1. HELPIDO.COM
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PRG/421 Java Programming II - Week 3
DISCUSSION QUESTION # 1
Think of a programming task—other than the individual or team assignments in this course—in
which you would choose to use an exception handler. Write the code for the try -catch block. Explain
the activity and your code.
DISCUSSION QUESTION # 2
Think of a programming task—other than the individual or team assignments in this course—in
which you would choose to use a data file. Write the code to read or write the file. Explain the
activity and your code.
DISCUSSION QUESTION # 3
What are the advantages and disadvantages of sequential and random access files?
Provide an example in which a sequential file is a better choice than a random access file. Explain
why.
Provide an example in which a random access file is better than a sequential file. Explain why.
LEARNING TEAM
Create a GUI-based program to accept name of donor, name of charity, and amount of pledge from
the user.
Display a list of entries in a JTextArea or JTable.
Submit the .java source file for this program.
INDIVIDUAL ASSIGNMENT
This is a two-part assignment.
Part 1
Design, implement, test, and debug a program with a JFrame that allows the user to enter a series
of contacts’ names, ages, e-mail addresses, and cell phone numbers, and creates a file from the

2. entered data. Validate the age entry to ensure that it is numeric and between 0 and 120. Include
information for three to five contacts.
Part 2
Design, implement, test, and debug a program that reads the file you created by the list in Part 1
and displays the records in a JFrame. You may either display all entries in the list at once or display
them one at a time; the user interface is up to you. Protect against not being able to open the file.
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