Programming and Problem Solving with Java

CASE STUDY^361

Responsibility Algorithms:The only responsibility that needs expanding is “Process en-
tries”. We must read the entries back in, prompt for and read a birthday, and write out
the Entryobject. Because we wrote the file one string per line, reading the data back in
is easy. Once we have an object of the class EntryPlus, we can write it to a new file using
ObjectOutputStream.

Get an Entry

Get Name object

Get Address object

Get Phone object

Process Entries

whilemore entries

Get an entry

Get birthday

entryPlus = new EntryPlus(Name, Address, Phone, Date)

Write entry on outFile

Class Name: PlusDriver Superclass: Subclasses:

Responsibilities Collaborations

Prepare input files BufferedReader

Prepare output files ObjectOutputStream

Process entries EntryPlus, Name, Address, Phone, Date

Close files BufferedReader ObjectOutputStream

Class Name: EntryPlus Superclass: Entry Subclasses:

Responsibilities Collaborations

Create (name, address, phone, date) Name, Address, Phone, Date

Create ( ) Name, Address, Phone, Date

Know birthday

return Date

Write to file (outfile) ObjectOutputStream