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Java.lang.integer Cannot Be Cast To Java.lang.string Treemap

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public TreeMap(SortedMap); Constructs a new tree map containing the same mappings and using the same ordering as the specified sorted map. Java Developer Database Admins and Developers System Admins and Developers Architect C-Level Executives Chief Financial Officer (CFO) Chief Information Officer (CIO) Other Roles Analyst Investor Job Seeker Partner PeopleSoft Customer Siebel What is Constructor in Java with Example - Constru... add a comment| 5 Answers 5 active oldest votes up vote 11 down vote accepted How do I get MyVertex types to be casted to Comparables? http://tcsmacs.net/cannot-be/java-lang-integer-cannot-be-cast-to-java-lang-string-solution.php

The key serves to define the location of the value inside the Map data structure (array, linked list, tree, etc. Good programmers write code that humans can understand." --- Martin Fowler Please correct my English. But in the case of a TreeMap, this exception is thrown. January 21, 2013 at 9:18 PM Farooq said... visit

Cannot Be Cast To Java.lang.comparable Treeset

When I convert Long to Integer, I get this error. Problems can become more difficult if all class are closely related. Though we can minimize and avoid java.lang.ClassCastException in Java by using Generics and writing type-safe parameterized classes and method, its good to know real cause of ClassCastException and How to solve posted 6 years ago SortedMap cannot be casted to TreeMap but SortSet can be casted to TreeSet.

If you don't provide a Comparator then TreeSet / TreeMap assumes that the elements implement Comparable (see the Javadoc). That would not require a comparator (so comparator() returns null) but the elements are still not Comparable. Why do languages require parenthesis around expressions when used with "if" and "while"? Cannot Be Cast To Java.lang.comparable Priority Queue When i change Integer in every hashmap, so it works on Long I suppose, then I get this error Code (Text): [00:48:28 ERROR]: Could not pass event AsyncPlayerChatEvent to NonsenseCraft v1.

How to find middle element of LinkedList in Java i... Cannot Be Cast To Java.lang.comparable Treemap extends V> m) { return new TreeMap(m); } // not too sure if this is guaranteed to be safe...Apart from not being able to create a TreeSet without a Comparator, it Offline Panda_Crafter My BukkitDev ProfileMy Plugins (4) How do I fix this error? Developer Tools SQL Developer JDeveloper and ADF Developer Tools for Visual Studio Enterprise Pack for Eclipse NetBeans IDE See All ???

How to fix java.lang.classcastexception cannot be ... Treeset Comparator Share This Page Tweet Your name or email address: Do you already have an account? depending on the implementation of the Map). A carefully designed program will never see ClassCastException.

Cannot Be Cast To Java.lang.comparable Treemap

Browse other questions tagged java treemap or ask your own question. Homepage I'm not sure that it will ever be able to figure itself out, everything else, maybe. Cannot Be Cast To Java.lang.comparable Treeset Since due to polymorphism in Java an Object instance can hold any type of Object but you can only cast between same type. Treemap Comparable Example Ravi Kiran Va Ranch Hand Posts: 2234 I like...

new TreeMap(new Comparator() { public int compare(MyVertex o1, MyVertex o2) { //comparison logic goes here } }); Why is this necessary? get redirected here Java Error : 'javac' is not recognized as an inter... Thanks Rob for the above . It works not in the way I want, it just ignores this number 55523066094 #12 pandacrafter1, Jul 30, 2016 pandacrafter1 JacobCrofts said: ↑ Then use long instead.Click to expand... Java Treemap Comparator Example

In this case, you're setting a String value as your key, but trying to retrieve the data using an Integer, and the exception is pretty clear about it: java.lang.ClassCastException: java.lang.String cannot How to escape String literal in Java using Eclipse... Why do languages require parenthesis around expressions when used with "if" and "while"? navigate to this website extends K,?

share|improve this answer answered Feb 23 '14 at 16:42 Kick 3,73211018 thank you very much , it works :) –user3343751 Feb 23 '14 at 16:58 my pleasure Java Implement Comparable Last edited: 29, 2016 Oxyorum, 29, 2016 #6 Offline Panda_Crafter My BukkitDev ProfileMy Plugins (4) Oxyorum said: ↑ @Panda_Crafter Long.valueOf(x).intValue()Click to expand... MMO-Champion MMO-Champion Keep ahead with the champions of WoW coverage.

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adding more confusion to me Save India From Corruption - Anna Hazare. Good programmers write code that humans can understand." --- Martin Fowler Please correct my English. public class MyVertex implements Comparable { @Override public int compareTo(MyVertex o) { // do the comparison logic } } Other option is to pass a Comparator Object to TreeMap http://docs.oracle.com/javase/1.5.0/docs/api/java/util/TreeMap.html#TreeMap(java.util.Comparator) share|improve Java Comparable new TreeMap(new Comparator() { public int compare(MyVertex o1, MyVertex o2) { } }); share|improve this answer answered Jan 3 '13 at 6:33 Kumar Vivek Mitra 25.2k52554 add a comment| Not

How to find second highest or maximum salary of Em... How to create thread safe Singleton in Java - Java... How do I make an alien technology feel alien? my review here 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

Articles Learning Library Newsletters Events Pre-Built Developer VMs Technology Network Blog Discussion Forums Database and SQL Oracle Fusion Middleware Oracle Enterprise Manager Developer Tools Technology Network Feedback See All ??? How to use?0Cast TreeMap.Submap return: SortedMap, back to TreeMap13Find element position in a Java TreeMap14Java TreeMap Comparator4Java. Useful Searches Recent Posts Resources Resources Quick Links Search Resources Most Active Authors Latest Reviews Wiki Wiki Quick Links Wiki Index Page List Recent Activity Team Team Quick Links Administrator Moderator Hmmm.

To do that it either needs a Comparator or if you don't provide one the element-class must implement the Comparable interface. super E>> create() { return new TreeSet(); } public static TreeSet create(Comparator