```java import java.util.Random; import java.util.concurrent.BlockingQueue; import java.util.concurrent.LinkedBlockingQueue;

public class Main { public static void main(String[] args) { BlockingQueue<Integer> queue = new LinkedBlockingQueue<>();

    Thread generatorThread = new Thread(new Generator(queue));
    Thread checkerThread = new Thread(new Checker(queue));
    Thread printerThread = new Thread(new Printer(queue));

    generatorThread.start();
    checkerThread.start();
    printerThread.start();
}

}

class Generator implements Runnable { private BlockingQueue<Integer> queue; private Random random;

public Generator(BlockingQueue<Integer> queue) {
    this.queue = queue;
    this.random = new Random();
}

@Override
public void run() {
    while (true) {
        try {
            int number = random.nextInt(100);
            queue.put(number);
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

}

class Checker implements Runnable { private BlockingQueue<Integer> queue;

public Checker(BlockingQueue<Integer> queue) {
    this.queue = queue;
}

@Override
public void run() {
    while (true) {
        try {
            int number = queue.take();
            if (number % 2 == 0) {
                queue.put(number);
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

}

class Printer implements Runnable { private BlockingQueue<Integer> queue;

public Printer(BlockingQueue<Integer> queue) {
    this.queue = queue;
}

@Override
public void run() {
    while (true) {
        try {
            int number = queue.take();
            System.out.println("Even number: " + number);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}