我已经实现了两个类，名为 aTicket和Flight。我的主要程序是FlightTicketsProgram（不利的）：
ArrayList<Ticket> tickets = new ArrayList<Ticket>();
ArrayList<Flight> flights = new ArrayList<Flight>();
Ticket ticket1 = new Ticket("201409112003", "George", "White", "TK2141");
Ticket ticket2 = new Ticket("201408182023", "John", "Clemens", "TK1852");
Ticket ticket3 = new Ticket("201409171004", "Alex", "Cats", "TK2141");
tickets.add(ticket1);
tickets.add(ticket2);
tickets.add(ticket3);
Flight flight1 = new Flight("TK2141", "THY", "Ankara", "Istanbul", "25.08.2014", "14:00", "14:50");
Flight flight2 = new Flight("TK1852", "THY", "Barselona", "Istanbul", "15.09.2014", "05:55", "10:20");
Flight flight3 = new Flight("PC2136", "Pegasus", "Adana", "Izmir", "18.07.2014", "20:35", "22:40");
Flight flight4 = new Flight("DL9450", "Delta", "Frankfurt", "Amsterdam", "20.09.2014", "10:55", "13:00");
Flight flight5 = new Flight("KL1857", "KLM", "Amsterdam", "Dusseldorf", "13.08.2014", "13:20", "14:30");
Flight flight6 = new Flight("PC1177", "Pegasus", "Antalya", "Istanbul", "22.10.2014", "10:00", "12:40");
flights.add(flight1);
flights.add(flight2);
flights.add(flight3);
flights.add(flight4);
flights.add(flight5);
flights.add(flight6);
//Step 1: print tickets
System.out.println("Tickets:");
System.out.print(ticket1);
System.out.print(ticket2);
System.out.print(ticket3);
//Step 2: print flights
System.out.println("\nExisting flights:");
System.out.println(flight1);
System.out.println(flight2);
System.out.println(flight3);
System.out.println(flight4);
System.out.println(flight5);
//Step 3: change a ticket
System.out.println("Ticket change:");
tickets.get(0).setFlightNumber("PC2136");
System.out.print(tickets.get(0));
//Step 4: change a flight
System.out.println("\nFlight change:");
flights.get(5).setDeparture("10:20");
flights.get(5).setArrival("13:00");
System.out.print(flights.get(5));
我必须看到我的输出，就像FlightTicketsProgram.java.
门票：
201409112003 - TK2141 - George White
201408182023 - TK1852 - John Clemens
201409171004 - TK2141 - Alex Cats
现有航班：
THY - TK2141 Date: 25.08.2014
From: Ankara - To: Istanbul
Departure: 14:00 - Arrival: 14:50
我怎样才能做到这一点？