Java Help -- File I/O

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az - 10 Mar 2005 06:39 GMT

I have two questions regarding file I/O:

(1) If I want to open data.txt in C:\test directory, how to pass
directory name to FileInputStream?

I know how to open data.txt in current directory:
FileInputStream in = new FileInputStream("data.txt")

How to pass C:\test to FileInputStream?

Is the following code right?
FileInputStream in = new FileInputStream("C:\test\data.txt")

(2) How to get a list of file names under C:\test directorr? I want to
get a vector of file names under C:\test directory. How to do this?

Thanks for your help!

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kamal - 10 Mar 2005 07:45 GMT

1). Just use the path to the file as;

FileInputStream a = new FileInputStream("C:\\test\\data.txt"); as \ is
a escape character in Java.

2).
String dir = "C:\\test"
File dir = new File(dir);
File[] files = dir.listFiles();

This gives an array of files. Hope you can use the array instead of a
vector. If a vector is required just put your array elements into the
vector.

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Sameer - 11 Mar 2005 12:58 GMT

How to create a File object for a directory contained in the current
directory?
We usually place the resources like fonts, gif images in a RSC direcory
in the current directory.
I dont want to include full path name of the folder as a parameter.
I tried the following but it wont work:

File file= new File("./RSC");

File file= new File("RSC");

File file= new File(".\RSC");

Please give OS independant representation for the same.
-Sameer

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Fahd Shariff - 10 Mar 2005 10:07 GMT

(1) Did you try this:

FileInputStream in = new FileInputStream("C:\test\data.txt") ;

Did it work?

(2) Try:

File dir = new File("C:\test");
String[] fileNames = dir.list() ;

Returns an array of strings naming the files and directories in the
directory denoted by this abstract pathname

Also see listFiles() and consult the API!

--
Fahd Shariff
http://www.fahdshariff.cjb.net
"Let the code do the talking... "

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Wannabee - 10 Mar 2005 10:49 GMT

"Fahd Shariff"

> FileInputStream in = new FileInputStream("C:\test\data.?txt") ;

FileInputStream in = new FileInputStream("C:\\test\\data.?txt") ;

> File dir = new File("C:\test");

File dir = new File("C:\\test");

Must be two backslashes "\\" in sourcecode if you want to get one backslash
inside a String.

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sandy - 10 Mar 2005 10:22 GMT

try this
c:/test/data.txt

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Sameer - 10 Mar 2005 14:07 GMT

It is better if you give it in the form of a URL:

A general URL for HTTP protocol is
http://groups-beta.google.com/group/comp.lang.java.programmer

Like this FILE is also a Protocol.
Why dont you try passing it like this...

file:///C|/test/data.txt
This is the language of web and is less dependant on your OS.

I think this will also do if you type it as (on a windows machine):
C:\\test\\data.txt

-Sameer Shinde

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Java Help -- File I/O

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