This is the final version. It is still your responsibility to check back here for any changes or updates.

.class files for Sample Solution for hw 7 are in the public directory.

This assignment was mistakenly listed as hw 6 for a brief time. It is really hw 7.

Required reading: Savitch text Chapters 12-14. (We will return to cover Chapter 9 in assignment #8. Section 10.2 of Chapter 10 is not covered in this class.) This exercise should be done using only the material from Chapters 1 through 8, plus 11-14.

Due dates: Check the Announcements.

Note you can do this and take an interview without turning in the assignment, as long as it is before the turnin deadline (and until the deadline is announced it is definitely before the deadline.)

Programming: You may work in teams of two students, but once you form a team, you cannot change the team for this assignment. You may work alone if you prefer.


Part I:

Rewrite the program in Display 12.15/page 813 so that it has all of the following changes:


i. Change the class name to MemoSaver2.


ii. There are four buttons instead of five and they are arranged in one row as follows:
------- ------- Save------- Get------- Clear------- Exit
---The buttons are still at the bottom of the GUI with the text area above it.


iii. When the user clicks Save another window appears asking the user if it should be saved as memo 1 or memo 2. This window will have buttons labeled:
------- ------- Memo 1------- Memo 2------- Cancel
------- The buttons have the obvious meaning. When the user saves the text as memo 1, the text area changes so that it says "Memo 1 saved.", and when memo 2 is saved, it changes to "Memo 2 saved." (See Self-Test Exercise 38 on page 818 for a hint.)


iv. When the user clicks Get another window appears asking the user if the user wants to get memo 1 or memo 2. This window will have buttons labeled:
------- ------- Memo 1 ------- Memo 2------- Cancel
------- The buttons have the obvious meaning.


v. When the "Exit" button is clicked, the program ends and the window goes away. The close-window button also ends the program. So, the "Exit" button and the close-window button perform the same action.


vi. In addition to the default constructor, there is also a constructor of the following form:

public MemoSaver2(int lineCount, int charCount)

When this constructor is used, it produces the same display except that the text area has dimensions of lineCount number of lines and charCount number of characters per line.


vii. The text area has line wrap so that if more characters are entered than will fit on the line, then the extra characters automatically go on the next line.


viii. The method main constructs two windows, one using the default constructor and one using the above constructor with parameters 5 and 60 in that order.



Part II:

Write a GUI using Swing that behaves as follows. When the program is run a window appears and asks the user how many lines and how many characters per line, she or he wants for a memo saver. There is a "Cancel" button, If the user clicks the Cancel button or the close-window button, the program ends. More typically, the users enters these two numbers in two text fields. There is a button with the string "Continue" on it.

If the user clicks the "Continue" button, the window disappears and another window appears. This second window is just like the memo saver in Part I, except that the text area has the number of lines and characters per line specified by the user in the previous window. If the user clicks the "Continue" button and the two text fields do not contain well formed positive integers in the ran 1 to 100, then an error window appears. The details of the error window are up to you, but the user must be allowed to reenter the integers in some nice way.

Make the class MemoServer2 from Part I a private inner class of your program class. This way your class will be self-contained. You turn in the file from part II.

Last Update: Feb 18, 2003 (by Nakul Verma)