public class Elevator
{
   private boolean doorOpen=false;
   private int floor = 1;
   private int weight = 0;

   final int CAPACITY = 1000;
   final int TOP_FLOOR = 5;
   final int BOTTOM_FLOOR = 1;
   final String MUSIC = "Lyle Lovett";

//The next two methods are the equivalent of a "setDoorOpen" method,
//but in the case of an elevator openDoor and closeDoor seem like
//more intuitive method names
  public void openDoor()
  {
     doorOpen = true;
  }

  public void closeDoor()
  {
     checkWeightSensors();

     if (weight <= CAPACITY)
     {
         doorOpen = false;
     }
     else
      //The computer beeps 10 times
     {
      for (int counter=0; counter<10; counter++)
          System.out.print((char) 7);
     }
  }

//In reality the elevator would have weight sensors to
//check the actual weight in the elevator, but for the sake
//of simplicity we just pick a random number to represent the
//weight in the elevator
  private void checkWeightSensors()
  {
     weight = (int) (Math.random() * 1500);
     System.out.println("The weight is " + weight);
  }

  public void goUp()
  {
     if (!doorOpen)
     {
        if (floor < TOP_FLOOR)
        {
           floor++;
           System.out.println(floor);
        }
        else
        {
            System.out.println("Already on top floor.");
        }
    }
    else
    {
       System.out.println("Doors still open!");
    }
  }

  public void goDown()
  {
     if (!doorOpen)
     {
        if (floor > BOTTOM_FLOOR)
        {
           floor--;
           System.out.println(floor);
        }
        else
        {
           System.out.println("Already on bottom floor.");
        }
     }
     else
     {
        System.out.println("Doors still open!");
     }
  }

  public void setFloor(int goal)
  {
     while (floor != goal)
        if (floor < goal)
        {
           goUp();
        }
        else
        {
           goDown();
      }
  }

  public int getFloor()
  {
      return floor;
  }

 // Equivalent of "getOpen" except "is" sounds better than 
 // "get" with booleans
  public boolean isOpen()
  {
      return doorOpen;
  }
  public String playMusic()
  {
      System.out.println("Mmm, the soothing strains of " + MUSIC);
      return MUSIC;
  }
}