Java實現阻塞佇列的兩種方式
方式一:
/**
* 使用非阻塞佇列PriorityQueue及wait/notify方法實現一個阻塞佇列
*
*/
class MyBlockingQueue {
public final static int queueSize = 10;
public static final PriorityQueue<Integer> queue = new PriorityQueue();
}
class Producer extends Thread {
public void run() {
while(true) {
synchronized(MyBlockingQueue.queue) {
while(MyBlockingQueue.queue.size() == MyBlockingQueue.queueSize) {
try {
System.out.println("烤豬數量已滿,快來吃吧:" + MyBlockingQueue.queue.size());
MyBlockingQueue.queue.wait();
} catch(InterruptedException e) {
e.printStackTrace();
notify();
}
}
MyBlockingQueue.queue.offer(1);
System.out.println("我烤了一頭豬,烤豬數量:"+MyBlockingQueue.queue.size());
MyBlockingQueue.queue.notify();
}
}
}
}
class Consumer extends Thread {
public void run() {
while(true) {
synchronized(MyBlockingQueue.queue) {
while(MyBlockingQueue.queue.size() == 0) {
try {
System.out.println("沒有烤乳豬了,趕快生產一個:" + MyBlockingQueue.queue.size());
MyBlockingQueue.queue.wait();
} catch(InterruptedException e) {
e.printStackTrace();
notify();
}
}
MyBlockingQueue.queue.poll();
System.out.println("吃掉了一頭烤乳豬,當前烤乳豬數量:"+MyBlockingQueue.queue.size());
MyBlockingQueue.queue.notify();
}
}
}
}
方式二:
/**
* 使用阻塞佇列ArrayBlockingQueue實現生產者消費者問題
*
*/
class MyBlockingQueue {
public final static int queueSize = 10;
public static ArrayBlockingQueue<Integer> queue = new ArrayBlockingQueue(queueSize);
}
class Producer extends Thread {
public void run() {
while(true) {
try {
MyBlockingQueue.queue.put(1);
System.out.println("生產了一頭烤乳豬,當前乳豬數量:" + MyBlockingQueue.queue.size());
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
class Consumer extends Thread {
public void run() {
while(true) {
try {
MyBlockingQueue.queue.take();
System.out.println("吃了一頭烤乳豬,當前乳豬數量:" + MyBlockingQueue.queue.size());
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}