CODEWITHSUNDEEP
javamultidimensional-array
Alex
Alex

Reputation: 667

Need a way of storing a 4D array

For the simplicity of the questions let's imagine we were storing a :

int[][][][] values = new int[10][10][10][10];

I'm currently looking to generate tables of values which will be available for looking up later by the computer (not by a person). These values are basically scores for situations. So for example if we wanted to see the score where the first component is 2 the second is 3 the third is 7 and the fourth is 9 then we could go to [2][3][7][9] in the file instead of having to compute the value on the fly.

I understand the technical details of writing and reading to a file but I'm having a hard time getting my head around how to do this.

Let's say with a 2D array and I wanted to find the value of [X][Y] then I could just read and write to the row with value X and the column with value Y.

However, with a 3 or even 4 D array how can we store those values in a text file so that we don't have to generate the array everytime we run the program?

Upvotes: 2

Views: 753

Answers (2)

erikvimz
erikvimz

Reputation: 5476

The easiest way to save this to a file would be using Serializable interface which is already implemented in primitive types (according to this post)

Example:

int[][][][] data = new int[10][10][10][10];

// Write object to a file
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(new File("serializedArray.data")));
oos.writeObject(data);
oos.flush();
oos.close();

// Read an object from a file
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(new File("serializedArray.data")));
Object obj = ois.readObject();
ois.close();

// Cast it back to an int array
data = (int[][][][])obj;

Upvotes: 1

Martin
Martin

Reputation: 3

Java is an object oriented language based on Classes. IMHO you should work with it the way its made for. Either make an Object with 4 fields or a quadratic diamond class:

class Quad<A, B, C, D>

I repeat again this is my honest opinion, mass downvotes INC.

Upvotes: 0

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