Re: Frustrated trying to Read File
In article <1161533791.438405.108330@e3g2000cwe.googlegroups.com>,
bH <bherbst65@hotmail.com> wrote:
[ snip ]
Thanks to both of you for your replies.
Seems that the problem is I am using a prehistoric iBook (1999 version)
with OS 9.2 and Java 1.0.3. It's a mini dinosaur. The first issue
seems to be a problem in that it has no "import" that connects with
the entries FileInputStream and BufferedReader.
The second issue that the OS and Java will not "read" files even if I
use a simplified version that complies with no error which is shown
below:
import java.io.File;
import java.io.RandomAccessFile;
import java.io.IOException;
public class DemoRandomAccessFile {
private static void doAccess() {
try {
File file = new File("NameAgeWeightFile.txt");
RandomAccessFile raf = new RandomAccessFile(file, "rw");
// Read a character
byte ch = raf.readByte();
System.out.println("Read first character of file: " +
(char)ch);
// Now read the remaining portion of the line.
// This will print out from where the file pointer is
located
// (just after the '+' character) and print all remaining
characters
// up until the end of line character.
System.out.println("Read full line: " + raf.readLine());
// Seek to the end of file
raf.seek(file.length());
// Append to the end of the file
raf.write(0x0A);
raf.writeBytes("This will complete the Demo");
raf.close();
} catch (IOException e) {
System.out.println("IOException:");
e.printStackTrace();
}
}
public static void main(String[] args) {
doAccess();
}
}
Well, the above code compiles and executes okay on a Linux system
running a 1.5 version of Java. That doesn't help you, maybe,
but at least indicates that the code isn't hopelessly broken?
Now, after running it, if I open NameAgeWeightFile.txt in a text
editor I notice that the line added by the writeBytes doesn't end
in a line-end character, which seems a little wrong, but it *is*
what the code said to do. Something else that seems a little wrong
is the write of a 0x0A character, which is the line-end character
on Unix systems but not on Windows or Mac, each of which have their
own conventions ....
I need to figure out how to write a text file, one that this Java will
recognize: I have tried to do various forms of text files that are
saved using the name of "NameAgeWeightFile.txt (Simple text, Claris
Works, Appleworks etc ) then placing it in the same folder as the java
program, ..... , then use the above program to read it, But will not
read it :(.
It might help if you said you mean by "will not read it" -- do
you get an exception? output other than what you think you should
get? something else??
--
B. L. Massingill
ObDisclaimer: I don't speak for my employers; they return the favor.