How to represent sound file as byte array in Java

Question

I am using some algorithms which need data represented in array of bytes it is no problem when I am working on text files but I don't know how to put a sound file in a that kind of array. I don't have specified extension of that sound file, so it can be whatever is the easiest. So: How to put a sound file to a byte array in Java?

Thank you.

byte[] bytes = new byte[length];? your question isn't clear. do you not know how to create bytes array and java syntax? — gigadot
– gigadot, Commented Sep 25, 2012 at 23:31
What is unclear? I have a SOUND(not text) file in a specified directory and I would like to put it into array of bytes? — Yoda
– Yoda, Commented Sep 25, 2012 at 23:35
What format are you getting the sound in? The WAVE format is usually the easist to work with. — Jakub Zaverka
– Jakub Zaverka, Commented Sep 25, 2012 at 23:37
Do you need to put the sound samples into the array to process later, or do you just need to read a generic file into a bytearray? — Jakub Zaverka
– Jakub Zaverka, Commented Sep 25, 2012 at 23:40
basically, there are no different between text file and any other files . they are all stream of bytes. the only difference is in the sequence or pattern of the bytes. — gigadot
– gigadot, Commented Sep 25, 2012 at 23:41

gigadot · Accepted Answer · 2012-09-25 23:47:17Z

3

Alternatively, if you can use Apache common IO library, the FileUtils class contains a readFileToByteArray method for reading a file into a byte array in one line:

byte[] bytes = FileUitls.readFileToByteArray(file);

answered Sep 25, 2012 at 23:47

gigadot

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Jon Lin · Accepted Answer · 2012-09-25 23:51:36Z

3

So: How to put a sound file to a byte array in Java?

File f = new File(soundFilePath, soundFileName);
byte[] soundFileByteArray = new byte[f.length()];
FileInputStream fis = new FileInputStream(f);
fis.read(soundFileByteArray);

edited Sep 25, 2012 at 23:51

answered Sep 25, 2012 at 23:39

Jon Lin

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3 Comments

giannis christofakis Over a year ago

Is it that simple?Don't you have to put the read inside a while in order to check whether the file ends?

gigadot Over a year ago

@giannosfor if you allocate enough length for the array, then it reads the whole file.

Hesam Over a year ago

@gigadot f.length() returns long while new byte[] expects int, changing it to new byte[(int) f.length()] is okay? since there is possibility of losing some data.

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