Getting an Element : ArrayList « Collections « Java Tutorial

Home
Java Tutorial
1.Language
2.Data Type
3.Operators
4.Statement Control
5.Class Definition
6.Development
7.Reflection
8.Regular Expressions
9.Collections
10.Thread
11.File
12.Generics
13.I18N
14.Swing
15.Swing Event
16.2D Graphics
17.SWT
18.SWT 2D Graphics
19.Network
20.Database
21.Hibernate
22.JPA
23.JSP
24.JSTL
25.Servlet
26.Web Services SOA
27.EJB3
28.Spring
29.PDF
30.Email
31.J2ME
32.J2EE Application
33.XML
34.Design Pattern
35.Log
36.Security
37.Apache Common
38.Ant
39.JUnit
Java Tutorial » Collections » ArrayList 
9.11.12.Getting an ElementPrevious/Next

The ArrayList class supports retrieval of a single element by index with 'public Object get(int index)'.

import java.util.ArrayList;
import java.util.List;

public class MainClass {
  public static void main(String args[]) throws Exception {

    List list = new ArrayList();
    list.add("A");
    list.add("B");
    list.add("C");

    System.out.println(list.get(2));

  }
}
C
9.11.ArrayList
9.11.1.ArrayList Class
9.11.2.Creating an ArrayList
9.11.3.A boolean is being stored and then retrieved from an ArrayList
9.11.4.The final constructor is the copy constructor: creating a new ArrayList from another collection
9.11.5.Adding Single Elements
9.11.6.Adding elements in the middle of a List
9.11.7.Add an element to specified index of ArrayList
9.11.8.Append all elements of other Collection to ArrayList
9.11.9.Insert all elements of other Collection to Specified Index of ArrayList
9.11.10.To create a read-only list, use the unmodifiableList() method of the Collections class
9.11.11.Adding Another Collection
9.11.12.Getting an Element
9.11.13.Get Sub List of ArrayList
9.11.14.Removing a Single Element
9.11.15.Removing Another Collection(Removing elements): public boolean removeAll(Collection c)
9.11.16.Retaining Another Collection: public boolean retainAll(Collection c)
9.11.17.Removing Ranges
9.11.18.Fetching Elements with iterator
9.11.19.Checking for Existence: public boolean contains(Object element)
9.11.20.Checking for Position
9.11.21.Checking for List Containment: public boolean containsAll(Collection c)
9.11.22.Replacing Elements with the set() method: public Object set(int index, Object element)
9.11.23.Checking Size: public int size(), public boolean isEmpty()
9.11.24.Checking Capacity
9.11.25.After adding all of the elements, call the trimToSize() method
9.11.26.Copying and Cloning Lists: public Object clone()
9.11.27.ArrayList implements the empty Serializable interface
9.11.28.Checking for Equality
9.11.29.Copying elements out of a list into an array
9.11.30.Convert a List (ArrayList) to an Array with zero length array
9.11.31.Convert a List (ArrayList) to an Array with full length array
9.11.32.Copy all elements of ArrayList to an Object Array
9.11.33.Remove duplicate items from an ArrayList
9.11.34.Removing All Elements
9.11.35.Looping through a Collection object: while loop, iterator, and for each
9.11.36.If an ArrayList contains a given item
9.11.37.Search an element of ArrayList with indexOf and lastIndexOf
9.11.38.Get container with Iterator from ArrayList
java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.