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The Producer-Consumer Problem - Part V

In Java, it's idiomatic to use wait and notify, which require acquiring a lock on the object for which those methods are called:

class Shared {
static final int MAX_BUFFER_SIZE = 3;
static Queue<String> buffer = new ArrayDeque<>();
private static final Object lock = new Object();
static void waitUntilNotified() {
try {
synchronized (lock) {
} catch (InterruptedException ex) {
static void notifyWaitingThread() {
synchronized (lock) {
// {...}
public class Main {
public static void main(String args[]) throws Exception {
new Thread(new Producer(), "produce").start();
new Thread(new Consumer(), "consume").start();
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