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Java.lang.classcastexception: Java.util.arraylist Cannot Be Cast To Object

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Post Reply Bookmark Topic Watch Topic New Topic programming forums Java Java JSRs Mobile Certification Databases Caching Books Engineering Languages Frameworks Products This Site Careers Other all forums Forum: Java in Generics are designed to write type-safe code and provides compile time checks which tends to violate type-safety. MyComboBox should accept both Map and Map as parameters Why? How do pilots identify the taxi path to the runway? http://pgexch.com/cannot-be/java-util-arraylist-cannot-be-cast-to-object.html

For example:

 String foo = "bar"; 
infoj With Java 8 stream there is one other way - If I have an Array of cities Say cityArray, it can be Seems reasonable. Join them; it only takes a minute: Sign up java.lang.ClassCastException: java.util.ArrayList cannot be cast to antlr.collections.List up vote 0 down vote favorite if i am not do type casting to query.list(); The question is "how to convert the following array to an ArrayList?".

Java.lang.classcastexception: Java.util.arraylist Cannot Be Cast To Object

ClassCastException is result of bad design and bad coding. java.lang.ClassNotFoundException: oracle.jdbc.driv... I don't expect any other way. extends CharSequence> without any other modification required.

posted 5 years ago albert kao wrote:It is harder than it looks - because of type erasure of the generic type, the two methods are considered the same What generic type? posted 5 years ago Or just work with Map. Here are couple of more examples, which is self explanatory. How To Solve Classcastexception In Java posted 5 years ago 1 Your assumption in wrong.

Difference between Primary key vs Foreign key in t... Java.util.arraylist Cannot Be Cast To Class My cat sat on my laptop, now the right side of my keyboard types the wrong characters Boss sends a birthday message. You don't say what you are doing with this MyString thing; if you're only using its toString() method then using it as an Object would be fine. http://stackoverflow.com/questions/30181339/java-lang-classcastexception-java-util-arraylist-cannot-be-cast-to-java-util-ma Now I create MyComboBox2 so that both map1 & map2 are supported: Map map1 = getdata("data1"); MyComboBox2 box1 = new MyComboBox2(map1); // this is ok Map map2 = getdata("data2");

If so, MyComboBox could possibly take a Mapcollection c to an array 2. This was frequent problem with Java Collection classes like LinkedList and HashSet in Java which holds Object type but with introduction of Generics in Java 5 solved this problem by checking I thought this exception has been forgotten long back.

Java.util.arraylist Cannot Be Cast To Class

ryanlr http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b14/java/util/ArrayList.java#ArrayList.add%28java.lang.Object%29 Matt Passell Came here from the DZone posting. Element[] array = {new Element(1),new Element(2),new Element(3)}; 1. Java.lang.classcastexception: Java.util.arraylist Cannot Be Cast To Object Polyglot Anagrams Robbers' Thread Zener diodes in glass axial package - not inherently shielded from photoelectric effect? Java.lang.classcastexception Java.util.arraylist Cannot Be Cast To Class 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

How to Split String in SQL Server and Sybase How to get current date, month, year and day of we... http://pgexch.com/cannot-be/java-lang-classcastexception-ljava-lang-object-cannot-be-cast-to.html Please use generics as object. Your problem is that you have said that toPass can only accept Integers and then you are trying to add an ArrayList to it. –Romski Aug 12 '14 at 23:36 and my problem remains as it is. –Neha Aug 13 '14 at 10:09 add a comment| up vote 0 down vote your program having typecasting issue on below lines. Java.util.arraylist Cannot Be Cast To Java.lang.integer Hibernate

BlockingQueue in Java - ArrayBlockingQueue vs Link... There isn't any such thing in your code. Share a link to this question via email, Google+, Twitter, or Facebook. http://pgexch.com/cannot-be/java-lang-classcastexception-java-lang-string-cannot-be-cast-to-object.html So, you can't cast it to java.util.ArrayList.

Mapping network drive in Windows XP and 7 - net us... Java.util.arraylist Cannot Be Cast To Java.lang.string In Idt Ubuntu 16.04 installer cant see SSD drive How much time would it take for a planet scale Miller-Urey experiment to generate intelligent life Why is Professor Lewin correct regarding dimensional analysis, Does the requirement really say it has to be an ArrayList? (Bad form if so -- coding to interfaces is much more versatile.) Since the requirement said the method should return

Why do languages require parenthesis around expressions when used with "if" and "while"?

Why are wavelengths shorter than visible light neglected by new telescopes? XPath Tutorial - How to select elements in XPATH b... Reload to refresh your session. Classcastexception In Java Example but this did not work. –Neha Aug 12 '14 at 8:31 Please put complete code as what you are trying to achieve as sample program and I may try

Not the answer you're looking for? I could run the code successfully, now, how can I do the opposite: String[] array = (String[]) list.toArray(); Is also throwing me a ClassCastException: [Ljava.lang.Object; cannot be cast to [Ljava.lang.String; You can also prevent ClassCastException in Java by using Generics. this content How to fix java.io.NotSerializableException: org.a...

How to Create and Evaluate XPath Expression in Jav... How to compare Arrays in Java - Equals vs deepEqua... asked 9 months ago viewed 779 times active 9 months ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Get the weekly newsletter! How to append text into File in Java - FileWriter ...

I encountered an exception in the line toPass.add((Integer)paretoSet.get(i)); as java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.lang.Integer How should I fix this problem? Can I use that to take out what he owes me? Comment 4 Alexey Butenko 2009-08-10 07:29:25 UTC Not able to reproduce. How to Count Occurrences of a Character in String ...

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 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! What is Object in Java Programming and OOPS - Exam... can you give any example for this.?

posted 5 years ago I was doing some of the workshop content on blackbeltfactory.com site, the "List and Arrays" one. Adding another constructor with Map as the parameter will result in compile error which I had posted. This leads to ClassCastException if object is not of type on which you are casting it. Join them; it only takes a minute: Sign up How to fix: java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.lang.Integer up vote 1 down vote favorite I encountered a problem when I

posted 5 years ago Then based on what I've seen there, your best choice is to convert your Map objects to Map objects. Many of advanced Java IDE like Eclipse and Netbeans will give you hyperlink to navigate till culprit line number in Java file.