Hash tables-java coding | Computer Science homework help

 Assignment Description: The goal of this assignment is to work with hash functions and understand the performance of the Division method using open addressing techniques discussed in the slides. Page 2 Write one simple program that uses a fixed set of 50 unique keys stored in an array as follows (Important: hard-code the array content in your program and make sure you have same exact key values below in the same order): int[] keys = {1234, 8234, 7867, 1009, 5438, 4312, 3420, 9487, 5418, 5299,  5078, 8239, 1208, 5098, 5195, 5329, 4543, 3344, 7698, 5412,  5567, 5672, 7934, 1254, 6091, 8732, 3095, 1975, 3843, 5589,  5439, 8907, 4097, 3096, 4310, 5298, 9156, 3895, 6673, 7871,  5787, 9289, 4553, 7822, 8755, 3398, 6774, 8289, 7665, 5523}; The program allows the user to select a hash function, from the menu, to be invoked on the set of keys. Keep it simple as follows: —–MAIN MENU—– 0 – Exit Program 1 – Run HF1 (Division with Linear Probing) 2 – Run HF2 (Division with Quadratic Probing) 3 – Run HF3 (Division with Double Hashing) 4 – Run HF4 (Student-Designed Function) The hash functions are defined below. To keep the implementation simple, design the hash table (call it Table) (of size 50) as a 2D array (50 rows and 2 columns) (int[][] Table = new int[50][2];) The first column stores the keys while the second column stores number of probes used to resolve collisions. After calling the hash function from the menu, the output of the program should display the hash table followed by the sum of all probe values in the table. Declare a separate method in your class, say sumProbes(), to perform this calculation and return the sum of all probes in the table (second column of the table). Note that the total number of probes a hashing function generates indicates the performance level of the function – The smaller the sum of probes the better the hash function. HF1: Declare a separate method HF1() that implements the Division method discussed in the slides with Linear Probing for collision resolution. HF2: Declare a separate method HF2() that implements the Division method discussed in the slides with Quadratic Probing for collision resolution. HF3: Declare a separate method HF3() that implements the Division method discussed in the slides with Double Hashing for collision resolution. For the second hashing function, use the following function and increment (see example in slides)  H2 (key) = 30 – key % 25;  Increment is (key % 50) + j * H2 (key) for j=1, 2, 3, 4, … Note: It is possible that HF3 will not be able to determine and empty index in the hash table for a give key, especially when very few empty entries remain in the hash table. I this care and to avoid entering into an infinite loop, limit number of attempt to locate a key in the hash table to no more than 50 tries. In such case, printout a message like this example: “Unable to has key 43654 to the table”. Page 3 Note this phenomenon happen due to not applying Load Factoring to our table. HF4: Declare a separate method HF4() that implements a hash function of your own design. The sky is your limit. You can come up with your own hash function or take and improve one of the above three functions by either using a different hashing method (other than Division method) or a different collision resolution method. Aim to come up with a function that beats the above three function (i.e., your function generates smallest number of probes for the given set of keys). Note: See the note in HF3 and apply it to you HF4 if necessary. The assignment is very specific and it must be implemented as specified. Any deviation from these requirements is not acceptable and receives no points. No exceptions. Only complete and correct code receives credit. Code must compile and run on its own as received. Using code from outside sources receives NO credit. Format the output following the sample run below. Sample output for format illustration purpose only (Our table is of size 50 elements) Hash table resulted from HF2: Index Key probes ————————  0 4576 0  1 9876 2  2 2341 0  3 8722 3  4 9988 4  5 1111 0  6 3443 1  7 4444 0  8 7788 1  9 2321 0 ———————— Sum of probe values = 11 probes. 

Custom Writings Help
Calculate your paper price
Pages (550 words)
Approximate price: -

Why Work with Us

Top Quality and Well-Researched Papers

We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.

Professional and Experienced Academic Writers

We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.

Free Unlimited Revisions

If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.

Prompt Delivery and 100% Money-Back-Guarantee

All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.

Original & Confidential

We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.

24/7 Customer Support

Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.

Try it now!

Calculate the price of your order

Total price:
$0.00

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.

Essays

Essay Writing Service

No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.

Admissions

Admission Essays & Business Writing Help

An admission essay is an essay or other written statement by a candidate, often a potential student enrolling in a college, university, or graduate school. You can be rest assurred that through our service we will write the best admission essay for you.

Reviews

Editing Support

Our academic writers and editors make the necessary changes to your paper so that it is polished. We also format your document by correctly quoting the sources and creating reference lists in the formats APA, Harvard, MLA, Chicago / Turabian.

Reviews

Revision Support

If you think your paper could be improved, you can request a review. In this case, your paper will be checked by the writer or assigned to an editor. You can use this option as many times as you see fit. This is free because we want you to be completely satisfied with the service offered.