Q2.2.txt

-------------------------------TestComp.java---------------------------------
import java.util.Random;
public class TestComp {

	public static void main(String[] args) {
		Compartment arr[]=new Compartment[10];
		Random rand = new Random(); 
		for(int i=0;i<10;i++) {
			
			int n = rand.nextInt(3);
			if(n==0)
			{
				arr[i]=new FirstClass();
			}
			else if(n==1)
			{
				arr[i]=new General();
			}
			else if(n==2)
			{
				arr[i]=new Luggage();
			
			}
			else if(n==3)
			{
				arr[i]=new Ladies();
			
			}
		}
			
			
			for(int i=0;i<10;i++)
			{
				if(arr[i] instanceof FirstClass)
				{
					
					FirstClass m=(FirstClass)arr[i];
					
					m.notice();
					
				}
				if(arr[i] instanceof Ladies)
				{
					
					Ladies m=(Ladies)arr[i];
					m.notice();
				}
				if(arr[i] instanceof Luggage)
				{
					Luggage m=(Luggage)arr[i];
					m.notice();
				}
				if(arr[i] instanceof General)
				{
					General m=(General)arr[i];
					m.notice();
				}
			}
	}

}

-----------------------------Compartment---------------------------------------


public abstract class Compartment {
	public abstract void notice();

}

----------------------------General---------------------------------------------

public class General extends Compartment {

	@Override
	public void notice() {
		System.out.println("This is General Class");

	}

}

---------------------------FirstClass-------------------------------------------

public class FirstClass extends Compartment {
	
	public void notice() {
		System.out.println("This is First Class");
	}
}
------------------------------Ladies--------------------------------------------


public class Ladies extends Compartment {

	@Override
	public void notice() {

		System.out.println("This is Ladies Class");

	}

}
------------------------------Luggage-----------------------------------------------

public class Luggage extends Compartment {

	@Override
	public void notice() {

		System.out.println("This is Luggage Class");

	}

}