Opening a file

Question

So I'm making a program that opens a file that needs to be processed once opened. I've already opened the file on my code. Here is what I've done so far:

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
{
public static void main(String[] args)
{
try {
File myObj = new File("random.txt");
Scanner myReader = new Scanner(myObj);
while (myReader.hasNextLine()) {
String info = myReader.nextLine();
System.out.println(info + " ");
}
myReader.close();
} catch (FileNotFoundException e) {
System.out.println("Something's gone wrong");
e.printStackTrace();
}
}
}

However, it needs to to do the following as well:

- get the original file name (with or without path) from the user.
- specify the output file name (with or without path).
- allow the user to set the field width and set the precision (after decimal point).
- allow the user to set how many columns on each line (must be from 1 to 5)

The new file should not be created until:
- the input file already exists
- the destination file does not exist
- the field width is specified
- the precision is specified, and
- the number of columns is in the range of 1 to 5

I'm struggling heavily on that assignment. Can someone help me on that please?

Answer 1

Also, the “random.txt” is the file that I’m processing. It is a file full of floating numbers. If you guys want to, I can post it.