tag:blogger.com,1999:blog-8712770457197348465.post936584202825509322..comments2024-03-29T05:54:46.190-07:00Comments on Javarevisited: Difference between LinkedList and ArrayList in Javajavin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.comBlogger21125tag:blogger.com,1999:blog-8712770457197348465.post-27827028497457376712018-11-23T01:31:00.042-08:002018-11-23T01:31:00.042-08:00Again there would be trade off, for linkedList the...Again there would be trade off, for linkedList the addition of any new element, how it could be O(1) complexity, it would be O(n), as for every element to be added, you have to traverse the list and added to the end of the list, again for the arraylist if the size of the list is not excceding the available size of the list, it would be o(1) of complexity , and if size exceeds the limit, it would Anonymoushttps://www.blogger.com/profile/06854528589714662405noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-26190223172468651632018-09-26T19:04:24.209-07:002018-09-26T19:04:24.209-07:00Hello Yngvar that comes from List interface but fo...Hello Yngvar that comes from List interface but for linked list they won't provide O(1) time, instead O(n).javin paulhttps://www.blogger.com/profile/15028902221295732276noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-73161252503577657412018-09-26T06:00:22.459-07:002018-09-26T06:00:22.459-07:00LinkedList already provides random or index based ...LinkedList already provides random or index based access / public E get(int index)Anonymoushttps://www.blogger.com/profile/05605168665917699597noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-3707302088900916212014-12-17T07:49:09.883-08:002014-12-17T07:49:09.883-08:00LinkedList can be used as queue,deque and stack an...LinkedList can be used as queue,deque and stack and even index-access collection.<br />LinkedList is truly function-rich.<br />LinkedList is best suited when you need sequential access to it like adding,removing elements one after another. However indexed access might be not very efficient.<br />Read my tutorial to know more about internal life of LinkedList hereAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-14198385307390737952013-12-23T22:24:58.013-08:002013-12-23T22:24:58.013-08:00QUOTE:"time to traverse 1st element 0
time to...QUOTE:"time to traverse 1st element 0<br />time to traverse 999999th element 0"<br /><br />The reason of the test result shown above is that the retrieval operation of get(i) method either begin from the beginning or the end of the list. And it depends on which index is closed to index i.So get(1) starts retrieving from the beginning of the list, get(999999) starts from the end Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-14499690446221736722013-08-07T21:19:32.559-07:002013-08-07T21:19:32.559-07:00@Anonymous, Yes, we can remove elements by index i...@Anonymous, Yes, we can remove elements by index in ArrayList, but that also shifts subsequent elements to the left by subtracting one from there index, This is costly operation, because it involves calls to System.arraycopy() for copying elements. If you look code for remove(int index) from java.lang.ArrayList, this is clear:<br /><br />int numMoved = size - index - 1;<br />if (numMoved > 0)<Javin @ ArrayList vs LinkedListhttp://java67.blogspot.com/2012/12/difference-between-arraylist-vs-LinkedList-java.htmlnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-15150105024146483322013-08-07T02:21:27.752-07:002013-08-07T02:21:27.752-07:00In arraylist too we can remove the elements using ...In arraylist too we can remove the elements using the index value: http://docs.oracle.com/javase/6/docs/api/java/util/ArrayList.html#remove(int)<br /><br />But your following statement is contradictory in the first point:<br /><br />"but remove is costly in ArrayList as you need to rearrange all elements"Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-62051779451568215652013-04-19T05:08:32.740-07:002013-04-19T05:08:32.740-07:00I'm using LinkedList only when I need Queue in...I'm using LinkedList only when I need Queue interface features, in all other situations I prefer ArrayList. Nice comparision, good job.Mariooshhttp://5dots.plnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-72365673316679048362013-04-15T19:48:51.641-07:002013-04-15T19:48:51.641-07:00Another key difference between ArrayList vs Linked...Another key difference between ArrayList vs LinkedList in Java is that LinkedList implements Queue interface, which means it can be used as FIFO data structures. LinkedList implements method defined in Queue interface e.g. poll(), peek() and offer() which can be used to retrieve and remove head element from list. ArrayList doesn't implement Queue interface. Since LinkedList provides O(1) Jaynoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-17131407002056695512013-04-13T21:15:00.393-07:002013-04-13T21:15:00.393-07:00Hi Javin..gr8 article few things that I want to ad...Hi Javin..gr8 article few things that I want to add is ...<br />LinkedList and ArrayList are two different implementations of the List interface. LinkedList implements it with a doubly-linked list. ArrayList implements it with a dynamically resizing array.<br /><br />As with standard linked list and array operations, the various methods will have different algorithmic runtimes.<br /><br />For SARAL SAXENAhttps://www.blogger.com/profile/01084233786047386880noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-30664814816949623352013-01-24T00:43:12.951-08:002013-01-24T00:43:12.951-08:00Good and clear explanation. Fortunately for me, mo...Good and clear explanation. Fortunately for me, most of my problems have been of the "array-type" while I was not really aware of linked lists. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-47046670985864505252013-01-07T12:51:19.643-08:002013-01-07T12:51:19.643-08:00Linked list also keeps the order after a remove(in...Linked list also keeps the order after a remove(index) <br />Calebhttps://www.blogger.com/profile/04680556609464423871noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-70133107692558550152012-11-28T12:09:45.832-08:002012-11-28T12:09:45.832-08:00Guys, before you try to do test like those up here...Guys, before you try to do test like those up here, please keep in mind things like warming up testing environment. You have to pass code optimization by making few(lots) of creating, retriving etc operation as some optimization will be done during compilation some during application running.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-37095187978024797002012-09-25T00:52:33.137-07:002012-09-25T00:52:33.137-07:00Does ArraList vs LinkedList is similar to Array vs...Does ArraList vs LinkedList is similar to Array vs LinkedList in terms of data structure ?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-137232916465889032012-09-18T20:32:33.167-07:002012-09-18T20:32:33.167-07:00I understand that the right way to traverse a Link...I understand that the right way to traverse a LinkedList is through ListIterator and it scans it sequentially. But Java API does provide an API for random access using get(int index). And in facts its performance is same as of LinkedList (as show from code below). Does it mean Java provides an efficient wrapper API for LinkedList that works like ArrayList?<br /><br /> public static void main(Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-13771671253993123142012-07-16T01:54:33.809-07:002012-07-16T01:54:33.809-07:00@Dirk, You can see that LinkedList give better pe...@Dirk, You can see that LinkedList give better performance than ArrayList while inserting object into either beginning or end , because LinkedList is implemented at DoublyLinked list using Deque interface. Also for random index requires traversal of list either from beginning or end, whichever is closer to the position. That's why insertion on middle is such an expensive operation in Terrynoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-92195388688422128512012-06-29T02:30:50.869-07:002012-06-29T02:30:50.869-07:00Hi all - currently thinking of whether to choose A...Hi all - currently thinking of whether to choose ArrayList or LinkedList.<br />So as i understood from all the comments i found, LinkedList is faster, when inserting at random places, but slower when reading from random index.<br />But please take a look at the following test:<br /><br />public class Test {<br /><br /> private static final int NUMBER = 100000;<br /><br /><br /> /**<br /> * @Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-1496770923631514082012-04-28T12:57:42.053-07:002012-04-28T12:57:42.053-07:00Would someone explain why I'm getting better r...Would someone explain why I'm getting better results with inserting to ArrayList list than to LinkedList? Is that some compiler optimization? Using Java 1.6.0 u27.<br /><br />Here's the code I used:<br /><br />public class ListsTest {<br /><br /> public static void main(String args[]) {<br /> int count = 10000000;<br /> List arrayList = new ArrayList();<br /> long time = addElements(Daniel Siwiechttps://www.blogger.com/profile/17674317783689750586noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-12901463339571896552012-04-24T03:41:56.951-07:002012-04-24T03:41:56.951-07:00You may want to have a look at http://java.dzone.c...You may want to have a look at http://java.dzone.com/articles/gaplist-%E2%80%93-lightning-fast-list which introduces GapList which strives for combining the strengths of both ArrayList and LinkedList.Thomas Mauchhttps://www.blogger.com/profile/14789321031408829573noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-38015831323530094652012-04-16T01:15:35.379-07:002012-04-16T01:15:35.379-07:00LinkedList vs ArrayList, ArrayList vs LinkedList, ...LinkedList vs ArrayList, ArrayList vs LinkedList, ArrayList and LinkedList in Java, LinkedList and ArrayList in Java, Differnece between ArrayList and LinkedList, Difference between LinkedList and ArrayList, What is difference between LinkedList and ArrayList, When to use LinkedList and When to use ArrayList, LinkedList and Array in JavaAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-83547107591120803552012-02-29T19:37:23.091-08:002012-02-29T19:37:23.091-08:00Another difference between LinkedList and ArrayLis...Another difference between LinkedList and ArrayList is that ArrayList is index based while LinkedList is not. I prefer to use ArrayList or Vector but never used LinkedList.Anonymousnoreply@blogger.com