CODEWITHSUNDEEP
javaarraysarraylistmultidimensional-array
JickRames
JickRames

Reputation: 13

Convert Multiple Arrays to one big multidimesional array and how to manipulate it

So I have these four arrays

ArrayList<String> names = new ArrayList<>();
ArrayList<String> licensePlates = new ArrayList<>();
ArrayList<Integer> mileage = new ArrayList<>();
ArrayList<Integer> engineHours = new ArrayList<>();

But returning them one by one is a hassle so I was wondering how I would go about making a multi-dimensional array to hold all these values instead. And also how I would go about adding something to them, for example, let's say I wanted to add an extra licence plate to the licence plate part of the multi-dimensional array.

Upvotes: 0

Views: 54

Answers (2)

Nitin Jain
Nitin Jain

Reputation: 307

I would highly recommend louis-wasserman approach of creating a class. If you are looking for an alternative then you can take a look at Guava's ListMultiMap

ListMultiMap<String, Object> multiDimArray = ArrayListMultiMap.create();
multiDimArray.put("names", "merc");
multiDimArray.put("mileage", 10);
multiDimArray.put("names", "bmw");
multiDimArray.put("mileage", 20);

// To retrieve the names lists:
List<String> names = multiDimArray.get("names");

Upvotes: 0

Louis Wasserman
Louis Wasserman

Reputation: 198481

Make a class. It is really a bad idea to try to shoehorn lists with different meanings into one big multidimensional list, or to try to have multiple lists "line up" like that.

 class Car {
   String name;
   String licensePlate;
   int mileage;
   int engineHours;
   ...constructor, getters...
}
List<Car> carList;

Upvotes: 2

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