如何在同一個二維數組中使用兩個構造函數？ Java

我有兩個構造函數我想用來區分同一個數組中的兩種類型的對象，儘管「類型不匹配」。所以我知道我必須以不同的方式聲明數組，我只是不知道該怎麼做。如何在同一個二維數組中使用兩個構造函數？ Java

對於數組中的前三個位置，我想使用Pilots類，而對於其他Passenger類。

public class Project_Space 
{ 
    public static void main(String[] args) 
    { 
// 2D Array of Passengers objects- the Passengers class is in the Passengers.java file 
//Pilot objects are constructed from Pilots.java file 

Passengers[][] Members ; 

    int num_flights= 6; //create the "x" bound/size of the array 

    int num_passengers= 9;  //create the "y" bound/size of the array 

    Members = new Passengers[num_flights][num_passengers]; //define the size of the array 6flights/9Passengers 

    //The Members array at index 0 is the first flight 

//Members[0][0] = new Pilots(1,-1,"","","",0); //This spot in the array is for the Flight number in the first spot. Everything else are place holders for data that doesn't pertain to the company 

Members[0][1] = new Pilots(1,"1877963200","Amadeus","Durrutti","Buckminster Cornwallis","1288211435", 11); //This spot in the array is for the first passenger of flight #1 

Members[0][2] = new Pilots(2,"6054350085","Sirius","Sassafrass","Ali Bababa","1776812631", 9); 

Members[0][3] = new Passengers(1,"7065253333","Amy","Hartman","Betty Sue","7708889999", 3, 50000,"0554055405540554"); 

Members[0][4] = new Passengers(2,"7545251337","Amanda","Zion","Beatrice Twix","7448656577", 4, 2000,"0554055405541111"); 

Members[0][5] = new Passengers(3,"8904448899","Janet","Graves","Neal Wade","4445556666", 5, 3000, "9031029266161432"); 

Members[0][6] = new Passengers(4,"8902234567","Kristen","Pickering","Christopher Soto","5685461208", 6, 51500, "0985028135114275"); 

Members[0][7] = new Passengers(5,"5000893778","Julianna","Estrada","Jill Hansen","2770779833", 7, 0, "0213595590286251"); 

Members[0][8] = new Passengers(6,"2080670437","Regena","Mckenzie","Vicki Cook","6224215759", 8, 250, "8204699533830238");

來源

2014-12-03 Matt Parks

這是OOP的一個很好的例子。

如果飛行員和乘客都是同一個基類的子類，這將工作正常。例如，這兩個類可能包含類似的字段，如名稱和ID。

聲明具有這些字段以及這兩個類都包含的其他常用方法的基類Person。然後，你就可以到數組聲明爲Person[][] Members;

public class Person { 

    String firstName,lastName; 
    int id; 

    //constructors, getter and setter methods 

}

然後乘客和駕駛員可以從兩個人繼承這樣的：

public class Pilot extends Person { 
    int totalHoursLogged; 
    String airline; 
    int salary; 

    //constructors and methods that differentiate Pilots from Passengers. 

}

來源

2014-12-03 00:16:29 Thorn

非常感謝您的詳細解釋，我會實施它，讓我們知道如何回到我的電腦。一旦我拿到代表，我也會讓你高興。再次感謝芽。 – 2014-12-03 00:27:17

這是一個編程類的項目嗎？快樂編碼:) – Thorn 2014-12-03 00:30:45

是的，它是一個編程課。你的解釋是完美的，只是讓我有點適應一切。再次感謝你！ – 2014-12-03 02:25:49

創建Object類的陣列或定義一個父類Pilots和Passengers，然後創建超類的數組。您將能夠將任何子類對象添加到父類數組。

來源

2014-12-03 00:04:45

謝謝你，我知道我很接近我只是找不到任何例子！ =]一旦我到達我可以upvote你得到它。 – 2014-12-03 00:23:45

如何在同一個二維數組中使用兩個構造函數？ Java

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