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Thread: describe this program code by code ....

  1. #1
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    Default describe this program code by code ....

    import java.util.*;
    import java.io.*;
    class StudAccount {
    public static void main (String[] args)throws IOException {
     
     TreeSet currAccounts = new TreeSet();
     TreeSet oldAccounts =  new TreeSet();
     TreeSet gradAccounts = new TreeSet();
     TreeSet newAccounts =  new TreeSet();
           try
           {
       readAccounts
       ("curraccounts.txt", currAccounts);
       readAccounts
       ("oldaccounts.txt", oldAccounts);
     
       gradAccounts.addAll(oldAccounts);
       gradAccounts.removeAll(currAccounts);
       newAccounts.addAll(currAccounts);
       newAccounts.removeAll(oldAccounts);
           }
      catch(IOException ioe)
       {
       System.out.println("Cannot open file");
       System.exit(1);
       }
       FileOutputStream out1;
                   PrintStream p1;
       FileOutputStream out2;
                   PrintStream p2;
                   try
                    {
       out1 = new FileOutputStream("gradaccounts.txt");
       out2 = new FileOutputStream("newaccounts.txt");
     
         p1 = new PrintStream( out1 );
         p2 = new PrintStream( out2 );
                           p1.println (gradAccounts);
         p2.println (newAccounts);
                           p1.close();
                           p2.close();
                    }
                   catch (Exception e)
                     {
                           System.err.println ("Error writing to file");
                     }
     System.out.println("The people who have graduated are" + gradAccounts);
     System.out.println("The people who are new" + newAccounts);
        }
    public static void readAccounts(String filename, TreeSet Accounts)
       throws IOException
         {
     Scanner sc = new Scanner(new FileReader(filename));
       String id = null;
       String name = null;
       String cgpa = null;
     
     while (sc.hasNext())
        {
    id = sc.next();
    name = sc.next();
    cgpa = sc.next();
       Accounts.add(name);
            }
            }
    }
    Last edited by helloworld922; October 30th, 2011 at 12:39 AM.


  2. #2
    Administrator copeg's Avatar
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    Default Re: describe this program code by code ....

    Please see the link in my signature entitled 'getting help'

    Edit: and that link applies to every one of your other posts as well. I would also encourage you to read the following: http://catb.org/~esr/faqs/smart-questions.html
    Last edited by copeg; October 29th, 2011 at 11:09 AM.

  3. #3
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    Default Re: describe this program code by code ....

    Well it seems you don't know the Rules of this forum!

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