Unit #11: Programming Assignment#13

Total Points: 10

Problem #1:

Modify the solution to Example Program #1 such that, instead of simply randomly drawing lines, the program randomly also draws rectangles and ovals.

Add the following to “paintComponent” method:

· Randomly generate a number between 1 and 3:

a) If the number generated is 1, draw the line as described in Example Problem #1

b) If the number generated is 2, draw a rectangle

o g.fillRect (int x, int y, int length, int width) - derscribes the x and y coordinates of the top left corner and the length and width of the rectangle.

c) If the number generated is 3, draw an oval

o g.fillOval (int x, int y, int length, int width) – describes the x and y coordinates of the top left corner and the length and width of the rectangle in which the oval is inscribed.

Problem #2:

In this program, you will implement a graphic user interface (GUI) for a login screen. Your GUI will receive input for login and password from the user and perform several checks on them as described below:

· Reference Program

The graphic objects that make up the GUI are as below:

· A JLabel with the text, “Login”

· A JTextField for entering the login

· A JLabel with the text, “Password”

· A JTextField for entering the password

· A JButton with the text, “Login”.

Once you enter the login and password and press the “Login” button, your program should inform the user with several messages as specified below:

· If the user does not enter any input in the text field for login, your program should display a window with the message, “No login was entered”.

· If the user does not enter any input in the text field for password, your program should display a window with the message, “No password was entered”.

· If the user enters a login name and password:

a. Check if the login name contains at least one uppercase letter and at least one number character (0-9).

b. Check if the password contains at least one uppercase letter and at least one number character (0-9).

c. If the login name does not contain at least one uppercase letter and at least one number character (0-9), your program should display a window with the message, “Login must contain at least one letter from A-Z and 0-9 ".

d. If the password does not contain at least one uppercase letter and at least one number character (0-9), your program should display a window with the message, “Password must contain at least one letter from A-Z and 0-9 ".

e. If both login name and password contain at least one uppercase letter and at least one number character (0-9), your program must check if the login name has already been taken. If yes, your program should display a window with the message, “Login name has been taken. Choose another name”. If no, your program should display a window with the message, “Login and password are created”.