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Please help with swiching program to inher

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brittany willis

Posts: 1
Nickname: brittrock
Registered: Apr, 2011

Please help with swiching program to inher

Posted: Apr 21, 2011 7:12 PM

This is the two program I have to do but I have to take this and change it in to these two. Please help me understand what I have to do. Thank You

http://courses.muskingum.edu/@@/E36DA67BBD03BD5AB2A86906FB09CE0B/courses/1/SP11-CPSC-211-1/content/_36902_1/Lab3.pdf

http://courses.muskingum.edu/@@/E36DA67BBD03BD5AB2A86906FB09CE0B/courses/1/SP11-CPSC-211-1/content/_38016_1/Lab4.pdf

import java.util.Scanner;

public class Transaction
{
private int id;
private String type;
private double amount;

public boolean readTransaction (Scanner transScanner)
{
boolean result = false;

if (transScanner.hasNext())
{
id = transScanner.nextInt ();
type = transScanner.next ();
amount = transScanner.nextDouble ();

result = true;
}

return result;
}

public int getId()
{
return id;
}

public void setId(int id)
{
this.id = id;
}

public String getType()
{
return type;
}

public void setType(String type)
{
this.type = type;
}

public double getAmount()
{
return amount;
}

public void setAmount(double amount)
{
this.amount = amount;
}
}

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;

public class Lab2
{
public static void main (String [] args)
{
File custFile = new File ("customer.dat");
File transFile = new File ("transaction.dat");
File oldCustFile = new File("oldcustomer.dat");

// Make sure the files exist
if (checkForFileErrors (custFile, transFile))
return;

// Rename the customer file
custFile.renameTo(oldCustFile);

// Open the files for reading
Scanner custScanner = null;
Scanner transScanner = null;

try
{
custScanner = new Scanner (oldCustFile);
custScanner.useDelimiter("[:\r\n]+");

transScanner = new Scanner (transFile);
transScanner.useDelimiter("[:\r\n]+");
}
catch (FileNotFoundException e)
{
System.out.println ("Cound not open a file for reading");
return;
}

// Open the new customer file for writing
PrintWriter custWriter = null;

try
{
custWriter = new PrintWriter (custFile);
}
catch (FileNotFoundException e)
{
System.out.println ("Cound not open customer.dat for writing");
return;
}

// Process the files
try
{
Customer cust = new Customer ();
Transaction trans = new Transaction ();

// Read the first record of both files
boolean haveCustomer = cust.readCustomer (custScanner);
boolean haveTransaction = trans.readTransaction (transScanner);

// As long as we have customers
while (haveCustomer)
{
// Find transactions that match
while (haveTransaction && trans.getId() < cust.getId())
{
// We have a transaction, and the id is less than the current
// customer id. If we'd had a matching customer for this transaction,
// we wouldn't be reading it here, so this is an error.
System.out.println ("Transaction not matching any customer: id " + trans.getId() + ", type " + trans.getType() + ", amount " + trans.getAmount());
haveTransaction = trans.readTransaction (transScanner);
}

// Process transactions that have the same id
while (haveTransaction && trans.getId() == cust.getId())
{
if (trans.getType().equals("S"))
cust.setBalance(cust.getBalance() - trans.getAmount());

if (trans.getType().equals("P"))
cust.setBalance(cust.getBalance() + trans.getAmount());

haveTransaction = trans.readTransaction (transScanner);
}

// By the time we get here, we've run out of transactions for
// the current customer, so let's write out the customer to
// the new customer.dat
cust.writeCustomer (custWriter);

// And read in the next customer to process
haveCustomer = cust.readCustomer (custScanner);
}

// At this point, we've read through the entire oldcustomer.dat file
// We might still have unmatched transactions left over where the
// transaction id was greater than any of the customer ids, so let's process those

while (trans != null)
{
System.out.println ("Transaction not matching any customer: id " + trans.getId() + ", type " + trans.getType() + ", amount " + trans.getAmount());
haveTransaction = trans.readTransaction (transScanner);
}
}
catch (Exception e)
{
// Not the best way to handle this, but okay for this lab
e.printStackTrace ();
}

// Close the files
custScanner.close ();
transScanner.close ();
custWriter.close ();

}

public static boolean checkForFileErrors (File custFile, File transFile)
{
boolean errorFound = false;

if (! custFile.exists())
{
System.out.println ("No customer.dat found!");
errorFound = true;
}

if (! transFile.exists())
{
System.out.println ("No transaction.dat found!");
errorFound = true;
}

return errorFound;
}
}

import java.io.PrintWriter;
import java.util.Scanner;

public class Customer
{
private int id;
private String name;
private String address;
private double balance;

public boolean readCustomer (Scanner custScanner)
{
boolean result = false;

if (custScanner.hasNext())
{
id = custScanner.nextInt ();
name = custScanner.next ();
address = custScanner.next ();
balance = custScanner.nextDouble();

result = true;
}

return result;
}

public void writeCustomer (PrintWriter custWriter)
{
custWriter.println(id+":"+name+":"+address+":"+balance);
}

public int getId()
{
return id;
}

public void setId(int id)
{
this.id = id;
}

public String getName()
{
return name;
}

public void setName(String name)
{
this.name = name;
}

public String getAddress()
{
return address;
}

public void setAddress(String address)
{
this.address = address;
}

public double getBalance()
{
return balance;
}

public void setBalance(double balance)
{
this.balance = balance;
}
}
Please help

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