Store content of file in array of bytes

[Aaliya Seth]

Hello,
I would like to get an array of byte [] from a file (File Object). So, I there fore initially used a file object

File file = new File (path)

and it would supply an array byte [] from the contents of File. Is that possible? That is I want to store content of the file in an array of the database.

[MindSpace]

Hi,
It is very easy with Streams, you can do it in this way

FileInputStream in = new FileInputStream(ObjFile);
int next = in.read()
byte b;
b = (byte)next;

And that's how you recover your byte. To make a table hop a small loop and it will work. the method read () returns -1 when you reach the end of the file.

[Katty]

Hello,
You can optimize if you have a large file to read, rather than read by byte, instead use the method read (byte [] b) you can use FileInputStream. You can read and ask directly, such as some bytes in a byte array, and make a loop to reach the end of the file, storing the previous table, a Vector or ListArray, for example, have a dynamic structure. Be careful though if you have large files to read, has not had an OutOfMemory. It returns -1 in the same way when there's nothing to read, and it lets you read your files very quickly.

[opaper]

Hello,
Here is a simple example to convert an entire file into an array of byte

File fl = new File(path);
byte[] tb = new byte[fl.length()];
FileInputStream in = new FileInputStream(fl);
in.read(board);

Hope this program will help you.

[MindSpace]

Hi,
I agree tho this, unless and until you have a very heavy file. I can not see spending a few hundred MB in loading of a sudden. Otherwise, to answer your question, you read arrays of bytes to some bytes for example, that you fill in a Vector, without going into detail, with the exception handling and other.

[kelfro]

Hello,
I completely agree with the above, just have a look at the below example.

byte [] currdt = new byte[500];
numchrd = myReader.read(currdt,0,500);
StoredBytes.add(currdt);

Here, you read in blocks of 500 bytes through AC in a loop. On large files, you can not load all of a sudden.