start of air port

AirPlane.java
===================

public class AirPlane extends Thread{
    private AirPort myAirPort;


    public AirPlane(AirPort airPort)
    {
        this.myAirPort=airPort;
    }

    public long getTheId()
    {
        return 0;
    }
}


AirPort.java
====================
import java.util.LinkedList;
import java.util.Queue;
import java.util.Vector;


public class AirPort implements Runnable {
    // name of our air port
    private String name;
    // list of all air planes
    private Vector<AirPlane> allAirplanes = new Vector<AirPlane>();
    // list of air plane in queue
    private Queue<AirPlane> waitingAirplanes = new LinkedList<AirPlane>();
    // if my lovely air port is open
    private boolean isOpen = true;

    // set my airport name
    public AirPort(String name) {
        this.name = name;
    }

    // add new airplane to airport
    public void addAirplane(AirPlane newAirPlane) {
        allAirplanes.add(newAirPlane);
        newAirPlane.start();
    }

    // close air port
    public void closeAirport() {
        this.isOpen = false;
        synchronized (this) {
            notifyAll();
        }
    }

    // add waiting airplane to the list.
    public synchronized void addWaitingAirplane(AirPlane waitingAirplane) {
        waitingAirplanes.add(waitingAirplane);
        System.out.println("we add plane #" + waitingAirplane.getId() + "there are still " + waitingAirplanes.size()
                + " air planes waiting");

        //dummy waiting for letting us know that there
        //is an airplane waiting
        /*
        synchronized (this) {
            if (waitingAirplanes.size() == 1) {
                notify();
            }
        }
        */
    }

    // notify single air plane
    public synchronized void notifyAirPlane() {
        AirPlane firstAirplane = waitingAirplanes.poll();
        if (firstAirplane != null) {
            System.out.println("air port is notifying airplane #" + firstAirplane.getTheId());
            synchronized (firstAirplane) {
                firstAirplane.notifyAll();
            }
        }
        try {
            System.out.println(
                    "AirPort waits the airplane #" + firstAirplane.getTheId() + " will announce it is finished");
            wait(); // wait till the airplane is finished
            System.out.println("Airport was announced the airplane #" + firstAirplane.getTheId() + " is finished");
        } catch (InterruptedException e) {
            e.getMessage();
        }
    }

    @Override
    public void run() {
        // TODO Auto-generated method stub
        System.out.println("Air port is ready.....");
        while (isOpen) {
            if (!waitingAirplanes.isEmpty()) {
                notifyAirPlane();
            } else {
                synchronized (this) {
                    try {
                        System.out.println("Air Port has no air planes that waits");
                        wait(); // wait for getting an air plane
                        System.out.println("air port recived a message from waiting airplane");
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
            System.out.println("Air port is closed for Asakim!!!");
        }

    }
}


tester.java
================

public class Tester {

    public static void main(String[] args) throws InterruptedException {
        AirPort ourAirPort = new AirPort("Schifall");
        Thread airPortThread = new Thread(ourAirPort);
        airPortThread.start();

        AirPlane[] allAirPlanes = new AirPlane[25];

        for (int i=0;i<allAirPlanes.length; i+=1)
        {
            allAirPlanes[i] = new AirPlane(ourAirPort);
            ourAirPort.addAirplane(allAirPlanes[i]);
        }

        for (int i=0; i <allAirPlanes.length; i+=1)
        {
            allAirPlanes[i].start();
            allAirPlanes[i].join();
        }

        ourAirPort.closeAirport();
        airPortThread.join();
        System.out.println("Good bye!!!!");


    }

}