import java.io.*;


/**
 * Files    ---    read from a file and writes to another.
 * @author         Blanca J. Polo
 */
public class Files{

  /**
   * Files Reads the contents of a file and saves them into another file
   * We use a while loop to iterate through the file because we do not
   * know if the file is empty or has one or many entries.
   * We also count the lines copied.
   * @param arg A string array containing the command line arguments.
   * @return No return value.
   * @exception Exception If the file is not found.
   */

   public static void main (String arg[ ]) throws Exception{

	//variable declaration for the input file
        //note that variables are declared but not initialized

      try{
          //the Input file, we are reading from here
	  boolean bFileFound = false;  //to check if input file exists 
          File f = new File("inputFile.txt");
          FileInputStream fis = new FileInputStream(f);
          InputStreamReader isr = new InputStreamReader(fis);
          BufferedReader br = new BufferedReader(isr);

          //the Output file, we are writing to it
          File fout = new File ("outputFile.txt");
          FileOutputStream fos = new FileOutputStream (fout);
          PrintStream ps = new PrintStream(fos);

          int count = 0;
          String s = "";

           s= br.readLine( ); 	   //reading first line from Input File

           while (s!=null){
   	       count++;	          //counting lines copied
               ps.println(s);        //writing to the output file
               s= br.readLine( );    //reading from input file
           }  

	   System.out.println("The input file used is inputFile.txt");
	   System.out.println("The output file is outputFile.txt");
  	   System.out.println("File copy done, "+ count + " lines were copied");

      }//try ends
      catch(FileNotFoundException fnfe){
	  System.out.println("Input file does not exist, please create it.");
	  System.out.println("File name should be inputFile.txt");

      } //catch ends
    } //main

}  //class