Question

The question exercises the union, intersection, and the intersection operations of two set of strings (names). For this type of problem, you need to preserve the original sets from being modified by some of the set method. You can used the clone( ) method to copy the sets or simply create another set using the same array contents as the original. You can find an example of the clone() for the LinkedHashSet set in   the provided “skeleton” program (assign8_Q3.java) code to start.

your code should display the following;

set1 = [Greg, Joyce, Janette, Bob, Kevin, Michael]

set2 = [George, Katie, Kevin, Maddie, Ryan]

before AddAll set2[Greg, Joyce, Janette, Bob, Kevin, Michael]

after AddAll set2[Greg, Joyce, Janette, Bob, Kevin, Michael, George, Katie, Maddie, Ryan]

The union of the two sets is [Greg, Joyce, Janette, Bob, Kevin, Michael, George, Katie, Maddie, Ryan]

The difference of the two sets is [Greg, Joyce, Janette, Bob, Michael]

The intersection of the two sets is [Kevin]

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Assign8_Q3.java file:

package Com.Exercise;

import java.util.*;

public class Assign8_Q3 {
public static void main(String[] args) {
     
   String SArray1[] = {"Greg", "Joyce", "Janette", "Bob", "Kevin", "Michael"};
   String SArray2[] = {"George", "Katie", "Kevin", "Maddie", "Ryan"};
  
  
   LinkedHashSet<String> set1 = convertArrayToSet(SArray1);
   LinkedHashSet<String> set2 = convertArrayToSet(SArray2);
  
   // you can use the following to create a copy of set1 or simple create another "set1 "
// LinkedHashSet<String> set1Clone1 = (LinkedHashSet<String>)set1.clone();
//   
  
// write your codes below

Answer 1

If you have any doubts, please give me comment...

import java.util.*;

public class Assign8_Q3 {

public static void main(String[] args) {

String SArray1[] = { "Greg", "Joyce", "Janette", "Bob", "Kevin", "Michael" };

String SArray2[] = { "George", "Katie", "Kevin", "Maddie", "Ryan" };

LinkedHashSet<String> set1 = convertArrayToSet(SArray1);

LinkedHashSet<String> set2 = convertArrayToSet(SArray2);

// you can use the following to create a copy of set1 or simple create another

// "set1 "

// LinkedHashSet<String> set1Clone1 = (LinkedHashSet<String>)set1.clone();

//

// write your codes below

System.out.println("set1 = "+set1.toString());

System.out.println("set2 = "+set2.toString());

LinkedHashSet<String> set = (LinkedHashSet<String>)set1.clone();

System.out.println("Before AddAll set2"+set.toString());

set.addAll(set2);

System.out.println("After AddAll set2"+set.toString());

LinkedHashSet<String> unionSet = new LinkedHashSet<String>();

for(String s: set1)

unionSet.add(s);

for(String s: set2)

unionSet.add(s);

LinkedHashSet<String> differenceSet = new LinkedHashSet<String>();

for(String s: set1){

if(!set2.contains(s))

differenceSet.add(s);

}

LinkedHashSet<String> intersectionSet = new LinkedHashSet<String>();

for(String s: set1){

if(set2.contains(s))

intersectionSet.add(s);

}

System.out.println("The union of the two sets is "+unionSet);

System.out.println("The difference of the two sets is "+differenceSet);

System.out.println("The intersection of the two sets is "+intersectionSet);

}

public static LinkedHashSet<String> convertArrayToSet(String[] SArray){

LinkedHashSet<String> set = new LinkedHashSet<String>();

for(String s: SArray){

set.add(s);

}

return set;

}

}