Converting .csv file to .txt file...

[aviolently]

Someone help me here cause i dont have any idea on this thing !

[Petr]

can you explain more details. Usually csv file is a txt file.

[aviolently]

this is my code:
and i do not know why it doesnt read .csv file to so im using .txt ... but i need to use csv file cause it is a requirement;;


this is my code;


[QOUTE]

import java.io.*;
import java.awt.*;
public class StudentTableMain {

public static Student[] readFromFile(String filename) throws IOException, ClassNotFoundException {
//reading the data file
ObjectInputStream fileReader = new ObjectInputStream(new FileInputStream(filename));
Student[] m = (Student[]) fileReader.readObject();
fileReader.close();
return m;
}

//main
public static void main(String[] args) {

Student[] students = null;
try {
//reading the data file
students = readFromFile("students.csv");
}
//catching if the file exist or not.
catch (FileNotFoundException e) {
System.out.println("File not found.");
System.exit(0);
} //catching if there's an error.
catch (Exception e) {
System.out.println("An error occured:");
e.printStackTrace();
System.exit(0);
}
// instantiating tabelModel to model. Overwriting // Overidding
tableModel model = new tableModel(students);

view view = new view(model, " +STUDENT TABLE+");
controlCenter controller = new controlCenter (model , view);


view.pack();
view.setVisible(true);
view.setLocationRelativeTo(null);
view.setSize(460,560);

}
}
[/QOUTE]

[Petr]

Oh, You confuse about CSV format and serializations objects.
CSV file is just text file, which has special structure. like that

name;soname;telephone;marks;
petr;petr;1234;5;

And have to just read file by line and create your object. Reading in a *.csv file and loading the data into an Array - Java

[Tolls]

ObjectInputStream reads in objects (ie stuff from Java classes) that have previously been serialised (ie written) out to a file.
Since this format is most definitely not a csv format, then this sort of stream is not at all useful to you.

Use a BufferedReader wrapped around a FileReader. You can look in the API for how they function.

Then read in each line and process it based on the comma separator, turning each into a Student object. Again, I'm sure Google will bring up numerous examples of how to do that.

[aviolently]

ok here is my new code .....

import java.io.*;
import java.util.StringTokenizer;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import java.lang.*;


public class ReaderSample {

public static void main(String[] args) {

try
{
//csv file containing data
String strFile = "students.csv";

//create BufferedReader to read csv file
BufferedReader br = new BufferedReader( new FileReader(strFile));
String strLine = "";
StringTokenizer st = null;
int tokenNumber = 0;

//read comma separated file line by line
while( (strLine = br.readLine()) != null)
{

//break comma separated line using ","
st = new StringTokenizer(strLine, ",");

while(st.hasMoreTokens())
{
//display csv values
tokenNumber++;
System.out.println(st.nextToken());
}

//reset token number
tokenNumber = 0;

}


}
catch(Exception e)
{
System.out.println("Exception while reading csv file: " + e);
}
}

}

[aviolently]

where should i put the data so that my csv file would be converted to .dat file

[Tolls]

And?
What is the problem?
Where are you stuck?

And what on earth does a DAT file have to do with this?

[aviolently]

ok here it goes

These are my problems !
1. Reading a csv file
2.Saving it to a .dat file

thats my problem

[Tolls]

OK.
Read the csv file.
Get that bit working.

[mahoraz]

you can try this method described here
CSV code examples - Java CSV

oh...and *.dat file can contain anything in any format.... you forgot to specify the format in whitch you will save the data in the dat file

[Tolls]

Since I suspect this is a learning exercise I doubt using a CSV reader framework will be looked on as a Good Thing.

[aviolently]

i dont get it at all....

Reading a .CSV and writing or saving it to a .DAT file?

some one help please!