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Find Same Values Between 2 ArrayList And Return As Another ArrayList

stackoverflow.com - 2012-03-28 03:58:58 - Similar - Report/Block

I am trying to extract the values shared by two arraylist into another arraylist. using System.Linq; private ArrayList GetSameOf2AL(ArrayList first, ArrayList second) { ArrayList same = new ArrayList(); var one = from int i in first select i; var two = from int i in second select i;...

ClassCastException: ArrayList cannot be cast to String

stackoverflow.com - 2012-06-11 00:30:12 - Similar - Report/Block

I get this error: java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.lang.String This is the code: public static List<String>produit_cart(ArrayList l) List<String>re=new ArrayList(); List<String>l4=new ArrayList(); re=(List<String>) l.get(0); for(int i=1;i<l.size();i++) { l4=new Arra...

Why use "List list = new ArrayList" instead of "ArrayList list = new ArrayList" [closed]

stackoverflow.com - 2012-03-24 16:18:01 - Similar - Report/Block

Possible Duplicate: Why should the interface for a Java class be prefered? When should I use List<Object> list = new ArrayList<Object>; ArrayList inherits from , so if some features in ArrayList aren't in , then I will have lost some of the features of ArrayList , right? And the compiler will notice an error when trying to a...

Remove Duplicates from Two Dimensional ArrayList

stackoverflow.com - 2012-03-28 20:30:29 - Similar - Report/Block

I have a two dimensional ArrayList that I need to filter the duplicates out of. current result of generateRows: [[one], [two], [three], [one]] Java Pseudo Code: ArrayList<ArrayList<String>> rows = new ArrayList<ArrayList<String>> (); rows = generateRows(); //method not shown, but returns a ArrayList<ArrayList<...

How to efficiently store past depth pixel data from depthMapRealWorld() method?

stackoverflow.com - 2012-03-25 22:28:01 - Similar - Report/Block

I can't get around a peculiar problem with SimpleOpenNI for Processing ao I'm asking for your help. I'd like to store snapshots of pixel depth data (returned by .depthMapRealWorld() method as PVector arrays) on discrete time intervals, then process them further for a presentation. I tried adding them in an ArrayList, but it seems that the...

Method to calculate average from ArrayList and ArrayList

stackoverflow.com - 2013-04-09 13:37:26 - Similar - Report/Block

I have a Java method which takes an ArrayList as a parameter. It calculates the average of the ArrayList, and returns the value. Now I want to pass an ArrayList Java will not allow this, it would be possible in C++. So, just wondering what alternatives there are available, other than creating an identical class which differs only by the t...

Cannot use ArrayList of type char as method's argument

stackoverflow.com - 2012-05-07 15:40:46 - Similar - Report/Block

Cannot define ArrayList<char> as argument of validate . Why it cannot be done? When trying ArrayList<?> it works. Why? Should ArrayList<?> be used instead of ArrayList<char> ? What is the difference? public boolean validate(ArrayList<char> args){ ... } Error: Syntax error on token "char", Dimensions expect...

Trying to pass an arraylist to a varargs method

stackoverflow.com - 2012-03-25 22:26:25 - Similar - Report/Block

Basically I have an ArrayList of locations: ArrayList<WorldLocation> locations = new ArrayList<WorldLocation>(); below this I call the following method: .getMap(); the parameters in the getMap() method are: getMap(WorldLocation...locations) The problem I'm having is I'm not sure how to pass in the WHOLE list of locations int...

Merging two arrayLists into a new arrayList, with no duplicates and in order, in Java

stackoverflow.com - 2012-03-29 02:56:39 - Similar - Report/Block

I am trying to "combine" two arrayLists, producing a new arrayList that contains all the numbers in the two combined arrayLists, but without any duplicate elements and they should be in order. I came up with this code below. I run through it and it makes sense to me, but Im not sure if I can be using < or > to compare get(i)'s in arra...

I can't pass a String array to my AsyncTask

stackoverflow.com - 2012-06-09 17:15:59 - Similar - Report/Block

The compiler error is " The method execute(ArrayList<String>...) in the type AsyncTask<ArrayList<String>,Voi d,ArrayList<String>> is not applicable for the arguments (String) Why wouldn't it accept the new parameter? can anyone see what i am doing wrong? ArrayList passing = new ArrayList(); passing.add(logicalUrl);...

How to create ArrayList (ArrayList ) from array (T[]) in Java

stackoverflow.com - 2008-10-01 16:38:32 - Similar - Report/Block

I have an array that is initialised like: Element[] array = {new Element(1),new Element(2),new Element(3)}; I would like to convert this array into an object of the ArrayList class. ArrayList<Element> arraylist = ???; I am sure I have done this before, but the solution is sitting just at the edge of my memory.

altering arraylist

java-forums.org - 2013-05-08 23:43:35 - Similar - Report/Block

Hi. So I learned that when using a for each loop through an array list...I cant just straight up alter it. I have to create a new arraylist and alter that is this true? For example: I cannot do this: correct? Code: for (Fish f: fish){ //removing element f from arraylist called fish if(f.isAlive() == false){ fish.remove(f);l); instead I...

evolveStar Join

ArrayList as key in Hashmap

stackoverflow.com - 2012-04-02 11:07:41 - Similar - Report/Block

Would it be possible to add arraylist as key in hashmap. I would like to keep the frequency count of bigram. Key as bigram and value as its frequency. For each of the bigram like "he is",I am creating of arraylist of it and inserting it in hashmap. But i am not getting the correct output. public HashMap<ArrayList<String>, Integer...

How to initialize an Array of ArrayList in java?

stackoverflow.com - 2012-04-19 13:38:24 - Similar - Report/Block

How can I initialize an Array ArrayList<String> I tried this syntax but it didn't work: ArrayList<String>[] subsection = new ArrayList<String>[4];...

Adjacency Matrix with an ArrayList of ArrayLists

java-forums.org - 2013-04-09 04:46:13 - Similar - Report/Block

Hi guys, I am very new to Java and programming in general so please excuse any noob things I do/ask :P: I am trying to create an Adjacency Matrix for a graph and decided to use an ArrayList of ArrayLists (is there a better way to represent a 2D array?) Code: private ArrayList> adjacencyMatrix; I've also got another ArrayList called listOf...

Does a 2D Arraylist exist?

java-forums.org - 2013-02-23 22:25:17 - Similar - Report/Block

I have created 2 regular 1-D Arrays but I want to stick them all into 1 ArrayList. Is this even possible. I want to tidy up the whole thing if possible. I am new to Java and this is for a homework assignment. My three arrays are all Integer Arrays so the ArrayList of Arrays would be of Integers if that makes any sense to anyone. Any help...

Improving efficiency of Sieve of Eratosthenes code in java

stackoverflow.com - 2012-02-22 19:23:57 - Similar - Report/Block

I've worked upon a code for Sieve of Eratosthenes in Java, but I face a few time and space efficiency issues. Here's the code : import java.util.*; class EratosthenesSeive public static void main(String args[]) { ArrayList<Long> myPrimeList = new ArrayList<Long>(); ArrayList<Long> myTempPrimeList...

Passing ArrayList elements to an Object[] array to use them in a menu?

java-forums.org - 2013-04-21 19:25:52 - Similar - Report/Block

I want to write a program that will read in dates from a file and then store them in an ArrayList of string type. I want to then take them out of the arraylist and put them in an Object[] menu to use them in a JOptionPane menu. Is this possible at all?? Can someone give me a sample or some tips? Thanks Guys!...

How to Use ArrayList in more than one Activity?

stackoverflow.com - 2012-01-28 09:05:14 - Similar - Report/Block

How i can access ArrayList from one Activity to another and also clear ArrayList value? Thanks in advance...

Another java.lang.IndexOutOfBoundsException, but index < size

stackoverflow.com - 2012-05-06 23:51:29 - Similar - Report/Block

I've just ported all my arrays to ArrayList (due to my great lack of knowledge in Java I didn't know basic Array type does not have any ".add" option) in my little program and everything seems fine... except that from time to time an exception is thrown, but it contradicts itself: Exception in thread "AWT-EventQueue-0" java.lang.IndexOutO...

Custom ArrayAdapter for autocomplete showing all results

stackoverflow.com - 2012-03-07 09:39:09 - Similar - Report/Block

This is my custom ArrayAdapter public class CustomAdapater extends ArrayAdapter implements Filterable { private ArrayList<String> mData; private ArrayList<String> orig; private ArrayList<String> suggestions; LayoutInflater inflater; @SuppressWarnings("unchecked") public CustomAdapater(Context...

How to fix java.util.ConcurrentModificationException error when trying traverse in ArrayList

stackoverflow.com - 2012-05-11 08:06:47 - Similar - Report/Block

I'm trying to add new object to my ArrayList if it satisfy the condition. But it got me this ConcurrentModificationExeption when I tried to run it. Hope you could help me: public void addTaskCollection(Task t){ ListIterator<Task> iterator = this.taskCollection.listIterator(); if(this.taskCollection.isEmpty()) this.taskCollection.

Android Base Activity: Base's Global Variables, Can't get from some activites

stackoverflow.com - 2012-07-07 02:48:36 - Similar - Report/Block

I'm taking an android class now, so I am somewhat new to android app development. My first assumption for a Base Activity is that it's Global Variables and it's values would be available to all activities. I have found that it is available to my Main Activity, but not any activities after that. In the Base Activity I am storing an ArrayLi...

Spinner inside dynamic listview

stackoverflow.com - 2012-04-22 16:36:06 - Similar - Report/Block

Hi all and thanks for your time. I am trying to create a listview with custom rows, every row contains a spinner. I am filling the row with data like this: ArrayList<HashMap> list = new ArrayList<HashMap>(); HashMap row = new HashMap(); row.put("Land_Links", c.getString(1)); row.put("Land_Rechts", c.getString(2)); row.put("Dat...

Returning an ArrayList from an ASMX Service

stackoverflow.com - 2012-03-12 17:15:47 - Similar - Report/Block

I have a couple of questions regarding Web Services, and I would really appreciate if someone could point me in the right direction. In my class library, I have a two classes: Hotel & RoomType. Hotel class contains an ArrayList of RoomType objects. In my Web Service, I have a GetHotels method as follows: [WebMethod] [XmlInclude(typeof...

Obesity is getting crazy

godlikeproductions.com - 2012-07-28 08:47:32 - Similar - Report/Block

Take a look around. Its at the moment you realize that you are a minority that you realize how bad its gotten Now realize that the good generations are... - Poster: Anonymous Coward (UID 234911) - Updated: 07/28/12 2:47 AM - Views 11 - Replies 1...

Java - Using generics to generate random objects?

stackoverflow.com - 2012-02-26 11:27:17 - Similar - Report/Block

I am trying to use generics to create an object that can be a type of T, is this possible? public class SoapObjectToModel <T> { public ArrayList<T> convert(SoapObject soapObject) { ArrayList<T> result = new ArrayList<T>(); // Somehow initialize an object of type T }...

Send ArrayList from BroadCastReceiver to Activity

stackoverflow.com - 2012-03-13 10:10:51 - Similar - Report/Block

Scenario: I have an Alarm scheduled to run on a specified amount of time. Each time is executed, my BroadCastReceiver fires. In BroadCastReceiver I do all kind of checks and in the end it results a ArrayList of Notify class I display an Notification on the Statusbar When the user taps on a Notification, I display an Activity. I need in...

how to make a phonebook, stored the data in a collection and displaying in a jtable?

java-forums.org - 2013-05-19 12:00:59 - Similar - Report/Block

hi guys, i'm trying to make a phonebook, but i don't know why my input data is not stored in ArrayList and not displayed in the jlist private ArrayList pers = new ArrayList(); public void add(Person p){ pers.add(p); System.out.println(p); but nothing appear on the jlist form. for this method add i must use firecontentschanged? if some...

Deep copy arraylist (NO CLONE)

java-forums.org - 2013-05-01 21:29:42 - Similar - Report/Block

Hi. I have a public class called MyPersonList and I was wondering how to create a deep copy of arraylist for the copy constructor. The elements are mutable, so i Know i can not use shallow copy. Im new to this topic and help would be awesome. Here's what I have Code: public class MyPersonList { public ArrayList people; /** * Instantiat...

Avoid checking for nil when accessing subelement

stackoverflow.com - 2012-07-04 11:02:02 - Similar - Report/Block

This is maybe a more cosmetic problem, but I find it really annoying as I always end up with some ugly code. And readability is always important, right? I want to check if a value exists in a hash within a hash. So what I do is this. already_exists_data[:data][:user_id] But that can get me a nullpointer exception if :data is nil and check...

Java ArrayList implementation

stackoverflow.com - 2013-04-26 10:02:32 - Similar - Report/Block

I have been trying to compare definition of list and its implementation in Java as I feel there is a mismatch. Definition Of List DataStructure : a list or sequence is an abstract data type that implements an ordered collection of values, where the same value may occur more than once. [Taken from : http://en.wikipedia.org/wiki/List_(abstr ...

DownloadStringAsync wait for request completion

stackoverflow.com - 2011-02-21 21:45:55 - Similar - Report/Block

I am using this code to retrieve an url content: private ArrayList request(string query) ArrayList parsed_output = new ArrayList(); string url = string.Format( "http://url.com/?query={0}", Uri.EscapeDataString(query)); Uri uri = new Uri(url); using (WebClient client = new WebClient()) { client.DownloadStringAsync(uri); } // how...

Why doesn't ArrayList print correctly?

stackoverflow.com - 2012-04-03 20:22:42 - Similar - Report/Block

ArrayList c = new ArrayList(); c.Add(new Continent("Africa", af)); c.Add(new Continent("America", am)); c.Add(new Continent("Asia", a)); c.Add(new Continent("Oceania", oc)); c.Add(new Continent("Europe", eu)); c.Sort(); for (int i = 0; i < c.Count; i++) Console.WriteLine("{0}", c[i]); output: TP.Continent TP.Continent TP.Continent TP.C...

Paginating an ArrayList

stackoverflow.com - 2012-04-25 12:14:22 - Similar - Report/Block

I am trying to create a simple pagination routine for values held in an ArrayList . Basically what I want to do is render the first five elements in the ArrayList at first go. And then when users click on Next (increment by another 5) Previous (decrease by 5) My logic looks like this: class foo private static final int defaultStep = 5;...

Nullpointer Exception in parameter passing

stackoverflow.com - 2013-04-24 08:29:35 - Similar - Report/Block

Hi I am workin on form. in which on button click I get value that is number. Then I convert it to int and pass it to anothr function updateData(int k). While calling "udateData(id2)" I get the nullpointer exception. please help. thanks in advance. line number 608 is: updateData(id2); if ( ae.getSource( ) == buttonUpdate) { int id2; Stri...

how to use jstl arraylist in jsp

stackoverflow.com - 2013-03-18 09:11:22 - Similar - Report/Block

I have problem to show data in jsp page with help of jstl. there is code and also error that i have got ; my JSP PAGE is UserId First Name Last Name DOB Email Id Action ">Update ">Delete Add User this code where we fetch ALLUSERLIST IS : public ArrayList getAllUsers() ArrayList USER = new ArrayList(); try iduQuery = "select *...

Умножение элементов массива на число - Java SE (J2SE)

cyberforum.ru - 2013-04-21 14:01:31 - Similar - Report/Block

Необходимо умножить ArrayList массив на число int . Есть ли готовые методы для этого? Попробовал создать собственный. Вот что получилось: Код: public static ArrayList multiplyElements(ArrayList arg, int k){ ArrayList result = new ArrayList<>(); result = arg; for (int i = 0; i Проблема в том, что после использования multiplyElements...

Afficher un arrayList dans Table swt

developpez.net - 2013-05-04 16:49:05 - Similar - Report/Block

Bonjour, je suis débutant en programmation java. Je voudrais afficher le résultat de mon arrayList dans une table. J'ai 2 fichiers. L'un pour le ArrayList et l'autre pour l'interface contenant la table. Merci de votre aide. Code: package viewer; import java.sql.Connection; import java.sql.ResultSet; import java.sql.SQLException; import ja...

Zahlen in zufälliger Reihenfolge

hackerboard.de - 2013-03-05 16:51:56 - Similar - Report/Block

kleine Lösung in Java... [SPOILER="Java"] Code: iimport java.io.FileWriter; import java.io.IOException; import java.text.DecimalFormat; import java.util.ArrayList; import java.util.Collections; public class Zufallszahlen { /** * @param args */ @SuppressWarnings("unchecked") public static void main( String[] args ) { //Variablen init...




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