Java通过wait()和notifyAll()方法实现线程间通信

时间:2021-05-20

本文实例为大家分享了Java实现线程间通信的具体代码,供大家参考,具体内容如下

Java代码(使用了2个内部类):

package Threads;import java.util.LinkedList;/** * Created by Frank */public class ProdCons { protected LinkedList<Object> list = new LinkedList<>(); protected int max; protected boolean done = false; public static void main(String[] args) throws InterruptedException { ProdCons prodCons = new ProdCons(100, 3, 4); Thread.sleep(5 * 1000); synchronized (prodCons.list) { prodCons.done = true; try { prodCons.notifyAll(); } catch (Exception ex) { } } } private ProdCons(int maxThreads, int nP, int nC) { this.max = maxThreads; for (int i = 0; i < nP; i++) { new Producer().start(); } for (int i = 0; i < nC; i++) { new Consumer().start(); } } class Producer extends Thread { public void run() { while (true) { Object justProduced = null; try { justProduced = getObj(); } catch (InterruptedException e) { e.printStackTrace(); } synchronized (list) { while (list.size() == max) { try { list.wait(); } catch (InterruptedException e) { System.out.println("Producer INTERRUPTED"); } } list.addFirst(justProduced); list.notifyAll(); System.out.println("Produced 1;List size now " + list.size()); if (done) { break; } } } } } class Consumer extends Thread { public void run() { while (true) { Object object = null; synchronized (list) { if (list.size() == 0) { try { list.wait(); } catch (InterruptedException e) { System.out.println("Consumer INTERRUPTED"); } } if (list.size() > 0) { object = list.removeLast(); } list.notifyAll(); System.out.println("List size now " + list.size()); if (done) { break; } } if (null != object) { System.out.println("Consuming object " + object); } } } } private Object getObj() throws InterruptedException { Thread.sleep(1000); return new Object(); }}

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