/*
 * ErrorMailbox.java
 *
 * 1.0
 *
 * 000908
 *
 * Leif Lindbäck.
 *
 */

public class ErrorMailbox {
    private int mail;

    /**
     * Sends the mail.
     */
    public void setMail(int m) {
	mail = m;
    }

    /**
     * Returns the mail.
     */
    public int getMail() {
	return mail;
    }

    /**
     * Tests the mailbox.
     */
    public static void main( String[] args ) {

	ErrorMailbox mb = new ErrorMailbox();
	new Thread( new Producer( mb ) ).start();
	new Thread( new Consumer( mb ) ).start();

    }

}

/**
 * A thread that puts mail in the mailbox.
 */
class Producer implements Runnable {
    private ErrorMailbox mb;

    /**
     * Constructs a Runnable that puts mail in the specified mailbox.
     */
    public Producer( ErrorMailbox mb ) {
	this.mb = mb;
    }

    /**
     * Prints messages and puts them in the mailbox.
     */
    public void run() {
	int mailNo = 0;

	for (;;) {
	    System.out.println( "<<<putting mail no " + mailNo );
	    mb.setMail( mailNo++ );
	}

    }

}

/**
 * A thread that takes mail form the mailbox.
 */
class Consumer implements Runnable {
    private ErrorMailbox mb;

    /**
     * Constructs a Runnable that takes mail from the specified mailbox.
     */
    public Consumer( ErrorMailbox mb ) {
	this.mb = mb;
    }

    /**
     * Gets messages from the mailbox and prints them.
     */
    public void run() {

	for (;;) {
	    System.out.println( ">>>>>taking mail no " + mb.getMail() );
	}

    }

}