Producer生产者顾名思义就是生产数据的线程,Consumer消费者就是使用数据的线程。可以有多个生产者,也可以有多个消费者,当生产者和消费者都是一个的时候,又叫做管道Pipe Pattern。
下面简单写了个例子,一个线程加1,一个线程减1,一个生产者、一个消费者,生产者用来加1,消费者用来减1。下面代码已经验证ok。
1. Info数据对象,用来保存生产者和消费者使用的数据
public class Info {
private int count;
private boolean flag;
public synchronized void set() {
if(flag) {
try {
super.wait();
} 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生产者:
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消费者:
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();
}
}
}
测试类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();
}
}