Maximum size of a file that the getResourceAsStream() can read?

Question

hi guys.before i post this new topic, i have search through the forum,and google. on the web .so reply are appreciated.
1) getResourceAsStream() method, is there a way to know the maximum size of a file that the getResourceAsStream() can read?
InputStream          is = getClass().getResourceAsStream("Dream2.gif");
                              byte[]               byte0          = new byte[10 * 1024];
bcos the size of my bytearray is hardcoded, if any thing is greater than that size ,my program would crash.so i would like to know if there is a way to do that
2)if that is not available, are there any methods in j2me using any connection (http or socket),that can know the maximum size of the file that are available??????

Answer 1

You won't be able to tell how big the resource is using this approach. However, since your resource is in the JAR you will be able to know the size of it before hand.
Otherwise, use the read(byte[], int, int) method to read the resource in chunks like this:
int count = 0;
byte[] bytes = new byte[1024];
while ((count = read(bytes, count, 1024)) != -1) {
  // do something like write to a ByteArrayOutputStream
}Although redundant, using this approach you can see that you can keep a count of the number of bytes you've read and thus know the total size of the resource.