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This is the code below:

package hashset;

import java.util.Iterator;

public class MySet {

// implements a set using a separate chaining hash table

privateclass Node {

private Integer element;

private Node next;

private Node(Integer e, Node n) {

element = e;

next = n;

}

}

private Node table[]; //an array of linked list

privateinttableSize; //current number of lists in the table

privateintnumElements; //number of elements in the set

 

privatefinalintprimes[] = {7, 23, 59, 131, 271, 563, 1171,

2083, 4441, 8839, 16319, 32467,

65701, 131413, 263983, 528991};

privateintprimeIndex; //last prime used

 

privateint nextPrime(intp) {

//finds the next prime from the list above

//used for resizing and the initial size

while (primes[primeIndex] <= p)

primeIndex++;

returnprimes[primeIndex];

}

public MySet(ints) {

//s is a hint for the initial size

primeIndex = 0;

tableSize = nextPrime(s);

table = new Node[tableSize];

numElements = 0;

}

 

//return the hash function value for k

privateint hash(Integer k) {

 

return Math.abs(k.hashCode() % tableSize);

}

 

//"double" the table size and reinsert the values stored in the

//current table. the table size should remain prime

privatevoid resize()

{

// Double the table size

intnewSize = nextPrime(tableSize * 2);

Node[] newTable = new Node[newSize];

for (inti = 0; i < tableSize; i++) {

Node current = table[i];

 

while (current != null) {

Node next = current.next;

intindex = hash(current.element);

current.next = newTable[index];

newTable[index] = current;

current = next;

}

}

table = newTable;

tableSize = newSize;

 

}

//returns true when e is in the set, otherwise returns false

publicboolean find(Integer e)

{

intindex = hash(e);

Node current = table[index];

while (current != null) {

if (current.element.equals(e)) {

returntrue;

}

current = current.next;

}

returnfalse;

 

}

//if e is not in the set add e to the set otherwise the set does not change

//if after adding the new element numElements > 2*tableSize then call resize

publicvoid addElement(Integer e)

{

intindex = hash(e);

Node current = table[index];

while (current != null) {

if (current.element.equals(e)) {

return; // already in the set

}

current = current.next;

}

// not found, add to the set

Node newNode = new Node(e, table[index]);

table[index] = newNode;

numElements++;

if (numElements > 2 * tableSize) {

resize();

}

}

//returns a string representation for the set

//the string representation of the set is { followed by a comma delimiter list of set

//elements followed by a }. The string for the empty set is {}

//For example, {1,2,3}.

//Note that you SHOULD NOT have any spaces in your String

/*

* Example:

* table[0]: 2 -> 4

* table[1]: 1 -> 3

*

* The string representation of this set is {2,4,1,3}

*/

//toString method

public String toString() {

StringBuilder sb = new StringBuilder();

sb.append("{");

MySetIterator iter = new MySetIterator();

while (iter.hasNext()) {

sb.append(iter.next());

if (iter.hasNext()) {

sb.append(",");

}

}

sb.append("}");

returnsb.toString();

}

publicclass MySetIterator implements Iterator<Integer> {

//implements an iterator for the set

privateintcurrentList;

private Node currentNode;

//helper method that finds the next non empty bucket

privatevoid nextList() {

while (currentList < tableSize && table[currentList] == null) {

currentList++;

}

currentNode = (currentList < tableSize) ? table[currentList] : null;

}

public MySetIterator() {

currentList = 0;

nextList();

}

//returns true if the iteration has more elements.

publicboolean hasNext() {

returncurrentNode != null;

}

//Returns the next element in the iteration.

public Integer next() {

Integer rVal = currentNode.element;

if (currentNode.next != null) {

//what should the currentNode be?

currentNode = currentNode.next;

 

}

else {

//No more elements in the current bucket

//I need to get the next bucket

currentList++;

nextList();

}

returnrVal;

 

}

 

}

public Iterator<Integer> iterator() {

//returns an iterator for the set

returnnew MySetIterator();

}

class Main {

publicstaticvoid main(String[] args) {

MySet mySet = new MySet(10);

 

// Add elements to the set

mySet.addElement(1);

mySet.addElement(2);

mySet.addElement(3);

mySet.addElement(4);

mySet.addElement(5);

 

// Print the set

System.out.println("Set: " + mySet.toString());

 

// Find elements in the set

System.out.println("Find 3: " + mySet.find(3)); // Should return true

System.out.println("Find 6: " + mySet.find(6)); // Should return false

 

// Add more elements to trigger resize

mySet.addElement(6);

mySet.addElement(7);

mySet.addElement(8);

mySet.addElement(9);

mySet.addElement(10);

mySet.addElement(11);

 

// Print the set after resizing

System.out.println("Set after resizing: " + mySet.toString());

}

}

Based on the given code, Please help me to answer the (attached Picture) question.

Consider the lines of code below.

 

a) Draw the hash table after line 9
b)
Describe how your MySetIterator would iterate through the MySet object you drew
in part a. You should describe what each line in the method does and how it is
processing this specific table
c) In what order, would the elements print?
1 MySet test = new MySet (6);
2 test.addElement (1) ;
3 test.addElement
(3);
4 test.addElement
(8) ;
5 test.addElement (7);
test.addElement (2);
7 test.addElement (13);
6
8 test.addElement(0);
9 test.addElement (14);
expand button
Transcribed Image Text:a) Draw the hash table after line 9 b) Describe how your MySetIterator would iterate through the MySet object you drew in part a. You should describe what each line in the method does and how it is processing this specific table c) In what order, would the elements print? 1 MySet test = new MySet (6); 2 test.addElement (1) ; 3 test.addElement (3); 4 test.addElement (8) ; 5 test.addElement (7); test.addElement (2); 7 test.addElement (13); 6 8 test.addElement(0); 9 test.addElement (14);
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