The if/else Construct in Java Example

 public class IfElseElevator {

 public boolean doorOpen=false; // Doors are closed by default
 public int currentFloor = 1; // All elevators start on first floor
 public final int MAX_FLOORS = 10;
 public final int MIN_FLOORS = 1;

 public void openDoor() {
 System.out.println(“Opening door.”);
 doorOpen = true;
 System.out.println(“Door is open.”);
}

 public void closeDoor() {
 System.out.println(“Closing door.”);
 doorOpen = false;
 System.out.println(“Door is closed.”);
 }

 public void goUp() {
 System.out.println(“Going up one floor.”);
 currentFloor++;
 System.out.println(“Floor: “ + currentFloor);
 }

 public void goDown() {

 if (currentFloor == MIN_FLOORS) {
 System.out.println(“Cannot Go down”);
}

else {
 System.out.println(“Going down one floor.”);
 currentFloor--;
 System.out.println(“Floor: “ + currentFloor);
 }
 }

 public int getFloor() {

 return currentFloor;
 }

 public boolean checkDoorStatus() {
 return doorOpen;
 }
 }