements Runnable{BlockingQueue<Integer> blockingQueue;int n;CountDownLatch countDownLatch;public Producer(BlockingQueue<Integer> blockingQueue, int n,CountDownLatch countDownLatch) {this.blockingQueue = blockingQueue;this.n = n;this.countDownLatch=countDownLatch;}@Overridepublic void run() {Random ra =new Random();for(int i=0;i<n;i++){try {blockingQueue.put(ra.nextInt(2000000000)+1);/*    System.out.println("生產"+blockingQueue.size());*/} catch (InterruptedException e) {e.printStackTrace();}}System.out.println("生產者完成");countDownLatch.countDown();}
}主類：
public class Model {public  static void excute(int producerNum,int consumerNum,int num,CountDownLatch countDownLatch){BlockingQueue<Integer> blockingQueue=new LinkedBlockingQueue<>(num);for(int i=0;i<producerNum;i++){new Thread(new Producer(blockingQueue,num/producerNum,countDownLatch)).start();}for(int i=0;i<consumerNum;i++){new Thread(new Consumer(blockingQueue,num/consumerNum,countDownLatch)).start();}}public static void main(String[] args) {CountDownLatch countDownLatch=new CountDownLatch(6);long s=System.currentTimeMillis();excute(2,4,1000000,countDownLatch);try {countDownLatch.await();} catch (InterruptedException e) {e.printStackTrace();}System.out.println((double) (System.currentTimeMillis()-s)/1000);}
}