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public class App { private int num; /** * 生产 */ public void product() { try { // 生产耗时 Thread.sleep(1000); synchronized (this) { while (num >= 100) { wait(); } num++; System.out.println("生产"); System.out.println("库存量:" + num); notifyAll(); } } catch (InterruptedException e) { e.printStackTrace(); } } /** * 消费 */ public void sell() { try { // 卖出耗时 Thread.sleep(500); synchronized (this) { while (num <= 0) { wait(); } num--; System.out.println("卖出"); System.out.println("库存量:" + num); notifyAll(); } } catch (InterruptedException e) { e.printStackTrace(); } } public static void main(String[] args) throws Exception { App app = new App(); Runnable product = new Runnable() { @Override public void run() { while (true) { app.product(); } } }; Runnable sell = new Runnable() { @Override public void run() { while (true) { app.sell(); } } }; for (int i = 0; i < 5; i++) { System.out.println("投产"); new Thread(product).start(); } for (int i = 0; i < 10; i++) { System.out.println("销售"); new Thread(sell).start(); } }} import java.util.concurrent.ArrayBlockingQueue;import java.util.concurrent.BlockingQueue;import java.util.concurrent.atomic.AtomicInteger;public class App { private BlockingQueue blockingQueue=new ArrayBlockingQueue<>(100); private AtomicInteger atomicInteger=new AtomicInteger(); /** * 生产 */ public void product() { try { // 生产耗时 Thread.sleep(1000); blockingQueue.offer(atomicInteger.incrementAndGet()); System.out.println("工厂"+Thread.currentThread().getName()+"生产\n库存量:" + blockingQueue.size()); } catch (InterruptedException e) { e.printStackTrace(); } } /** * 消费 */ public void sell() { try { // 卖出耗时 Thread.sleep(500); System.out.println("消费者"+Thread.currentThread().getName()+"购买"+blockingQueue.take()+"号商品\n库存量:" + blockingQueue.size()); } catch (InterruptedException e) { e.printStackTrace(); } } public static void main(String[] args) throws Exception { App app = new App(); Runnable product = new Runnable() { @Override public void run() { while (true) { app.product(); } } }; Runnable sell = new Runnable() { @Override public void run() { while (true) { app.sell(); } } }; for (int i = 0; i < 3; i++) { System.out.println("投产"); new Thread(product).start(); } for (int i = 0; i < 5; i++) { System.out.println("销售"); new Thread(sell).start(); } }} import java.util.concurrent.locks.Condition;import java.util.concurrent.locks.ReentrantLock;public class App { private ReentrantLock lock = new ReentrantLock(); private final Condition notFull = lock.newCondition(); private final Condition notEmpty = lock.newCondition(); private int num = 0; public void product() { try { Thread.sleep(1000); lock.lock(); while (num > 100) { notFull.await(); } num++; System.out.println("工厂" + Thread.currentThread().getName() + "生产\n库存：" + num); notEmpty.signalAll(); } catch (Exception e) { e.printStackTrace(); } finally { lock.unlock(); } } public void sell() { try { Thread.sleep(800); lock.lock(); while (num <= 0) { notEmpty.await(); } num--; System.out.println("顾客" + Thread.currentThread().getName() + "购买\n库存：" + num); notFull.signalAll(); } catch (Exception e) { e.printStackTrace(); } finally { lock.unlock(); } } public static void main(String[] args) { App app = new App(); for (int i = 0; i < 10; i++) { new Thread(new Runnable() { @Override public void run() { while (true) { app.product(); } } }).start(); } for (int i = 0; i < 5; i++) { new Thread(new Runnable() { @Override public void run() { while (true) { app.sell(); } } }).start(); } }} 转载地址：http://upvj.baihongyu.com/