Java多線程之生產者(Producer)和消費者(Consumer)

Producer生產者顧名思義就是生產數據的線程,Consumer消費者就是使用數據的線程。能夠有多個生產者,也能夠有多個消費者,當生產者和消費者都是一個的時候,又叫作管道Pipe Pattern。ide

下面簡單寫了個例子,一個線程加1,一個線程減1,一個生產者、一個消費者,生產者用來加1,消費者用來減1。下面代碼已經驗證ok。測試

1. Info數據對象,用來保存生產者和消費者使用的數據this

public class Info {線程

  private int count;對象

  private boolean flag;ip

  public synchronized void set() {get

    if(flag) {it

      try {io

        super.wait();class

      } catch(Exception e) {

        e.printStackTrace();

      }

    }

    System.out.println("Producer Inc 1 --- " + (++count));

    try {

      Thread.sleep(100);

    } catch(Exception e) {

      e.printStackTrace();

    }

    flag = true;

    super.notify();

  }

  public synchronized void get() {

    if(!flag) {

      try {

        super.wait();

      } catch(Exception e) {

        e.printStackTrace(); 

      }

    }

    System.out.println("Consumer Dec 1 --- " + (--count));

    try {

      Thread.sleep(100);

    } catch(Exception e) {

       e.printStackTrace();

    }

    flag = false;

    super.notify();

  }

}

Producer生產者:

public class Producer implements Runnable {

  private Info info = null;

  public Producer(Info info) {

    this.info = info;

  }

  @Override

  public void run() {

    for(int i=0; i<20; i++) {

      this.info.set();

    }

  }

}

 

Consumer消費者:

public class Consumer implements Runnable {

  private Info info = null;

  public Consumer(Info info) {

    this.info = info;

  }

  @Override

  public void run() {

    for(int i=0; i<20; i++) {

      this.info.get();

    }

  }

}

 

測試類Test:

public class Test {

  public static void main(String[] args) {

    Info info = new Info();

    

    Producer producer = new Producer(info);

    new Thread(producer).start();

    

    Consumer consumer = new Consumer(info);

    new Thread(consumer).start();

  }

}

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