Latest Tutorials| Questions and Answers|Ask Questions?|Site Map



Home Answers Viewqa Java-Beginners core Java Collections

Have Programming Question? Ask it here!
 
 
 


laxman
core Java Collections
1 Answer(s)      5 years ago
Posted in : Java Beginners



Advertisement
View Answers

September 14, 2009 at 1:52 PM


Hi Friend,

The Vector implements a growable array of objects. It contains components that can be accessed using an integer index like an array. The size of a Vector can grow or shrink as needed to accommodate adding and removing items in vector.

Example:

import java.util.*;
public class VectorDemo{
public static void main(String[] args){
Vector<Object> vector = new Vector<Object>();
int primitiveType = 10;
Integer wrapperType = new Integer(20);
String str = "tapan joshi";
vector.add(primitiveType);
vector.add(wrapperType);
vector.add(str);
vector.add(2, new Integer(30));
System.out.println("the elements of vector: " + vector);
System.out.println("The size of vector are: " + vector.size());
System.out.println("The elements at position 2 is: " + vector.elementAt(2));
System.out.println("The first element of vector is: " + vector.firstElement());
System.out.println("The last element of vector is: " + vector.lastElement());
vector.removeElementAt(2);
Enumeration e=vector.elements();
System.out.println("The elements of vector: " + vector);
while(e.hasMoreElements()){
System.out.println("The elements are: " + e.nextElement());
}
}
}

Difference between Array and Vector:

1.Vector is implemented from List interface where as array is a primitive
2.The size of a vector can be changed dynamically where as size is fixed in array.
3.Vector is Synchronized where as array is not
4.Vector can store only object references where as Array can store primitive data type.

Thanks


Related Tutorials/Questions & Answers:
core Java Collections - Java Beginners
core Java Collections   what is Vector? send me any example what is differece between Array and Vector? Why Vector is called Sychronized?  Hi Friend, The Vector implements a growable array of objects
java collections
java collections  what are all the methods and things added for collections in java5 and java6 please kindly reply me as soon as possible
Advertisements
Collections in Java
Collections in Java  What is Concurrent Hash map
Collections in Java
Collections in Java  What is Concurrent Hash map
java collections
java collections  Dear Friends plz help me to complete this program import java.util.*; public class StringDemo { static String a="{a=100;b=200;c=300... achieve this plz without using stringtokenizer with any collections!!!  
collections in java
collections in java  please explain me the flow of this program..i m getting o/p as 2 1 1..y not 2 1 0..is it that if we change the i2 value,it doesnt remove. import java.util.*; public class Mapit { public static void main
collections - Java Interview Questions
collections  The Java Collections API  Hi friend, Java Collections of API (Application Programming Intreface) Consists of several... information on Java Collection API visit to : http://www.roseindia.net
java Collections - Java Beginners
java Collections   HI Friends, I want to pick a random element from a set.How can i achieve this.I have a set of objects , I want to pick a random object every time from the set..  Hi Friend, Try
wt are the collections in java
wt are the collections in java  plese send me the reply   Hi Friend, Java Collections API (Application Programming Interface) Consists... tool to the creation of custom data structures. For more information on Java
collections - Java Interview Questions
collections   what is the way to insert map values into a set in collections
Collections
/java/jdk6/introduction-collections-api.shtml http://www.roseindia.net/javacodeexamples/index.shtml http://www.devmanuals.com/tutorials/java/collections/index.html...Collections  Hi, Please send a study material on collections
java collections - Java Beginners
java collections  i need a sample quiz program by using collections and its property reply soon as possible ....   Hi Friend, Try the following code: import java.io.*; import java.util.*; class Test { String
java collections - Java Beginners
java collections  Object o1=new Object("hello"); Object o2=new Object("hello"); is hashmap add these objects?  Hi Friend, The constructor of Object class doesn't contains any parameter. IF you want to any object
core java
core java  how to display characters stored in array in core java
Collections - Java Beginners
Collections  I want to know about the new for loop used in collections... can anyone explain in short..? If possible can you give some sites..., http://www.roseindia.net/java/jdk6/introduction-collections-api.shtml
collections - Java Interview Questions
in Array of type Integer. Collections : ArrayList al = new ArrayList
collections in java - Java Interview Questions
collections in java  What is collection
core java
core java  what is the Difference between collections and reference... in size collections are not fixed in size. 2) There is no underlying data... is defined. 3) Arrays doesn't prevent duplicate objects while Collections does. 4
core java
core java  basic java interview question
CORE JAVA
CORE JAVA  CORE JAVA PPT NEED WITH SOURCE CODE EXPLANATION CAN U ??   Core Java Tutorials
core java
core java  i need core java material   Hello Friend, Please visit the following link: Core Java Thanks
Java: Collections Class
Java NotesCollections Class The java.util.Collections class contains static utility methods for manipulating collections. Some useful Collections.... There are many more methods in Collections, but the above are a good start. Copyleft
Collections in Java
Collections in Java are data-structures primarily defined through a set of classes and interface and used by Java professionals. Some collections in Java that are defined in Java collection framework are: Vectors, ArrayList, HashMap
core java
core java  Hi, can any one expain me serialization,Deseralization and exterenalization in core java
core java
core java  Hi, can any one exain me the concept of static and dynamic loading in core java
Core JAva
Core JAva  how to swap 2 variables without temp in java
core java
core java  how can we justify java technology is robust
collections
collections  why we need collections.when we will use collections in our applications
collections
collections  in collections can we perform binarysearch on arraylist elements without sorting them
CORE JAVA
CORE JAVA  What is Garbage collection in java? What is the role of a developer for garbage collection
core java
core java  its compulsory to save file name and class name is same in java
Core Java
Core Java  How to execute cmd command through java?? Give Code of them
core java
core java  write a java program to view product details from product table
Core Java
Core Java  Hi, Can any one please share the code for Binary search in java without using builtin function
Core Java
Core Java  Please write a Java Program to design login form and store the values in file & validate and display the MainForm
core java
core java  In java primitive variables will get its default value automatically after declaration. Then why it is mandatory to initialize a variable before using
core java
core java  Hello sir,What is logic behinde the core java programms,How may programmas are there,for example,sorting of two numbers,grade of the student details,fibonice serice,paldroma,incremting of the program,asscedding
core java
core java  Hello sir,What is logic behinde the core java programms,How may programmas are there,for example,sorting of two numbers,grade of the student details,fibonice serice,paldroma,incremting of the program,asscedding
Core Java
Core Java  Hi, Can any one please expain me why derived data types are required in java as we have primitive data types with us
Core Java
Core Java  Hi, Can any one please expain me why derived data types are required in java as we have primitive data types with us
Core Java
Core Java  Hi, can any one please tell me the uses of return type,"Super" and "this" calling statement in Java?? why do we required this,super calling statement?? why return type is required
Core Java
Core Java  How to load class dynamically in java ?   To load class dynamically you can use Class class method Class.forName("abc.xyz.MyClass"); This method load the given class at run time
Core Java
Core Java  what is a class
Core Java
Core Java   How can i write own compile time and runtime exceptions in java   Hello Friend, Please visit the following links: http://www.roseindia.net/java/exceptions/how-to-throw-exceptions.shtml http
Core Java
Core Java  Is Java supports Multiple Inheritance? Then How ?   Hi Friend, Java does not support multiple inheritance but it can be achieved by using the interface. In Java, Multiple Inheritance can be achieved through
Core java
Core java  How to use hyperlink that is href tag in core java without swing, frames etc. My code is StringBuffer oBodyStringBuffer = new StringBuffer("Message Classification: Restricted.\n\n
CORE JAVA
CORE JAVA  What is called Aggregation and Composition
core java
core java  surch the word in the given file
Core Java
Core Java   Hi, Can any one please tell me the program to print the below matrix in a spiral order. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Thanks a lat in advance
core java
core java  I am having 10 countries in the data base as back end.in front end i am having a button in web page like SHOWCOUNTRIESLIST so i need java code how to retrive that 10 countries from back end to my page,,pls help me
Advertisements
 

 

 

DMCA.com