Explain the similarities and the differences between an ArrayList and a LinkedList. You must include both similarities and differences to get full credit.
In java collection is a framework which provides an underlining data structure.
ArrayList is a part of collection framework with which we can store dynamic array (growable and resizable array).
Linked List are linear data structures where the elements are not stored in contiguous locations and every element is a separate object with a data part and address part.
Similarities Between ArrayList and LinkedList
Difference between ArrayList and LinkedList in
Java
1. Implementation : ArrayList is the resizable array
implementation of list interface , while LinkedList is the
Doubly-linked list implementation of the list interface.
2. Performance : Performance of ArrayList and LinkedList
depends on the type of operation
a. get(int index) or search operation : ArrayList
get(int index) operation runs in constant time i.e O(1) while
LinkedList get(int index) operation run time is O(n) .
The reason behind ArrayList being faster than LinkedList is that
ArrayList uses index based system for its elements as it internally
uses array data structure , on the other hand ,
LinkedList does not provide index based access for its elements as
it iterates either from the beginning or end (whichever is closer)
to retrieve the node at the specified element index.
b. insert() or add(Object) operation : Insertions in LinkedList are
generally fast as compare to ArrayList.
In LinkedList adding or insertion is O(1) operation . While in
ArrayList, if array is full i.e worst case, there is extra cost of
resizing array and copying elements to the new array , which makes
runtime of add operation in ArrayList O(n) , otherwise it is O(1)
.
c. remove(int) operation : Remove operation in LinkedList is
generally same as ArrayList i.e. O(n).
In LinkedList , there are two overloaded remove methods. one is
remove() without any parameter which removes the head of the list
and runs in constant time O(1) .
The other overloaded remove method in LinkedList is remove(int) or
remove(Object) which removes the Object or int passed as parameter
. This method traverses the LinkedList until it found the Object
and unlink it from the original list . Hence this method run time
is O(n).
While in ArrayList remove(int) method involves copying elements
from old array to new updated array , hence its run time is
O(n).
3. Reverse Iterator : LinkedList can be iterated in
reverse direction using descendingIterator() while there is no
descendingIterator() in ArrayList , so we need to write our own
code to iterate over the ArrayList in reverse direction.
4. Initial Capacity : If the constructor is not
overloaded , then ArrayList creates an empty list of initial
capacity 10 , while LinkedList only constructs the empty list
without any initial capacity.
5. Memory Overhead : Memory overhead in LinkedList is
more as compared to ArrayList as node in LinkedList needs to
maintain the addresses of next and previous node. While in
ArrayList each index only holds the actual object(data).
Explain the similarities and the differences between an ArrayList and a LinkedList. You must include both...
Question 1. [5 points] Explain some of the similarities and some of the differences between using a Laplace transform and using any other method to solve a differential equation. Give a first-order example of each. (Note: You must use full sentences. Only write on this page.)
Explain the similarities and differences between a pyramid of number and a pyramid of biomass. Explain the similarities and differences between the carbon cycle and the phosphorous cycle.
when you have two independent populations, explain the similarities and differences between the test of hypothesis for the difference between the means and the confidence interval estimate for the difference between the means?
Describe the similarities AND differences between mixtures and solutions. Similarities Differences
Explain similarities and differences between the highest unoccupied sublevels in magnesium and calcium ions.
Explain the differences and similarities between 'impedance' in an AC series circuit and 'resistance' in a DC series circuit
differences and similarities between ICN and ANA code of ethics. please give a comprehensive similarities and differences. please do not include years or publishers as a difference.
please explain the similarities and differences between lorentz force and electromotice force in detail.
Explain similarities and differences between the highest unoccupied sublevels in magnesium and calcium ions.
QUESTIONS Q1) Explain the differences and similarities between the welfare implicantions of a tariff and a production subsidy with the help of a diagram. Specify your assumptions.