Question

Using Java, Complete LinkedListSet:

package Homework3;
public class LinkedListSet <T> extends LinkedListCollection <T> {
LinkedListSet() {
}
public boolean add(T element) {
// Code here
return true;
}
}

Homework3 class:

public class Homework3 {
public static void main(String[] args) {
ArrayCollection ac1 = new ArrayCollection(); // Calling Default
Constructor
ArrayCollection ac2 = new ArrayCollection(2); // Calling overloaded
constructor
ArraySet as1 = new ArraySet();
ac2.add("Apple");
ac2.add("Orange");
ac2.add("Lemon"); // This can't be added into ac2 as collection is full
System.out.println(ac2.remove("Apple")); // This should return true
System.out.println(ac2);
ac2.enlarge(10);
ac2.add("Watermelon");
System.out.println("Equals: " + ac1.equals(ac2));
as1.add("Avocado");
as1.add("Avocado"); // This will not be added, since the
collection is "set"
}
}

Answer 1

import java.util.LinkedHashSet;
public class Demo
{
   public static void main(String[] args)
   {
       LinkedHashSet<String> linkedset =
                       new LinkedHashSet<String>();

       // Adding element to LinkedHashSet
       linkedset.add("A");
       linkedset.add("B");
       linkedset.add("C");
       linkedset.add("D");

       // This will not add new element as A already exists
       linkedset.add("A");
       linkedset.add("E");

       System.out.println("Size of LinkedHashSet = " +
                                   linkedset.size());
       System.out.println("Original LinkedHashSet:" + linkedset);
       System.out.println("Removing D from LinkedHashSet: " +
                           linkedset.remove("D"));
       System.out.println("Trying to Remove Z which is not "+
                           "present: " + linkedset.remove("Z"));
       System.out.println("Checking if A is present=" +
                           linkedset.contains("A"));
       System.out.println("Updated LinkedHashSet: " + linkedset);
   }
}