Java

TOPIC 20 – JAVA COLLECTIONS II - SETS

LESSON WORK

QUESTION 1

Use either HashSet or TreeSet to create your own Set data structure. Try the different methods to make sure you know how it works.

QUESTION 2 (SCENARIO)

You work for Donald Trump. You are one of 152 employees. Mr. Trump is so happy with all of the workers' production that he is giving away a car to a lucky worker. He has decided to pick a number between 1 and 152 and get each employee to guess a number. The employee with the correct number wins.

Mr. Trump has asked you to write a program that will simply ask each employee for a number. It will output "YOU WIN" if the correct number is guessed or "YOU LOSE" if the wrong number is guessed. However, the program also needs to make sure that a user doesn't guess a previously guessed number and should ouput "NUMBER NOT AVAILABLE, PLEASE GUESS ANOTHER".

Furthermore, the Vice President of the company secretly approached you to make sure your program can work for a different number of employees in case Mr. Trump goes on a firing spree before he gives the car away. (This will also allow us to test for a small number.)

Note: You must use a set.

SAMPLE OUTPUT FOR TOTAL OF 5 EMPLOYEES

Employee 1, here are the numbers that you can choose from:

1 2 3 4 5

Please choose a number.

2

YOU LOSE

==========

Employee 2, here are the numbers that you can choose from:

1 3 4 5

Please choose a number.

5

YOU LOSE

==========

Employee 3, here are the numbers that you can choose from:

1 3 4

Please choose a number.

5

NUMBER NOT AVAILABLE

Please choose a number.

3

YOU LOSE

==========

Employee 4, here are the numbers that you can choose from:

1 4

Please choose a number.

4

YOU WIN