/**
This program shows how to write (create) a txt file.
To create a txt file, we use mainly two calsses:
PrintWriter and FileWriter:

FileWriter TheFileToWrite = new FileWriter (NameOfFile);
PrintWriter TheOutputFile = new PrintWriter (TheFileToWrite);
Or, in one line:
PrintWriter TheOutputFile = new PrintWriter (new FileWriter (NameOfFile));

To write, we apply the method print or println to the object TheOutputFile of the 
Java predefined class PrintWriter:
TheOutputFile.println(" ") ;

We use TheOutputFile.close(); to close the file.

*/

/*
In this example, we write the file FibonacciN.txt  of the first N+1 integers.
*/



import java.io.*;

public class WriteFiles {

static int Fibonacci (int n){
	if (n <=1)
	return n;
	else 
	return Fibonacci (n-1) + Fibonacci (n-2);
}

static void FileFibonacci (int nbMax, String TheFile)throws IOException {
PrintWriter ThisFile = new PrintWriter ( new FileWriter(TheFile));
for (int k = 0; k<= nbMax; k++)
	ThisFile.println ("Fibonacci(" + k + ")\t" + Fibonacci(k));
	ThisFile.close();
	System.out.println ("The file :" + TheFile + " is created.");
 }
 
 public static void main (String [] args) throws IOException {
 if (args.length == 2){
	int nbMax = Integer.parseInt(args[0]);
	String TheFile = args[1];
	FileFibonacci(nbMax, TheFile);
 }
 }




/*
Compile: 
C:\Java> javac WrieFiles.java

Execute: 
First argument = 10 , We will have then Fibonacci values of the eleven first integers,
 Second argument: Fibonacci10.txt : the file will be written as  Fibonacci10.txt.
C:\Java> java WriteFiles 10 Fibonacci10.txt
The file :Fibonacci10.txt is created.

We can open the file Fibonacci10.txt to see:
Fibonacci(0)		0
Fibonacci(1)		1
Fibonacci(2)		1
Fibonacci(3)		2
Fibonacci(4)		3
Fibonacci(5)		5
Fibonacci(6)		8
Fibonacci(7)		13
Fibonacci(8)		21
Fibonacci(9)		34
Fibonacci(10)		55
*/


/*Recall:
C:\Java> java Class Fisrt_arg Second_arg(file)
*/


PrintWriter TheOutputFile = new PrintWriter (new FileWriter (NameOfFile));