生产者和消费者问题

来源：互联网发布：oracle sql教程编辑：程序博客网时间：2024/05/21 00:48

```
package 生产者消费者;

public class ProducerConsumerTest {

public static void main(String[] args) {
PublicResource resource = new PublicResource();
new Thread(new ProducerThread(resource)).start();
new Thread(new ConsumerThread(resource)).start();
new Thread(new ProducerThread(resource)).start();
new Thread(new ConsumerThread(resource)).start();
new Thread(new ProducerThread(resource)).start();
new Thread(new ConsumerThread(resource)).start();
}
}
```
```
package 生产者消费者;
/**
* 生产者线程，负责生产公共资源
* @author dream
*
*/
public class ProducerThread implements Runnable{

private PublicResource resource;

public ProducerThread(PublicResource resource) {
this.resource = resource;
}

@Override
public void run() {
while (true) {
try {
Thread.sleep((long) (Math.random() * 1000));
} catch (InterruptedException e) {
e.printStackTrace();
}
resource.increase();
}
}

}
```

```
package 生产者消费者;

/**
* 消费者线程，负责消费公共资源
* @author dream
*
*/
public class ConsumerThread implements Runnable{

private PublicResource resource;

public ConsumerThread(PublicResource resource) {
this.resource = resource;
}

@Override
public void run() {
while (true) {
try {
Thread.sleep((long) (Math.random() * 1000));
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
resource.decrease();
}

}

}
```

```
package 生产者消费者;

/**
* 公共资源类
* @author dream
*
*/
public class PublicResource {

private int number = 0;
private int size = 10;

/**
* 增加公共资源
*/
public synchronized void increase()
{
while (number >= size) {
try {
wait();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
number++;
System.out.println("生产了1个，总共有" + number);
notifyAll();
}

/**
* 减少公共资源
*/
public synchronized void decrease()
{
while (number <= 0) {
try {
wait();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
number--;
System.out.println("消费了1个，总共有" + number);
notifyAll();
}
}

```

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