write to file with filereader/filewriter

[LennyKosmos]

so basically what i want to do is add data(variables namn, efternamn and personnumer, which means name, lastname and social security number) to a file.. i managed to update a file but i just want to add a a person to this file, and nothing else... heres what i got so far:

import java.io.*;
import javax.swing.*;

public class Kund {
	private String namn, efternamn, personnummer;
	private String Kundfil="Kunder.txt";
	private String temp="tmp.txt";

public void uppdatera(String angenamn)throws IOException{
		[B]FileReader X = new FileReader(Kundfil);[/B]
		FileWriter Y = new FileWriter(temp);
		BufferedReader input = new BufferedReader(X);
		PrintWriter stream = new PrintWriter(Y);
		[B]while((namn=input.readLine())!=null){
			efternamn = input.readLine();
			personnummer = input.readLine();[/B]
			if(namn.equals(angenamn)){
				namn=JOptionPane.showInputDialog("Ange nytt namn");
				efternamn=JOptionPane.showInputDialog("Ange nytt efternamn");
				personnummer=JOptionPane.showInputDialog("Ange nytt personnummer");			
			}
			stream.println(namn);
			stream.println(efternamn);
			stream.println(personnummer);
		}
		input.close();
        stream.close();
        kopierafiler(temp, Kundfil);
        File f=new File(temp);
        f.delete();
	}
	
	public void kopierafiler(String fileIn, String fileOut) throws IOException{
		FileReader kopieraFR = new FileReader(fileIn);
		FileWriter kopieraFW = new FileWriter(fileOut);
		BufferedReader inputStream = new BufferedReader(kopieraFR);
        PrintWriter outputStream = new PrintWriter(kopieraFW);
        String rad;
        while ((rad = inputStream.readLine()) != null) {
            outputStream.println(rad);
        }
        inputStream.close();
        outputStream.close();
	}
public static void main (String[] args)throws IOException{
	String angenamn;
		Kund X = new Kund();
		angenamn=JOptionPane.showInputDialog("ange namn");
		X.läggtillkund();
		//new Order();
		
	}
	
	
}

thanks in advance guys, this forum has helped me tremendously and i hope i can give it back some day.. but for now, im learning!

i suspect that the bold parts isnt required for writing to a file? i dont dare to remove any more code, ive tried, and it went bad :confused:

[JosAH]

so basically what i want to do is add data(variables namn, efternamn and personnumer, which means name, lastname and social security number) to a file.. i managed to update a file but i just want to add a a person to this file, and nothing else...

Do you want to append to an existing file, e.g. when you have file A B C and want to append a D you want your new file to be A B C D? If so, read the API documentaton the FileWriter (or FileOutputStream) class; it has a constructor that creates one that appends to an already existing file.

i suspect that the bold parts isnt required for writing to a file? i dont dare to remove any more code, ive tried, and it went bad :confused:

Programming is not sculpturing; a program has to do what it has to do; everything you take away from it is more like an amputation ;-)

kind regards,

Jos

[LennyKosmos]

oh yeah

public void läggtillkund() throws IOException{
FileWriter x = new FileWriter(Kundfil, true);

PrintWriter Y = new PrintWriter(x);
Y.print("");
Y.println("xxxx");

Y.close();


}

fixed, thanks alot josah <3

[JosAH]

		Y.print("");

You're welcome of course but there is no reason to print nothing.

kind regards,

Jos