Eliminate Duplicates in Arraylist

Eliminate Duplicates in Arraylist

View Answers

March 26, 2009 at 11:32 PM

Hi friend,

Code to help in solving the problem :

import java.util.*;
public class RemoveDuplicate {

/** Creates a new instance of RemoveDuplicate */
public RemoveDuplicate() {
}

public static void main(String args[])
{
ArrayList arlList = new ArrayList();
arlList.add("a");
arlList.add("a");
removeDuplicate(arlList);
System.out.print("arlList : " + arlList);

}
public static void removeDuplicate(ArrayList arlList)
{
HashSet h = new HashSet(arlList);
arlList.clear();
arlList.addAll(h);
}
}

Thanks









Related Tutorials/Questions & Answers:
Eliminate Duplicates in Arraylist - Java Interview Questions
Eliminate Duplicates in Arraylist    Hi Friends, Can any one give sample code for removing duplicates in arraylist and hashmap...() { } public static void main(String args[]) { ArrayList arlList = new
Remove duplicates from ArrayList
Remove duplicates from ArrayList Sometimes we added large amount of data... is to add the contents to a Set (which will not allow duplicates) and then add the Set back to the ArrayList. Here is the code: import java.util.*; public
Advertisements
arraylist
arraylist  Hi how can we eliminet duplicate element from arraylist in java? how can we achieve data abstrcation and encapulation in java? how many... Duplicates from ArryaList   Encapsulation And Abstraction   
arraylist
arraylist  Hi How can we eliminet duplicate element from arraylist? How can we find highest salary from arraylist ? How can we highest key value pair from map? Thanks Kalins Naik   Remove duplicates from Arraylist
arraylist
arraylist   Using arraylist class , what type of exception are throws, how can write a java programe   An ArrayList can throw... ArraylistException { void buildAlphabet() { ArrayList list = new ArrayList
ArrayList
ArrayList  import java.util.*; class ArrayListDemo2 { public static void main(String args[]) { ArrayList al=new ArrayList(); al.add("one"); al.add("two"); al.add("three"); al.add("four"); for(int i=0;i Expected
ModuleNotFoundError: No module named 'duplicates'
ModuleNotFoundError: No module named 'duplicates'  Hi, My Python... 'duplicates' How to remove the ModuleNotFoundError: No module named 'duplicates' error? Thanks   Hi, In your python environment you
arraylist
arraylist  Hi i have class A , i have added employee name and id in arraylist, then how can i find out all infomation of class A using emplyee... data into an arraylist and display the data of the particular employee according
arraylist
% *(noOfYearService/2). Store each employee information in different arrayList depending on his
Core Java-ArrayList
Core Java-ArrayList  How do i find duplicates in ArrayList. First i add some elements to ArrayList, then how do i find the duplicates and show the duplicate elements. Give an example
arraylist of an arraylist
arraylist of an arraylist  Can anyone suggest me how to use arraylist of an arraylist?? how to put data into it and get data from it???? becoz i want to make rows and column dynamic which can grow as per requirement?????/ plz
Finding duplicates using array in for loop
Finding duplicates using array in for loop  how to find the duplicates in array using for loop
eliminate the extra space after a </form> tag
eliminate the extra space after a tag  How can I eliminate the extra space after a tag
ModuleNotFoundError: No module named 'find-duplicates'
ModuleNotFoundError: No module named 'find-duplicates'  Hi, My... named 'find-duplicates' How to remove the ModuleNotFoundError: No module named 'find-duplicates' error? Thanks   Hi, In your python
List with out duplicates - Java Interview Questions
List with out duplicates   Hi all, Naturally in java a list will allow duplicates, but if i want the list which shouldn't allow duplicates...) { List arList = new ArrayList(); arList.add("a"); arList.add("b
remove duplicates from list in java using set
example: Remove duplicates from ArrayList Thanks...remove duplicates from list in java using set  Hi, I have a list... duplicates. I searched and found that set can be used. But don't know how to do
Java arraylist duplicate elements search
Java arraylist duplicate elements search  hi, please help me finding the no of duplicates elements in an arraylist example an arraylist contains elements like: mac raj mohan frank mac tom raj mohan frank result: mac 2 raj
arraylist and vector
arraylist and vector  what is the diff b/w arraylist and vector
Java ArrayList
Java ArrayList   How to declare unique ArrayList
ArrayList and Vector
ArrayList and Vector  hello, Why ArrayList is faster than Vector?   hii,ADS_TO_REPLACE_1 ArrayList is faster than Vector, because ArrayList is not synchronized. Synchronization will reduce the performance of Vector
arraylist in java
arraylist in java  arraylist in java   Array List Example in java
ArrayList object
ArrayList object  i have am ArrayList object it containg data base records in it, now i want to display this ArrayList object data in my jsp programe, plz help me
Duplicates - Hibernate
ArrayList elements
ArrayList elements  how to print ArrayList elements in reverse order... ArrayListReverse { public static void main(String[] args) { ArrayList list=new ArrayList(); list.add("Innova"); list.add("Alto
Java arraylist of arraylist
Java arrayList can make the use of other arrayList.  In one arrayList other arrayList can be added as the object  It works as two dimension array. Example of Java Arraylist of Arraylist import
comparing arraylist of an multi dimensional arraylist
comparing arraylist of an multi dimensional arraylist  can anyone help me in solving the following issue: actually i have an arraylist called dany... have to compare each arraylist with each other. like i have to take 1st arraylist
accessor arrayList
accessor arrayList  how to use an acccessor to return an arraylist?   public List getProductList(String itemName) { List list=new ArrayList(); //Add your item in the list return list; } You may wish to browse
How to eliminate error," Could not find the main class: filecopy.FileCopy. Program will exit." ?
How to eliminate error," Could not find the main class: filecopy.FileCopy. Program will exit." ?  run: java.lang.NoClassDefFoundError: filecopy/FileCopy Caused by: java.lang.ClassNotFoundException: filecopy.FileCopy
ArrayList in java
ArrayList in java  sir i have a class Student.it contains id,name,marks of students and a parameteraised constructor.now i created an arraylist... to access marks from arraylist
ArrayList programe
ArrayList programe  How to write a java program to accept an array list of Employee objects. search,delete and modify a particular Employee based on Id Number (like ID,Name&Address
Cannot assign an ArrayList to an empty ArrayList
Cannot assign an ArrayList to an empty ArrayList  I have a java file, in which a method returns an ArrayList. This ArrayList is supposed to contain... StudentsManager's methods statically. studByYear(year); returns an ArrayList of all
vector and arraylist
vector and arraylist    suppose i have class A { public static arrylist a1(){} class B{ public static vector b1() {} } my question is how to class B method in Class A and how to get vector object values in class A without
arraylist problems?
arraylist problems?   myprogram needs to ask the user for a file name. The file will contain a name on each line. Put each of the names into an ArrayList. After you have put all of the names into the ArrayList search through
java arraylist
need to create arraylist whose name is same as type value(e.g : list1,list2... which is having type list1 in the arraylist named list1. the problem here... help how to handle this through java arraylist. xml : <?xml version='1.0
ArrayList
arraylist
arrayList
Java arraylist, linkedlist
Java arraylist, linkedlist  What is the major difference between LinkedList and ArrayList
program to display all words in the file in the sorted order without duplicates
program to display all words in the file in the sorted order without duplicates  I want a java program which accepts a file from user and displays all words in the file in the sorted order without duplicates
Arraylist in java
. but for indefinite number of elements Arraylist is used as it creates dynamic Array. Arraylist allowed to store an ordered group of elements where duplicates are allowed...ArrayList is a class that extends AbstractList and implements List Interface
Creating custom output using XMLUnit - MatchTracker duplicates the output data
Creating custom output using XMLUnit - MatchTracker duplicates the output data  how to create a custom output using xmlunit, I have tried it and used MatchTracker, but the match tracker was repeated for the total number of nodes
Remove multiple elements in arraylist
Remove multiple elements in arraylist   how can we remove multiple values in arrayList? only remove method we used for single remove.but i want to delete multiple value in arrayList
ArrayList as an argument to another class
ArrayList as an argument to another class  how do you pass arraylists as arguments to another class, and how does the method/class accept this arraylist for use
How to Convert ArrayList to Array?
How to Convert ArrayList to Array?  Hi, I am trying to learn to Convert ArrayList to Array. How it is possible? How to Convert ArrayList to Array? Thanks   Hi, To Convert ArrayList to array ArrayList.toArray
Java ArrayList Example
Java ArrayList Example  How can we use array list in java program..."); array.add("Arun"); System.out.println("ArrayList Size...++){ System.out.println("ArrayList Element"+i+" :"+array.get(i
Printing ArrayList - JSP-Servlet
Printing ArrayList   I have a code in servlet like this ArrayList total = new ArrayList (); session.setAttribute("efg",total...(request,response); to print the values in ArrayList total, I did this in my JSP
Can ArrayList accept an ImageIcon >>????
Can ArrayList accept an ImageIcon >>????  haw can create ArrayList witch can accept Image ..mean when i use add() method, instead item let me add image to the ArrayList in run time .{should be the program using GUI
arraylist with session - JSP-Servlet
arraylist with session  hi how can an arraylist stored in session.. and also how will it access?? pls give me the details with sample code..   Hi friend, Code to solve the problem : Thanks
Diff between ArrayList and Vector?
Diff between ArrayList and Vector?  What's The Difference between ArrayList and Vector Classes and Can you give me a simple Program for set and List Interface
assigning arraylist to combo box
assigning arraylist to combo box  Hi I am busy coding the Airline Reservation program, i have an arraylist of locations which i want to assing to the combo box. please help

Ads