Ticket project using Inheritance

AdvanceTicket.java

/*AdvanceTicket.java subclass of Ticket
 * March 24, 2020
 */
public class AdvanceTicket extends Ticket {
		//additional property
		protected int daysInAdvance;

		//parameter constructor
		public AdvanceTicket(int num, int days)
		{
			super.number=num;
			daysInAdvance=days;
			setPrice();
		}

		//IDE/JAVA added a default constructor automatically
	public AdvanceTicket() {
	}

	//override SetPrice
		public void setPrice()
		{
			if(daysInAdvance>=10){
				super.price=30;
			}
			if(daysInAdvance<10 && daysInAdvance>=1){
				super.price=40;
			}
				
		}
}

StudentAdvanceTicket.java

/*StudentAdvanceTicket.java subclass of AdvanceTicket 
 * March 24, 2020
 */

import java.text.DecimalFormat;

public class StudentAdvanceTicket extends AdvanceTicket{
	
	//For formatting currency
	DecimalFormat currencyF = new DecimalFormat("#.00");
	
	//parameter constructor	
	public StudentAdvanceTicket(int num, int days)
	{
		super.daysInAdvance=days;
		super.number=num;
		setPrice();
	}
	
	//override setPrice()
	public void setPrice()
	{
		if(super.daysInAdvance>=10){
			super.price=15;
		}
		if(super.daysInAdvance<10 && super.daysInAdvance>=1){
			super.price=20;
		}
	}
	
	//override toString()
	public String toString()
	{
		return "Ticket number: " + number + ", Price: $" + currencyF.format(price)+ " (ID required)";
	}
	
}

Ticket.java

/*Ticket.java superclass
 * March 24, 2020
 */
import java.text.DecimalFormat;

public abstract class Ticket {

	//properties
	protected int number;
	protected double price;
	
	//For formatting currency
	DecimalFormat currencyF = new DecimalFormat("#.00");
	
	//parameter constructor
	public Ticket(int num)
	{
		number=num;
		price=0.0;
	}

	//IDE/JAVA added a default constructor automatically
	protected Ticket() {
	}

	//abstract setPrice Method
	public abstract void setPrice();
	
	//toString method
	public String toString()
	{
		 return "Ticket number: " + number + ", Price: $" + currencyF.format(price);		
	}
	
}

TicketMain.java

/*TicketMain.java Driver program to test the Ticket hierarchy.
 * March 24, 2020
 * Description: This program demonstrates a hierarchy of classes to
 * represent different types of tickets to a campus event.
 */
public class TicketMain {

	public static void main(String[] args) {
		
		//array of Tickets, size 3
		Ticket[] tickets =new Ticket[3];
		
		//assign three different types of Tickets to the array
		tickets[0]=new WalkUpTicket(17);
		tickets[1]=new AdvanceTicket(24,10);
		tickets[2]=new StudentAdvanceTicket(30,9);

		
		//use polymorphism and a for loop to display the three tickets
		for (int x=0;x<tickets.length;x++){
			System.out.println(tickets[x]);
		}

	}

}

WalkUpTicket.java

/*WalkUpTicket.java subclass of Ticket
 * March 24, 2020
 */

public class WalkUpTicket extends Ticket{

	//parameter constructor
	public WalkUpTicket(int num)
	{
		super.number=num;
		setPrice();

	}

	//override setPrice()
	public void setPrice()
	{
		super.price=50;
	}
}