Can you please Modify the DomainBlocker program using (1) HashSet and (2) LinkedHashSet. Measure the efficiency of three different programs using TreeSet, HashSet, and LinedHashSet. Which implementation is most efficient?

//DomainBlocker.java

import java.io.File; import java.io.FileNotFoundException; import java.util.Scanner; import java.util.TreeSet;

/** * A URL domain blocker. * * @author Java Foundations * @version 4.0 */ public class DomainBlocker { private TreeSet blockedSet;

/** * Sets up the domain blocker by reading in the blocked domain names from * a file and storing them in a TreeSet. * @throws FileNotFoundException */ public DomainBlocker() throws FileNotFoundException { blockedSet = new TreeSet();

File inputFile = new File("blockedDomains.txt"); Scanner scan = new Scanner(inputFile);

while (scan.hasNextLine()) { blockedSet.add(scan.nextLine()); } }

/** * Checks to see if the specified domain has been blocked. * * @param domain the domain to be checked * @return true if the domain is blocked and false otherwise */ public boolean domainIsBlocked(String domain) { return blockedSet.contains(domain); } }

//DomainChecker.java

import java.io.FileNotFoundException; import java.util.Scanner;

/** * Domain checking driver. * * @author Java Foundations * @version 4.0 */ public class DomainChecker { /** * Repeatedly reads a domain interactively from the user and checks to * see if that domain has been blocked. */ public static void main(String[] args) throws FileNotFoundException { DomainBlocker blocker = new DomainBlocker(); Scanner scan = new Scanner(System.in);

String domain;

do { System.out.print("Enter a domain (DONE to quit): "); domain = scan.nextLine();

if (!domain.equalsIgnoreCase("DONE")) { if (blocker.domainIsBlocked(domain)) System.out.println("That domain is blocked."); else System.out.println("That domain is fine."); } } while (!domain.equalsIgnoreCase("DONE")); } }