//生产者
package com.mzj.test;
import java.util.Vector;
import java.util.logging.Level;
import java.util.logging.Logger; public class Producer implements Runnable { private final Vector sharedQueue;
private final int SIZE; public Producer(Vector sharedQueue, int size) {
this.sharedQueue = sharedQueue;
this.SIZE = size;
} @Override
public void run() {
// TODO Auto-generated method stub
for (int i = 0; i < 7; i++) {
System.out.println("Produced:" + i);
try {
produce(i);
} catch (InterruptedException ex) {
Logger.getLogger(Producer.class.getName()).log(Level.SEVERE, null, ex);
}
}
} private void produce(int i) throws InterruptedException { //wait if queue is full
while (sharedQueue.size() == SIZE) {
synchronized (sharedQueue) {
System.out.println("Queue is full " + Thread.currentThread().getName()
+ " is waiting , size: " + sharedQueue.size());
sharedQueue.wait();
}
} //producing element and notify consumers
synchronized (sharedQueue) {
sharedQueue.add(i);
sharedQueue.notifyAll();
}
}
}
消费者
package com.mzj.test;
import java.util.Vector;
import java.util.logging.Level;
import java.util.logging.Logger; public class Consumer implements Runnable { private final Vector sharedQueue;
private final int SIZE; public Consumer(Vector sharedQueue, int size) {
this.sharedQueue = sharedQueue;
this.SIZE = size;
} @Override
public void run() {
// TODO Auto-generated method stub
while (true) {
try {
System.out.println("Consumer: " + consume());
Thread.sleep(50);
} catch (InterruptedException ex) {
Logger.getLogger(Consumer.class.getName()).log(Level.SEVERE, null, ex);
}
}
} private int consume() throws InterruptedException { //wait if queue is empty
while (sharedQueue.isEmpty()) {
synchronized (sharedQueue) {
System.out.println("Queue is empty " + Thread.currentThread().getName()
+ " is waiting , size: " + sharedQueue.size());
sharedQueue.wait();
}
} //otherwise consume element and notify waiting producer
synchronized (sharedQueue) {
sharedQueue.notifyAll();
return (Integer) sharedQueue.remove(0);
}
}
}
测试
package com.mzj.test;
import java.util.Vector; public class ProducerConsumerSolution { public static void main(String[] args) {
Vector sharedQueue = new Vector();
int size = 4;
Thread prodThread = new Thread(new Producer(sharedQueue, size), "Producer");
Thread consThread = new Thread(new Consumer(sharedQueue, size), "Consumer");
prodThread.start();
consThread.start();
}
}