Created
June 17, 2016 01:08
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Example of Wait-Notify synchronization in Java
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class Bottle { | |
private String message; | |
Bottle() { | |
message = ""; | |
} | |
public synchronized void set(String message) { | |
this.message = message; | |
notifyAll(); | |
} | |
public synchronized String get() { | |
while (message.length() == 0) { | |
try { | |
wait(); | |
} | |
catch (InterruptedException exception) {} | |
} | |
return message; | |
} | |
} | |
class Producer implements Runnable { | |
private Bottle bottle; | |
Producer(Bottle bottle) { | |
this.bottle = bottle; | |
} | |
public void run() { | |
try { | |
Thread.sleep(5000); | |
bottle.set("hello"); | |
} | |
catch (InterruptedException exception) {} | |
} | |
} | |
class Consumer implements Runnable { | |
private Bottle bottle; | |
Consumer(Bottle bottle) { | |
this.bottle = bottle; | |
} | |
public void run() { | |
String message = bottle.get(); | |
System.out.format("Message in the bottle: %s %n", message); | |
} | |
} | |
public class MessageWaiterDemo { | |
public static void main(String[] args) { | |
Bottle bottle = new Bottle(); | |
Thread producer = new Thread(new Producer(bottle)); | |
Thread consumer = new Thread(new Consumer(bottle)); | |
producer.start(); | |
consumer.start(); | |
try { | |
producer.join(); | |
consumer.join(); | |
} | |
catch (InterruptedException exception) { | |
exception.printStackTrace(); | |
} | |
} | |
} |
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