How can I read in file into a byte array?

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#8424

From: Ben Matterson (Borland)
Date: Tue, 20 Mar 2001 20:22

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Hello,

Maybe this is a dead easy question and I am just dumb.

I need to read a file of indeterminate length into an array of bytes. 
What I am having trouble with:

How can I know how big to create the array of bytes if I don't know
how big the file is?

How can I read the whole file into the byte array?
fileInputStream.read() reads one byte at a time, so it s seems like a
while loop would do it. But if I am use "FileInputStream.read() != -1"
as the test condition, where do the bytes that are read go? I don't
get how I can test for end of file (-1) *and* put the returned bytes
into the array.

What am I missing? Can someone give me steer in the right direction?

Ben

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