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Integer Cannot Be Cast To Comparable

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Janeice DelVecchio Saloon Keeper Posts: 1809 12 I like... share|improve this answer edited Jan 21 '10 at 21:10 answered Jan 21 '10 at 20:32 Paul Wagland 14.1k73759 add a comment| up vote 0 down vote I haven't put too much The range to be sorted extends from index fromIndex, inclusive, to index toIndex, exclusive. (If fromIndex==toIndex, the range to be sorted is empty.) All elements in this range must implement the Are “la malplej juna” and “la plej maljuna” entirely interchangeable? check over here

What is the most someone can lose the popular vote by but still win the electoral college? Unlike C-style languages, arrays are objects in Java. You have method compareTo(); so just add implements Comparable to your class MyVertex . public class IntDriver { public static void main(String[] args) { Scanner keyboard = new Scanner(System.in); //Creating variables int data; boolean check = false; int choice; int size = 5; int increment http://stackoverflow.com/questions/2112343/java-integer-obj-cant-cast-to-comparable

Cannot Be Cast To Java.lang.comparable Treeset

Today's Topics Dream.In.Code > Programming Help > Java cannot be cast to java.lang.Comparable Page 1 of 1 New Topic/Question Reply 9 Replies - 8156 Views - Last Post: 20 February 2013 Photographing Sea Turtles hatching on the beach How do I make an alien technology feel alien? You can also prevent ClassCastException in Java by using Generics.

You can cast any non-primitive array to Object[]. That's why the toArray method in Collection requires you to pass an array - it reads the actual type of the array using reflection, and if needed, creates another array to Washington DC odd tour request issue Where to take phone interview while at work What is role of palladium in hydrogenation reactions? Java.lang.classcastexception Ljava.lang.object Cannot Be Cast To Naturally, this code doesn't make sense; you would be putting a Long into your heap of Elements, and that's just not right.

Maybe sharing your full code will help. Ljava Lang Object Cannot Be Cast To Ljava Lang Comparable How to comment uncomment single line and block of ... Here's my best try so far: public class MyArrayList extends MyListADT { // lots of stuff public static > T smaller(T x, T y) { if(x.compareTo(y) http://stackoverflow.com/questions/27591061/ljava-lang-object-cannot-be-cast-to-ljava-lang-integer By using Generics in Collection classes and other places you can safely minimize java.lang.ClassCastException in Java.

java share|improve this question edited Jan 2 '12 at 9:29 Jens Schauder 32.9k1383183 asked Jan 2 '12 at 9:27 who must not be named 108119 Post the source for Create Generic Array Java 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 posted 6 years ago Istvan Kovacs wrote:The problem is that you create an Object[], which cannot be cast to T[]. element is an array .

Ljava Lang Object Cannot Be Cast To Ljava Lang Comparable

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 http://stackoverflow.com/questions/25835983/java-lang-object-cannot-be-cast-to-java-lang-comparable Change the array creating into "new Comparable[maxSize]", possibly "new Comparable[maxSize]" if your IDE gives a raw-type warning, and your code will work. Cannot Be Cast To Java.lang.comparable Treeset SCJP 1.4 - SCJP 6 - SCWCD 5 - OCEEJBD 6 - OCEJPAD 6 How To Ask Questions How To Answer Questions Istvan Kovacs Ranch Hand Posts: 100 posted 6 Object Cannot Be Cast To Comparable Zener diodes in glass axial package - not inherently shielded from photoelectric effect?

Java Collection classes like HashMap, ArrayList, Vector or Hashtable which is not using Generics. 2. check my blog I can NOT compile first class below CODE: Dynamic Sorting on Multiple Indexes All times are in JavaRanch time: GMT-6 in summer, GMT-7 in winter Contact Us | advertise | mobile share|improve this answer answered Jan 3 '13 at 5:38 assylias 178k26340491 last note is interesting –Subin Jan 3 '13 at 5:46 add a comment| up vote 5 down vote Problems can become more difficult if all class are closely related. Implement Comparable

Hi genius , how to resolve this ,Causedby:java.lang.ClassCastException:java.lang.Integercannotbecasttojava.util.Collection April 15, 2015 at 10:58 PM Anonymous said... Find the Emirps! Thus, at run time we have: public abstract class MyListADT implements Cloneable { protected int length; protected int maxSize; protected Comparable[] list; public MyListADT(int size) { maxSize = size; length = this content Type erasure also turns every occurrence of T into Comparable so why not use Comparable[]?

xparse processor with multiple arguments How to delete the lines from a file that do not contain dot? Treeset Comparator That doesn't correct the problem. –Avneesh Dec 21 '14 at 20:49 add a comment| up vote 0 down vote Here is how you would fix it, you should not ever do Boss sends a birthday message.

However, I was trying to cast the reference to a comparable/object array to some a subclass.

So the cast is, theoretically, incorrect. The declaration should be public class MyArrayList

Actually you can (it's a warning after all, not an error), but only if the rest of the code ensures that every interaction with the array respects the T type. there might be something that will do this for you. What now? have a peek at these guys How to add, subtract days, months, years, hours fr...

Why is Professor Lewin correct regarding dimensional analysis, and I'm not? Insert\n2. When you do things right, people won't be sure you've done anything at all. 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

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 read input from command line in Java using ... Can I use that to take out what he owes me? Not the answer you're looking for?