java线程之三-----生产者消费者模式1

java线程之三-----生产者消费者模式1

https://blog.csdn.net/qq_41247433/article/details/79434202

1：使用 wait() 方式来实现生产者消费者模式

/**
 * 生产者与消费者模型
 */
public class ThreadForProducerAndConsumer {
    private static BoxForConsumerAndProducter box;
    public static void main(String[] args) {
        box = BoxForConsumerAndProducter.getInstance();
        Consumer consumer = new Consumer(box);
        Producter producter = new Producter(box);
        Thread consumerThread = new Thread(consumer);
        Thread producterThread = new Thread(producter);
        producterThread.start();
        consumerThread.start();
    }
}

/**
 * 生产者
 */
public class Producter implements Runnable {
    private BoxForConsumerAndProducter box;

    public Producter(BoxForConsumerAndProducter box) {
        this.box = box;
    }
    @Override
    public void run() {
        for(int i = 0; i < 10;i++) {
            System.out.println("Producter count = " + i);
            try {
                Thread.sleep(30);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            box.increace();
        }
    }
}

/**
 * 消费者模型
 * 
 */
public class Consumer implements Runnable {
    private BoxForConsumerAndProducter box;

    public Consumer(BoxForConsumerAndProducter box) {
        this.box = box;
    }
    @Override
    public void run() {
        for(int i = 0; i < 10;i++) {
            System.out.println("concumer count = " + i);
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            box.decreace();
        }
    }
}

/**
 * 生产者和消费者公用这个容器
 */
public class BoxForConsumerAndProducter {
    private int boxApple = 0;
    private static volatile BoxForConsumerAndProducter box;
    private static Object lock = new Object();

    private BoxForConsumerAndProducter() {
    }

    public static BoxForConsumerAndProducter getInstance() {
        if (box == null) {
            synchronized (lock) {
                if (box == null) {
                    box = new BoxForConsumerAndProducter();
                }
            }
        }
        return box;
    }

    /**
     * 向容器中生产增加数据
     */
    public void increace() {
        synchronized (box) {
            while (boxApple == 10) {
                try {
                    wait();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            boxApple++;
            box.notify();
            System.out.println("decreace 生产事件成功 boxApple = " + boxApple);
        }
    }

    /**
     * 向容器中消费较少数据
     */
    public void decreace() {
        synchronized (box) {
            while (boxApple ==0) {
                try {
                    wait();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            boxApple--;
            box.notify();
            System.out.println("decreace 消费事件成功 boxApple = " + boxApple);
        }
    }
}

D:\softInstall\jdk\bin\java.exe "-javaagent:D:\softInstall\javaee\IntelliJ IDEA 2020.1.3\lib\idea_rt.jar=59412:D:\softInstall\javaee\IntelliJ IDEA 2020.1.3\bin" -Dfile.encoding=UTF-8 -classpath D:\softInstall\jdk\jre\lib\charsets.jar;D:\softInstall\jdk\jre\lib\deploy.jar;D:\softInstall\jdk\jre\lib\ext\access-bridge-64.jar;D:\softInstall\jdk\jre\lib\ext\cldrdata.jar;D:\softInstall\jdk\jre\lib\ext\dnsns.jar;D:\softInstall\jdk\jre\lib\ext\jaccess.jar;D:\softInstall\jdk\jre\lib\ext\jfxrt.jar;D:\softInstall\jdk\jre\lib\ext\localedata.jar;D:\softInstall\jdk\jre\lib\ext\nashorn.jar;D:\softInstall\jdk\jre\lib\ext\sunec.jar;D:\softInstall\jdk\jre\lib\ext\sunjce_provider.jar;D:\softInstall\jdk\jre\lib\ext\sunmscapi.jar;D:\softInstall\jdk\jre\lib\ext\sunpkcs11.jar;D:\softInstall\jdk\jre\lib\ext\zipfs.jar;D:\softInstall\jdk\jre\lib\javaws.jar;D:\softInstall\jdk\jre\lib\jce.jar;D:\softInstall\jdk\jre\lib\jfr.jar;D:\softInstall\jdk\jre\lib\jfxswt.jar;D:\softInstall\jdk\jre\lib\jsse.jar;D:\softInstall\jdk\jre\lib\management-agent.jar;D:\softInstall\jdk\jre\lib\plugin.jar;D:\softInstall\jdk\jre\lib\resources.jar;D:\softInstall\jdk\jre\lib\rt.jar;D:\codeResource\javaee\javaee\out\production\javaee day01Thread.multi.thread.ThreadForProducerAndConsumer
Producter count = 0
concumer count = 0
decreace 生产事件成功 boxApple = 1
Producter count = 1
decreace 生产事件成功 boxApple = 2
Producter count = 2
decreace 生产事件成功 boxApple = 3
Producter count = 3
decreace 生产事件成功 boxApple = 4
Producter count = 4
decreace 生产事件成功 boxApple = 5
Producter count = 5
decreace 生产事件成功 boxApple = 6
Producter count = 6
decreace 生产事件成功 boxApple = 7
Producter count = 7
decreace 生产事件成功 boxApple = 8
Producter count = 8
decreace 生产事件成功 boxApple = 9
Producter count = 9
decreace 生产事件成功 boxApple = 10
decreace 消费事件成功 boxApple = 9
concumer count = 1
decreace 消费事件成功 boxApple = 8
concumer count = 2
decreace 消费事件成功 boxApple = 7
concumer count = 3
decreace 消费事件成功 boxApple = 6
concumer count = 4
decreace 消费事件成功 boxApple = 5
concumer count = 5
decreace 消费事件成功 boxApple = 4
concumer count = 6
decreace 消费事件成功 boxApple = 3
concumer count = 7
decreace 消费事件成功 boxApple = 2
concumer count = 8
decreace 消费事件成功 boxApple = 1
concumer count = 9
decreace 消费事件成功 boxApple = 0