Fastest way to read huge number of int from binary file

Question

I use Java 1.5 on an embedded Linux device and want to read a binary file with 2MB of int values. (now 4bytes Big Endian, but I can decide, the format)

Using D

Answer 1

I don't know if this will be any faster than what Alexander provided, but you could try mapping the file.

    try (FileInputStream stream = new FileInputStream(filename)) {
        FileChannel inChannel = stream.getChannel();

        ByteBuffer buffer = inChannel.map(FileChannel.MapMode.READ_ONLY, 0, inChannel.size());
        int[] result = new int[500000];

        buffer.order( ByteOrder.BIG_ENDIAN );
        IntBuffer intBuffer = buffer.asIntBuffer( );
        intBuffer.get(result);
    }