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Editorial Team
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Asked: 2026-05-21T17:07:24+00:00

I have binary data in a file (a list of 32-bit integer values) that

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I have binary data in a file (a list of 32-bit integer values) that I need to get into an int array efficiently. I can’t see any way to do this other than loading the data into a byte[] and then converting it into an int[] one element at a time. This is too slow for the amount of data I need to load. It takes about 3 seconds to do the conversion on an actual phone. Reading the data from the file in the byte[] is pretty much instantaneous.

Are there any libraries that use native methods for reading an int[] from a file, or for converting a byte[] to int[]?

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1 Answer

  1. Editorial Team

    Have you tried the classes of the NIO package? The class ByteBuffer has a method asIntBuffer(), where you can get an IntBuffer view of the ByteBuffer. Then you should be able to get the content as integers by calling get(int[] dst).

    The initial ByteBuffer is available by using file channels.

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