code in java

public class Bill { /* * Instance Variables all set to private */ private String biller; private String billAcct; private double billAmtDue; private String billDueDate; private String billDesc; private String billPaidDate; /* * Constructors in class Bill will contain a null constructor and a * full constructor */ public Bill( ) { // Null Constructor empty } // end of null constructor public Bill ( String owedTo, String owedFor, double owedAmt, String owedWhen, String owedDesc, String owedPaidDate ) // constructor calling set method for each instance variable { setBiller( owedTo ); setBillAcct( owedFor ); setBillAmtDue( owedAmt ); setBillDueDate( owedWhen ); setBillDesc( owedDesc ); setBillPaidDate( owedPaidDate ); } // End Full Constructor /* * declaring set Methods for class variables */ public final void setBiller( String owedTo ) { biller = owedTo; } // end setBiller public final void setBillAcct( String owedFor ) { billAcct = owedFor; } // end setBillAcct public final void setBillAmtDue ( double owedAmt ) { billAmtDue = owedAmt; } // end setBillAmtDue public final void setBillDueDate ( String owedWhen ) { billDueDate = owedWhen; } // end setBillDueDate public final void setBillDesc ( String owedDesc ) { billDesc = owedDesc; } // end setBillDesc public final void setBillPaidDate ( String owedPaidDate ) { billPaidDate = owedPaidDate; } // end setBillPaidDate /* * Declaring get Methods for class variables * */ public final String getBiller ( ) { return biller; } // end getBiller public final String getBillAcct ( ) { return billAcct; } // end getBillAcct public final double getBillAmtDue ( ) { return billAmtDue; } // end getBillAmtDue public final String getBillDueDate ( ) { return billDueDate; } // end getBillDueDate public final String getBillDesc ( ) { return billDesc; } // end getBillDesc public final String getBillPaidDate ( ) { return billPaidDate; } // end getBillPaidDate // END GET METHODS // Insering toString method and declaring it private public String toString ( ) { String time; time = String.format(\"%n%s is owed $%.2f on account %s by %s for %s. %n%s\", getBiller (), getBillAmtDue (), getBillAcct (), getBillDueDate (), getBillDesc (), getBillPaidDate () ); // if else statement to see if bill has been paid if(time.equals(\"\")) { time += \"The bill has not yet been paid.\"; } else { time += \"The bill was paid on \" +billPaidDate; } //end if else statement return time; } // END toString } //end Bill class

/*

* Lab 11

*

* This code will read in a \"flat\" file containing data items for use in instantiating Bill objects.

* A variety of Bill objects will be instantiated based on the input values.

* Those objects will be added to a (globally declared) generic collection for holding/serialization

* Once all objects have been instantiated, the (globally declared) collection will be output

* as an XML-serialized document.

*/

// ---------------------- IMPORTS for File Handling/Management ------------------------------

// -------------------- IMPORTS for Collection Handling/Management ---------------------------

import java.util.List; // Interface provides methods for manipulating objects by index

import java.util.ArrayList; // Class implements interfaces List & Collection

// --------------------------- IMPORT for XML Serialization ---------------------------------

public class CreateBillObjects_Batch

{

/*

* Declared globally, as it will be needed in both sub-methods. This avoids having to pass the reference

* among methods.

*/

private static List billsCollection = new ArrayList( );

public static void main( String[] args )

{

readInput_BuildBills( );

serializeBills( );

} // end main

private static void readInput_BuildBills( )

{

/*

* 1. Set up \"holding spaces\" for various objects and variables we will use in the loop

* 2. Declare and instantiate an object for input of the data \"flat file\" inputBills.txt

* 3. Read each line from the input file, and using the data provided, instantiate a Bill object

* 4. Add the new Bill object to the billsCollection (for later serialization)

* 5. When all input has been read, remember to close the input file!!

*/

Bill newBill; // This is a \"holding space\" for the Bill objects we instantiate

try // Because \"stuff\" can happen during I/O...

{

/*

* Declare and instantiate a Scanner object to read the input file.

*/

// Modify Scanner object to use a comma (,) as the delimiter between inputs

inputFile.useDelimiter( \",\" );

while( inputFile.hasNext( ) )

{

/*

* Read input items from the file, and use that data to instantiate a new Bill object

*/

newBill = new Bill( inputFile.next( ),

inputFile.next( ),

inputFile.nextDouble( ),

inputFile.next( ),

inputFile.next( ),

inputFile.next( ) );

// Now that the new Bill object has been instantiated, add it to the (global) collection

billsCollection.add( newBill );

} // end while loop

/*

* ALWAYS CLOSE your file!

*/

} // end try block

catch( IOException xcptn )

{

System.err.printf( \"There was an error involving the INPUT file. Refer to exception type & message for info.%n%s%n%s%n\",

xcptn.getClass( ).getName( ),

xcptn.getMessage( ) );

xcptn.printStackTrace( );

} // end catch IOException

} // end readInput_BuildBills

private static void serializeBills( )

{

/*

* Complete the XML Serialization process using the billsCollection

*

* 1. Instantiate a local copy of the \"helper\" code - this is necessary for the XML serialization

* to complete properly.

* 2. Declare and instantiate an output file

* 3. Serialize the collection

*/

/*

* Declare and instantiate a local copy of the \"helper\" code here

*/

try // Because \"stuff\" can happen during I/O...

{

/*

* Declare and instantiate a BufferedWriter object for output. Use file name \"outputBills.xml\"

*/

/*

* Copy the Bill object references from the (globally declared) collection to the collection in the

* \"helper\" code. NOTE: This does not duplicate Bill objects, but simply duplicates references to

* those objects.

*/

bills.getBills( ).addAll( billsCollection );

/*

* Execute the actual serialization process using local copy of the \"helper\" code instantiated above

* and the the BufferedWriter object declare/instantiated above

*/

} // end try

catch( IOException xcptn )

{

System.err.printf( \"There was an error involving the OUTPUT file. Refer to exception type & message for info.%n%s%n%s%n\",

xcptn.getClass( ).getName( ),

xcptn.getMessage( ) );

xcptn.printStackTrace( );

} // end catch IOException

} // end serializeBills

} // end CreateBillObjects_Batch.