How to comment this program using java.doc package desroches.bcs345.hwk.schedule

Question

How to comment this program using java.doc

package desroches.bcs345.hwk.schedule.standalonereport;
/**
*
*/
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.PrintWriter;
import java.util.Scanner;

/**
* @author Gerard Desroches
*
*/
public class ReadFile {

/**
* @param args
*/
@SuppressWarnings("resource")
public static void main(String[] args) {
  Scanner S = new Scanner(System.in);
  System.out.print("Enter input file name:");
  String fileName = S.nextLine();
  try {
   Scanner fileInput = new Scanner(new FileReader(fileName));
   System.out.print("Enter output file name:");
   fileName = S.nextLine();
   PrintWriter outputFile = new PrintWriter(new File(fileName));
   String firstName = fileInput.nextLine();
   String lastName = fileInput.nextLine();
   // The program should always work for a properly formatted input
   // file. You should use a
   // loop to read in the data. Each time through the loop you should
   // process one record from
   // the file (read it in, do any necessary calculations, and write it
   // out). I may test your
   // program with an input file that contains a different number of
   // records then the file you
   // used as input to your program (for example 20 instead of 12). If
   // the program does not
   // work on my input file then it will be marked as incorrect.
   outputFile.println("   Schedule Report");
   outputFile.println("   ---------------");
   outputFile.println();
      outputFile.println("First: "+firstName);
      outputFile.println("Last: "+lastName);
      outputFile.println(" M D    Y Hr Mn Pd Category     Description");
      outputFile.println(" - -    - -- -- -- --------     -----------   ");
   int pmCount=0;
   int amCount=0;
      while (fileInput.hasNext()) //
   {
    int Month=fileInput.nextInt();
    int Day= fileInput.nextInt();
    int Year = fileInput.nextInt();
    int Hour = fileInput.nextInt();
    int minute = fileInput.nextInt();
    fileInput.nextLine();
    String period= fileInput.nextLine();
    if(period.equals("PM"))
    {
     pmCount++;
    }
    else
    {
     amCount++;
    }
    String Category = fileInput.nextLine();
    String Description = fileInput.nextLine();
    outputFile.printf("%02d %02d %4d %02d %02d %2s %-12s %-40s",
      Month,Day,Year ,Hour,minute,period,Category,Description );
    outputFile.println();
   }
   outputFile.println();   
   outputFile.println("Summary");
   outputFile.println("-------");
   outputFile.println("AM appointments: "+amCount);
   outputFile.println("PM appointments: "+pmCount);
   fileInput.close();
   outputFile.close();

  } catch (FileNotFoundException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

}

Explanation / Answer

/**
* Java API
*/
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.PrintWriter;
import java.util.Scanner;

/**
* @author Gerard Desroches
*
*/
public class ReadFile{
   /**
   * @param args
   */
   @SuppressWarnings("resource")
   public static void main(String[] args){
       /**
       * Ask user for a file to open
       */
       Scanner S = new Scanner(System.in);
       System.out.print("Enter input file name: ");
       String fileName = S.nextLine();
      
       try{
           /**
           * Open the file specified by user
           */
           Scanner fileInput = new Scanner(new FileReader(fileName));
           /**
           * Ask user for output file
           */
           System.out.print("Enter output file name: ");
           fileName = S.nextLine();
           /**
           * Open file Name
           */
           PrintWriter outputFile = new PrintWriter(new File(fileName));
           /**
           * Reading data from file;
           */
           String firstName = fileInput.nextLine();
           String lastName = fileInput.nextLine();
          
           /**
           * Write to another file in proper format
           */
           outputFile.println(" Schedule Report");
           outputFile.println(" ---------------");
           outputFile.println();
           outputFile.println("First: "+firstName);
           outputFile.println("Last: "+lastName);
           outputFile.println(" M D Y Hr Mn Pd Category Description");
           outputFile.println(" - - - -- -- -- -------- ----------- ");
           int pmCount=0;
           int amCount=0;
           /**
           * Read other data from file
           */
           while (fileInput.hasNext()){
               int Month = fileInput.nextInt();
               int Day = fileInput.nextInt();
               int Year = fileInput.nextInt();
               int Hour = fileInput.nextInt();
               int minute = fileInput.nextInt();
               fileInput.nextLine();
               String period = fileInput.nextLine();
               if(period.equals("PM")){
                   pmCount += 1;
               }
               else{
                   amCount += 1;
               }
               String Category = fileInput.nextLine();
               String Description = fileInput.nextLine();
               /**
               *    Writing Data to file
               */
           outputFile.printf("%02d %02d %4d %02d %02d %2s %-12s %-40s",Month,Day,Year ,Hour,minute,period,Category,Description );
               outputFile.println();  
           }
           /**
           * Writing Data to file
           */
           outputFile.println();
           outputFile.println("Summary");
           outputFile.println("-------");
           outputFile.println("AM appointments: "+amCount);
           outputFile.println("PM appointments: "+pmCount);
           /**
           * Close Both file descriptors
           */
           fileInput.close();
           outputFile.close();
       }
       catch (FileNotFoundException e){
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
   }
}

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