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javamultidimensional-arraystorage

2-Dimensional array storage

I have recently stumbled upon this problem. I want to store a 2-dimensional int array in a file to be read later. Is there any way of doing this other than simple txt.file? (Java as programming language)

Solution

  • As indicated by @Andy you can use ObjectOutputStream to serialize array to a file

    int[][] intArray = new int[5][5];
//Code to populate array

// serialize array
FileOutputStream fos = new FileOutputStream("array.dat");
ObjectOutputStream oos = new ObjectOutputStream(fos);
oos.writeObject(intArray);

    And then it can be read back as an array from file using ObjectInputStream

    FileInputStream fis = new FileInputStream("array.dat");
ObjectInputStream iis = new ObjectInputStream(fis);
intArray = (int[][]) iis.readObject();

    Hope this helps.