important java question?

Question

import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintStream;


class word {
         
        public static void main(String args[]) 
        throws FileNotFoundException {
         int loop;
         loop = 2;
         
         Scanner written = new Scanner(new File("type.txt"));
         Scanner myscanner = new Scanner(System.in);
         String karim;
         String space;
         String reader;
         reader = written.nextLine();
         space =" ";
         System.out.println(reader);
         
         
         
         while (loop != 0) {
         
         
         
         	
         karim = myscanner.nextLine();
         
         
         
         
         
         
         
         PrintStream diskWriter =
                       new PrintStream("type.txt");
 	     
         diskWriter.print(reader+space+karim );
       
       	
         }     
}
}
why can't i edit what was written in the file from my program or delete what i wrote

McFate · Accepted Answer

Assuming you're asking about the output file that your Java program write (rather than your Java source file itself)... Java's not really good about overwriting portions of files in-place.  Not sure why that is.

At one place I work we just made a utility class that can load the entire contents of a file to a list of Strings, and then write the list of Strings to a file.  Then you read the file into memory, modify the list of Strings however you want, and write it back out.

modulo_function · Answer

You're probably writing that file using permissions that won't allow an edit or delete.

I think that the problem is the system that you're doing this on.

Can you open the file?  Using what program?  What operating system?

+add
Ok, I tried your program.  You never reset loop.  But I was able to get it to take keyboard input and write to the file.  I was able to open and see what I wrote.

? · Answer

The program that you're using (Notepad, or whatever) probably got set to read only maybe? What program are you writing the code in?

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important java question?

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