Java Blocking Queue

//Listing 8-1. The Blocking Queue Equivalent of Chapter 3’s PC Application
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class A
{
public static void main(String[] args)
{
final BlockingQueue<Character> bq;
bq = new ArrayBlockingQueue<Character>();
final ExecutorService executor = Executors.newFixedThreadPool();
Runnable producer = () ->
{
for (char ch = 'A'; ch <= 'Z'; ch++)
{
try
{
bq.put(ch);
System.out.printf("%c produced by " + "producer.%n", ch);
}
catch (InterruptedException ie)
{
}
}
};
executor.execute(producer); Runnable consumer = () ->
{
char ch = '\0';
do
{
try
{
ch = bq.take();
System.out.printf("%c consumed by " + "consumer.%n", ch);
}
catch (InterruptedException ie)
{
}
}
while (ch != 'Z');
executor.shutdownNow();
};
executor.execute(consumer);
}
}
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