This lab is to create a interface class. The code “interface Moveable” is given, base on this code we need to implement three classes “Car”,”Plane” and “Ship”. To do that, we use keyword implements for these classes, then we implementing the codes for each of the interface method. After that, create a program that will polymorphically process an array of Movable by calling each of the interface methods.

Code:

package lab6;

public class MoveableApp {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Moveable[] myMoveable = new Moveable[3];
		myMoveable[0] = new Plane();
		myMoveable[1] = new Car();
		myMoveable[2] = new Ship();

		for (Moveable m : myMoveable) {
			m.moveForward();
			m.moveBackward();
			m.stop();
			m.moveLeft();
			m.moveRight();
			System.out.println("--------------------------");
		}
	}

}
____________________________________________________________________
package lab6;

public interface Moveable {
	public void moveForward();

	public void moveBackward();

	public void stop();

	public void moveLeft();

	public void moveRight();

}
_____________________________________________________________________
package lab6;

public class Car implements Moveable {

	@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 turn right");
	}

}
_____________________________________________________________________
package lab6;

public class Plane implements Moveable {

	@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 landen");

	}

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

	}

	@Override
	public void moveRight() {
		System.out.println("Plane flying right");
	}
}
_____________________________________________________________________
package lab6;

public class Ship implements Moveable {

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

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

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

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

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

}

Screenshots: