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Java Cannot Convert From Object To Arraylist

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What do you mean by "Eclipse Helios is telling me I have an error here, but the code does compile file" - do you mean it compiles fine at the command Java compiler/RT is Sun Java 1.5.0.22; host platform is Fedora 13. I've tried forcing Eclipse to rebuild the project to no avail. > I'm confused as to how Eclipse concludes that that method is returning a > Collection of Object given the public List getFileContents() { return fileContents; } The call to "file.getFileContents()" is red and underlined, and a mouseover gives the error "Type mismatch: cannot convert from element type Object to String". http://tcsmacs.net/cannot-convert/java-type-mismatch-cannot-convert-from-object-to-int.php

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France) Re: ArrayList frustration "cannot cast from Object..." Reply #6 - Apr 1st, 2009, 3:18pm Excuse me, cloister, but I think you And to save every single class ever written to handle generic things have to have 8 extra versions of each method for the 8 primitive types, there are Object types of The content on this forum will remain online. FAQs Search RecentTopics FlaggedTopics HotTopics Best Topics Register / Login Win a copy of Cybersecurity Lexicon or Cyber-Physical Attack Recovery Procedures: A Step-by-Step Preparation and Response Guide in the Security forum!

Type Mismatch Cannot Convert From Object To List

Alternating Fibonacci Should you change a thermostat when changing your water pump Is there a word for being sad about knowing that the things that make you happy will eventually go posted 4 years ago 1 Faisal Fuad wrote: Compiler is showing red under myArrayList in the above for loop....and saying "Type mismatch: cannot convert from element type Object to String" You Might be a better idea here, depending on the circumstances, to declare sriList as a List, and cast accordingly. –joev Nov 18 '09 at 15:35 add a comment| Your Answer

So what the constructor does is the following: 1. We have declared// someInts as an ArrayList only to avoid any confusion in relation// to the type of someInts ArrayList someInts =newArrayList();print(someInts);// up-casting will happen automatically }publicstaticvoidprint(List ints) {// print all posted 4 years ago Hi...please help me to find my mistake. Type Mismatch Cannot Convert From Element Type Object To String In addition, the warnings/errors don't appear in the Problems display, only in the source files.

I've tried forcing Eclipse to rebuild the project to no avail. Cannot Convert From Object To String Java Leave a comment on PhiLho's reply Change topic type Topic Type : Discussions Questions No of days : 1 2 3 4 5 6 7 8 9 10 11 12 13 Post Reply Bookmark Topic Watch Topic New Topic Similar Threads Exception in thread "main" java.lang.NullPointerException ArrayList Conversion ArrayList does not print to terminal window after if statement inclusion, help? http://stackoverflow.com/questions/31621983/cant-convert-from-object-to-list-but-it-already-is-a-list Could you please help me with arrayList converting.

you have to typecast it to appropriate type explicitly. And I don't think Processing supports the diamond operator of Java 7: ArrayList things = new ArrayList<>(); For the record, the great Guava library offers a facility (pre-dating the Java 7 And what are your compiler compliance settings (that is, are you compiling for 1.5, 1.6, ...?) Can you reproduce the problem in a small but complete code snippet that you could Can I use that to take out what he owes me?

Cannot Convert From Object To String Java

Having two different kinds of integer, depending on whether they're boxed or not? New discussions are ongoing at the new URL http://forum.processing.org. Type Mismatch Cannot Convert From Object To List Polyglot Anagrams Robbers' Thread Why is (a % 256) different than (a & 0xFF)? Cannot Convert From String To Object Element[] array = {new Element(1), new Element(2)}; List list = new ArrayList(array.length); Collections.addAll(list, array); 4.

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France) Re: ArrayList frustration "cannot cast from Object..." Reply #2 - Mar 31st, 2009, 2:57am Smart, NoahBuddy!Explanation: Processing uses Java 1.5/1.6, so my review here What is the most efficient & fastest way to speed up the installation of packages with thousands of items? Report message to a moderator Re: type mismatch: cannot convert from element type object [message #636201 is a reply to message #632473] Fri, 29 October 2010 15:44 Roland Maybe it won't work if there's autoboxing involved. Type Mismatch: Cannot Convert From Arraylist<> To List<>

But it's annoying when trying to eliminate all those errors and warnings that this displays as if its an error. In the example shown below, the print method expects an object of type List, but we give it an ArrayList object when we invoke it from the main method. Polyglot Anagrams Robbers' Thread Why were pre-election polls and forecast models so wrong about Donald Trump? http://tcsmacs.net/cannot-convert/java-type-mismatch-cannot-convert-from-object-to-string.php What crime would be illegal to uncover in medieval Europe?

Any clues on what > settings I need to get Eclipse to see this correctly? > > TIA, > > roland Exactly what is the error you are getting? If you see something else that needs to be fixed, please point it out. Copy the array to ArrayList's own back array called "elementData" Here is the source code of Contructor of ArrayList.

Version: Indigo Release Build id: 20110615-0604 Is there any setting/config/whatever I can tweak to make this erroneous error go away? --- Mike Norman Report message to a moderator

Hibernate/JPA's Query.setParameter(), for example, can't handle that List type. All Rights Reserved. Page generated in 0.02474 seconds .:: Contact :: Home ::. I am (still!) using WinXP(SP3) so the 32-bit version is still broken.

The compiler disciplined my little adventure, with this error message:Type mismatch: cannot convert from ArrayList to ArrayListSo what went wrong ? Do the Leaves of Lórien brooches have any special significance or attributes? Why are they considered to be different types? navigate to this website It is developed by a small team of volunteers. Info \ Site hosted by Media Temple!

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Could you please zip up your workspace and attach it to a bug report against JDT/Core? How can I get my ArrayList back from the session object. Not the answer you're looking for? class array ?

From what I have tested, this solution offers a better performance: Element[] array = {new Element(1), new Element(2)}; List list = new ArrayList(array.length); Collections.addAll(list, array); Kumarbaki How to convert list array more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed I guess that is why this question is so popular. Wrong way on a bike lane?

Find the Emirps! import java.util.List; import java.util.ArrayList; public class User { private List subscribed; public User() { this.subscribed = new ArrayList(); } public List getSubscribed() { return ((ArrayList)subscribed).clone(); } } java list object arraylist