I/O problem

Thread view:

Bob Stroomer - 26 Feb 2004 14:47 GMT

Hi everybody,
I got a question about I/O classes

At school, we have to type for the input/output:

Input in;
Output out;

And in the constructor:

in = new Input()
out = new Output()

I understand how this works.
But now I want to run and compile java-programmes at home. I installed
the sun java sdk kit. And the compiler gives four errors for the
declaration of the input and output class. (Input and Output are
unknown classes)
How can I solve this problem?
Grtz,
Bob

Reply to this Message

Andrew Thompson - 26 Feb 2004 15:00 GMT

> Hi everybody,
> I got a question about I/O classes
[quoted text clipped - 14 lines]
> declaration of the input and output class. (Input and Output are
> unknown classes)

?? or perhaps..
"cannot resolve symbol"

> How can I solve this problem?

Quote the exact message you get.

It seems your school is using some
custom classes to make I/O easier
(Input and Output are not classes
of the core API) - you need to
import them. Something like

import java.net.URL;

Signature

Andrew Thompson
* http://www.PhySci.org/ Open-source software suite
* http://www.PhySci.org/codes/ Web & IT Help
* http://www.1point1C.org/ Science & Technology

Reply to this Message

Andrew Hobbs - 27 Feb 2004 00:26 GMT

> Hi everybody,
> I got a question about I/O classes
[quoted text clipped - 17 lines]
> Grtz,
> Bob

As another Andrew pointed out, your school has provided custom classes to
make your job of learning the java basics easier. What you need to do now
is come to grips with the standard input and output classes so that you are
not reliant on them. You need to consider what sort of input and output you
want in any particular situation.

Have you discovered the Sun tutorials yet.

http://java.sun.com/docs/books/tutorial/

They are a great resource and have basic tutorials and information on just
about every aspect of java you will ever need.

In your case if you need to input from and output to disc then you could
look at this tutorial

http://java.sun.com/docs/books/tutorial/essential/io/index.html

If you want I/O via the screen and a GUI then try this

http://java.sun.com/docs/books/tutorial/uiswing/index.html

Cheers

Andrew

--
********************************************************
Andrew Hobbs PhD

MetaSense Pty Ltd - www.metasense.com.au
Australia

61 8 9246 2026
metasens AntiSpam @iinet dot net dot au

*********************************************************

Reply to this Message

GoGoGoGo - 29 Feb 2004 15:32 GMT

001 package examples.util;
002
003 import java.io.File;
004
005 import org.osdk.util.FileIO;
006
007 /**
008 * Examples for using the FileIO class.
009 *
010 * @license Released under the <a
href="http://www.opensource.org/licenses/lgpl-license.php" >
011 * Lesser GNU Public License (LGPL).</a>
012 * Please refer to the license.txt or the previous
link the LGPL at www.opensource.org.
013 * @copyright (c) 2003 <a href="http://www.osdk.com"

014 * @organization Open Source Developer's Kit
015 * @author Scott Wheeler
016 * @version 0.6
017 * @todo
018 * @history
019 */
020
021 public class FileIOExample {
022
023
024
025 public FileIOExample () {
026
027 }
028
029
030 /**
031 *
032 */
033 public void getDirectoryFiles() {
034
035 FileIO fileReader = null;
036 File[] files = null;
037
038 try {
039
040 fileReader = new FileIO();
041 files =
fileReader.getDirectoryFiles("e:/lucene/documents", "",
true);
042
043 for (int i=0; i < files.length; i++) {
044
045
System.out.println(files[i].getAbsolutePath());
046 }
047
048 }
049 catch (Throwable e) {
050 e.printStackTrace();
051 }
052 }
053
054 public static void main(String[] args) {
055
056 FileIOExample fileIO = new FileIOExample();
057
058 fileIO.getDirectoryFiles();
059
060 }
061 }

Reply to this Message

I/O problem

Free Magazines