类中带有票证的 Java 数组列表

Question

我必须在java中实现Ticket类。这是我的代码:

public class Ticket {

private String name;
private Float defaultPrice;
private Event event;
private static ArrayList<Ticket> ticketList;

public Ticket(String name, Float defaultPrice) {
    this.name = name;
    this.defaultPrice = defaultPrice;
}

public ArrayList<Ticket> getAllTickets() {
    return ticketList;
}

我的主要问题是如何创建 Ticket 类的实例，ticketList 具有新创建的 Ticket 对象。因为稍后我必须使用 public getAllTickets() 方法来获取所有门票。提前致谢!

Answer 1

完整示例:

    package stackoverflow;

    import java.math.BigDecimal;

    public class Ticket {

        private String     name;
        private BigDecimal defaultPrice;

        public Ticket(String name, BigDecimal defaultPrice) {
            this.name = name;
            this.defaultPrice = defaultPrice;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name =

 name;
    }

    public BigDecimal getDefaultPrice() {
        return defaultPrice;
    }

    public void setDefaultPrice(BigDecimal defaultPrice) {
        this.defaultPrice = defaultPrice;
    }
}

事件类别:

package stackoverflow;


import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class Event {

    private Date         date;
    private List<Ticket> ticketList;

    public Event(Date date) {
        this.date = date;
        this.ticketList = new ArrayList<>();
    }

    public void addTicket(Ticket ticket) {
        this.ticketList.add(ticket);
    }

    public List<Ticket> getTicketList() {
        return this.ticketList;
    }
}

主类:

package stackoverflow;


import java.math.BigDecimal;
import java.util.Date;

public class Main {

    public static void main(String[] args) {
        Event eventX = new Event(new Date());

        eventX.addTicket(new Ticket("ticket1", new BigDecimal(50)));
        eventX.addTicket(new Ticket("ticket2", new BigDecimal(50)));
        eventX.addTicket(new Ticket("ticket3", new BigDecimal(50)));
        eventX.addTicket(new Ticket("ticketPremium", new BigDecimal(100)));

        for (Ticket ticket: eventX.getTicketList()) {
            System.out.println("name:" + ticket.getName() + " price: " + ticket.getDefaultPrice());
        }

    }
}