Lab description:

In this lab, I will have to create four java files. There are three classes, Car(), Plane(), and Ship() that will implement the abstract methods in the given interface, Movable(); Finally, create a client/program, that uses an array to created three new objects, to run all methods implemented in the three classes and given the output as same as the instruction sheet.

Code:

//Name: Guan Hong Chen
//Date: Nov. 04 2013
//CET 3640 Fall 2013
//Lab 4 (Movable.java)

public interface Movable 
{
	public void moveForward();
	public void moveBackward();
	public void stop();
	public void moveLeft();
	public void moveRight();
}

//Name: Guan Hong Chen
//Date: Nov. 04 2013
//CET 3640 Fall 2013
//Lab 4 (Car.java)

public class Car implements Movable
{

	@Override
	public void moveForward() 
	{
		System.out.println("Car drives forward");
	}

	@Override
	public void moveBackward() 
	{
		System.out.println("Car drives backward");

	}

	@Override
	public void stop() 
	{
		System.out.println("Car parked");

	}

	@Override
	public void moveLeft() 
	{
		System.out.println("Car turns left");

	}

	@Override
	public void moveRight() 
	{
		System.out.println("Car turns right");

	}

}

//Name: Guan Hong Chen
//Date: Nov. 04 2013
//CET 3640 Fall 2013
//Lab 4 (Plane.java)

public class Plane implements Movable
{
	@Override
	public void moveForward() 
	{
		System.out.println("Plane flying forward");
	}

	@Override
	public void moveBackward() 
	{
		System.out.println("Plane taxiing backward");

	}

	@Override
	public void stop() 
	{
		System.out.println("Plane Landed");

	}

	@Override
	public void moveLeft() 
	{
		System.out.println("Plane flying left");

	}

	@Override
	public void moveRight() 
	{
		System.out.println("Plane fly right");

	}

}

//Name: Guan Hong Chen
//Date: Nov. 04 2013
//CET 3640 Fall 2013
//Lab 4 (Ship.java)

public class Ship implements Movable
{
	@Override
	public void moveForward() 
	{
		System.out.println("Ship navigates forward");
	}

	@Override
	public void moveBackward() 
	{
		System.out.println("Ship navigates backward");

	}

	@Override
	public void stop() 
	{
		System.out.println("Ship docked");

	}

	@Override
	public void moveLeft() 
	{
		System.out.println("Ship navigates left");

	}

	@Override
	public void moveRight() 
	{
		System.out.println("Ship navigates right");

	}

}

//Name: Guan Hong Chen
//Date: Nov. 04 2013
//CET 3640 Fall 2013
//Lab 4 (App.java)

public class App 
{
	public static void main(String[] args) 
	{
		Movable[] movableObjects = new Movable[3];

		movableObjects[0] = new Plane();
		movableObjects[1] = new Car();
		movableObjects[2] = new Ship();

		for(Movable currentMovable : movableObjects)
		{
			currentMovable.moveForward();
			currentMovable.moveBackward();
			currentMovable.stop();
			currentMovable.moveLeft();
			currentMovable.moveRight();
			// Just so it looks exactly like shown in the lab instruction;
			System.out.println("---------------------");
		}

	//Bonus comment: Should I comment my code when I am writing? 

	}

}

Screenshot: