inputstream length?

[Grzegorz Stasica]

hi,

How can I get length of inputstrema. The code is as follows:

InputStream r=new FileInputStream("test.txt");

I need to know the length of inputstream in order to store in in
database like
preparedstatement.setBinaryStream(param_id,stream, length?)

Rgs

 

[Oscar kind]

How can I get length of inputstrema.

You don't, as an input stream has the potention to be unlimited.
But there are other possibilities.

The code is as follows:

InputStream r=new FileInputStream("test.txt");

I need to know the length of inputstream in order to store in in
database like
preparedstatement.setBinaryStream(param_id,stream, length?)

This makes it easier: you know the data comes from a file, which has a
length. You can use that length (e.g. through File#length()).

 

[Grzegorz Stasica]

You don't, as an input stream has the potention to be unlimited.
But there are other possibilities.





This makes it easier: you know the data comes from a file, which has a
length. You can use that length (e.g. through File#length()).

I found method available which return numbers of bytes that can be read
without blocking. What blocking means in this situation?

 

[Andrey Kuznetsov]

InputStream r=new FileInputStream("test.txt");
File f = new File("test.txt");
InputStream r=new FileInputStream(f);
long length = f.length();

 

[Boudewijn Dijkstra]

hi,

How can I get length of inputstrema. The code is as follows:

InputStream r=new FileInputStream("test.txt");

long length = 0L;
do
long skip = r.skip(Long.MAX_VALUE);
length += skip;
while (skip > 0L)
r = new FileInputStream("test.txt"); // reset the stream

 

[Steve Horsley]

I found method available which return numbers of bytes that can be read
without blocking. What blocking means in this situation?

If a read method doesn't return immediately but waits for more
data to become available, that is blocking. It typically happens
for network connections (sockets) but also to a lesser extent for
network mounted file shares. This is not what you are looking for.

Use File and length, like this:

File f = new File("data.dat");
int length = f.length();

Steve

 

[Steve Horsley]

Whoops: As others have pointed out, File.length() returns a long,
not an int.