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Java.util.arraylist Cannot Be Cast To Java.util.linkedlist

I'll try to guess the types from your code (adjust them if necessary, you get the idea), let's say you have these declarations somewhere in your program: Map wordIndex = Should I allow my child to make an alternate meal if they do not like anything served at mealtime? How to find duplicate records in a table on databa... What does a -4 above the stave mean? check over here

Cause of java.lang.ClassCastException in Java In order to understand cause of ClassCastException, you need to be familiar with concept of type casting in Java. Better than depending on newInstance in the method. –david van brink Feb 1 '12 at 6:57 add a comment| up vote 0 down vote You could use Class.newInstance to create a more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation share|improve this answer answered Jul 10 '11 at 12:24 AlexR 82.9k368131 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign

more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation How to reply? How to clear all output cells and run all input cells Why are wavelengths shorter than visible light neglected by new telescopes?

If a wondrous item was dynamically created as slimy, can I remove the smell with prestidigitation? Second, since generics were introduced into java programming language casting is still relevant when using legacy, pre-generics APIs. 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 Skyrim: How to stop NPCs from picking up dropped items Find the Emirps!

more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation How to reply? Also write your own classes and method to take advantage of Generics to provide type-safety as shown in this example of How to write parameterized class. If you need a java.util.ArrayList, you can just create a copy: ArrayList list = new ArrayList<>(Arrays.asList(sos1.getValue()); or: List list = new ArrayList<>(Arrays.asList(sos1.getValue()); (if you don't need any members exposed just by

Why getter and setter are better than public field... ► November ( 8 ) ► October ( 13 ) ► September ( 8 ) ► August ( 9 ) ► July What is Constructor in Java with Example - Constru... How to append text into File in Java - FileWriter ... more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

Your else clause is creating a LinkedList, calling a method on it (add) that returns boolean, and putting the resulting autoboxed Boolean into the map. http://stackoverflow.com/questions/21827863/java-util-arraysarraylist-cannot-be-cast-to-java-util-arraylist That's your problem. Bottom line, say List> stuff = new ArrayList>(); String line = "a,b,cdef,g"; String delim = ","; String[] pieces = line.split(delim); stuff.add(Arrays.asList(pieces)); List> stuff = new ArrayList>(); String[] titles = {"ticker", "grade", The primary purpose of this interface is to allow generic algorithms to alter their behavior to provide good performance when applied to either random or sequential access lists.

It happens to have a classname of ArrayList, but that's a nested class within Arrays - a completely different type from java.util.ArrayList. check my blog current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Can Trump undo the UN climate change agreement? while (contentItr.hasNext()) { String word = (String) contentItr.next(); if (wordIndex.containsKey(word)) { LinkedList temp = (LinkedList) w.get(word); //Error occurs here temp.addLast(currentUrl); } else { w.put(word, new LinkedList().add(currentUrl)); } } The first time

However, when I try to retrieve the linked list associated with an existing key, I get the following exception: java.lang.Boolean cannot be cast to java.util.LinkedList. 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 java.lang.ClassNotFoundException: oracle.jdbc.driv... this content What is the point of update independent rendering in a game loop?

It's not an ArrayList. Java Collection classes like HashMap, ArrayList, Vector or Hashtable which is not using Generics. 2. There are other effectively immutable list Collections.emptyList comes to mind, and some are partially mutable -- you can't add to the end of the output of Arrays.asList. –Mike Samuel Jan 29

I thought this exception has been forgotten long back.

asked 2 years ago viewed 5125 times active 2 years ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Visit Chat Linked 0 Code runs but gives me java.util.Arrays$ArrayList cannot T result = returnType.newInstance(); result.add(86); result.add(99); return result; } share|improve this answer edited Jan 28 '12 at 16:21 answered Jan 28 '12 at 16:15 david van brink 2,7741214 add a comment| Someone peeled an American flag sticker off of my truck. Can a president win the electoral college and lose the popular vote How do I make an alien technology feel alien?

To do so, the class has to be "concrete" (as in "not abstract"). share|improve this answer edited Jan 28 '12 at 16:03 answered Jan 28 '12 at 15:55 Mike Samuel 75.4k16142183 I thought of that but List does not offer a clone() How can an advanced (circa 7000 AD) spacefaring human civilization be prevented from entering its own solar system? have a peek at these guys How to prove that authentication system works, and that customer uses the wrong password?

I guess what you want is closer to this (I simplified a bit): public class Questionnaire { private String questionnaireLibelle; private List questions; public List getQuestions() { return questions; } ..... What is Type Casting in Java - Casting one Class ... BlockingQueue in Java - ArrayBlockingQueue vs Link... java.lang.classcastexception java.util.arraylist cannot be cast to java.lang.string I have seen this happening a lot in beginners code based on Java Collection framework, Since ArrayList and String are not related to each

About the kanji 鱈 Wrong way on a bike lane? I used the casting because eclipse told me to do that but then it throws a ClassCastException: java.util.ArrayList$SubList cannot be cast to java.util.ArrayList Any advice? How to fix java.io.NotSerializableException: org.a... share|improve this answer answered Mar 4 '15 at 10:10 TheLostMind♦ 28.1k64179 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign

I highly recommend to use Generics while using any Collection classes or class which acts as container e.g.