.txt File Handling in Java

[LooN_iE]

package newuser;

import java.io.BufferedReader;
import java.io.FileReader;


public class Main implements ServerConstants {

    public static void main(String[] args) {
		BufferedReader lnr = null;
		String line = null;

                int N=1000;
		int totalRecords = 0;

                String [][] array = new String[N][];

                try {
			lnr = new BufferedReader (new FileReader("LoginData.txt"));

			for (line = lnr.readLine(); line!=null; line = lnr.readLine()) {

				array[totalRecords] = line.split(" , ");
				totalRecords++;
			}

			lnr.close();
		} catch (Exception e) {
			System.out.println("An error has occured: "+e.getMessage());
			//e.printStackTrace();
		}
		for (int i=0;i<totalRecords;i++) {
			for (int j=0;j<array[i].length;j++) {
				System.out.print(array[i][j]+" ");
			}
			System.out.println();
		}
	}
}

Ok so I have this code. The code reads a text file, stores the information into an array then displays the contents on the screen when I run the code. So basically what I have is a .txt file with a list of users e.g:

username, password
matt, 123

What I want the code to do is allow me to enter new users into that text file. I have browsed through the i-net and it seems that the .txt file cannot be just edited. The information has to be stored into an array, and then the extra information I wish to add be added to that array, then the array printed into a new .txt file. How exactly can I modify the code to do this? Any help is appreciated. Thanks

[BestJewSinceJC]

Putting text at the end of an existing file

^ I'm pretty sure using FileWriter with the constructor that has "append" as one of the arguments will allow you to write to a file without deleting its contents first. To use FileWriter:

PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("foo.out")));
The example of PrintWriter can be found here.

I'm going to assume you can take it from here, but if you need any more help, feel free to ask.

[jw45sl]

HELLO CAN U HELP ME

[ncmathsadist]

The FileWriter has an optional second boolean argument. If you pass it true, it will operate in append mode.