Satpal Godara

• Apr 17th, 2014

Swing is lightweight, have more components, operating system independent look & feel

Antony

• Oct 17th, 2013

When the application need rich GUI functionlaity then use swing

Answer Question  Select Best Answer

CareerBaba.in

• May 7th, 2014

Opening database connection is a time consuming operation. Connection pooling increases the performance of the applications by reusing the active database connections instead of create new connection ...

mani.sivapuram

 Profile Answers by mani.sivapuram Questions by mani.sivapuram

• Feb 23rd, 2011

In the previous days database connections are maintained by database only for example oracle database is having 10 database connections are there.Consider at the same time 10 clients are asked for a p...

Answer Question  Select Best Answer

swati pandey

• Sep 30th, 2014

SP Implicit Objects are the Java objects that the JSP Container makes available to developers in each page and developer can call them directly without being explicitly declared. JSP Implicit Objects ...

Chadan Reddy

• May 16th, 2007

Little addition to JSP implicit Objects: Implicit Objects are 9: request response page application session pagecontext exception out config These simplify JSP code by providing ready ...

Answer Question  Select Best Answer

vp

• Nov 11th, 2014

VO is simile object that holds value and it this object should be entirely immutable.

Where DTO is a serializable object which is used for transferring the data between different processes.

Answer Question  Select Best Answer

For parsing a big XML and modifying it (removing empty element), which parser should we use?

HimanshuMishra

 Profile Answers by HimanshuMishra Questions by HimanshuMishra

• Mar 27th, 2015

In java ...check StAX?parser.

Answer Question  Select Best Answer

In HttpServlet class there is no any abstract method although javasoft declared this class as an abstract
class.Ok,this is valid in java.So if we want to utilize this class we will have to extends this class.But we can use to achieve this one by using Httpservlet class as simple java class also.

Ganesh Bhat

• Apr 3rd, 2015

The interface of HttpServlet is complete, but not the implementation/functionality of it. abstract restricts a developer to use the HttpServlet as is, rather it forces the developer to extend it and p...

Sandhya.Kishan

 Profile Answers by Sandhya.Kishan Questions by Sandhya.Kishan

• Jul 4th, 2012

Java soft has declared httpservlet class as an abstract class for its performance, scalability and reusability issues and for security purpose.

Answer Question  Select Best Answer

How to explain project architecture?

Pradeep

• Apr 8th, 2015

Project architecture is very high level design of the project describing the components of the project and their interaction.

Answer Question  Select Best Answer

What is command design pattern? Explain this pattern based on below scenario
Map m=new HashMap(); HashMap m=new HashMap();
What is difference between Map m=new HashMap(); HashMap m=new HashMap();

Thomas John

• Sep 22nd, 2015

Command decouples the object that invokes the operation from the one that knows how to perform it. To achieve this separation, the designer creates an abstract base class that maps a receiver (an obje...

Ganesh Bhat

• Apr 3rd, 2015

Map m = new HashMap(); here the reference of interface Map holds the object of HashMap, this is called Liscov Substitution Principle. OO Principles encourages to write implementation to interfaces tha...

Answer Question  Select Best Answer

What is the exact use of singleton class?Just using private class constructor makes it a singleton class?

Abhishek Marshetty

• Nov 18th, 2015

The Singletons purpose is to control object creation, limiting the number of obejcts to one only. Since there is only one Singleton instance, any instance fields of a Singleton will occur only once pe...

ayush48

 Profile Answers by ayush48 Questions by ayush48

• Jun 22nd, 2015

A class having only one object or only one object of that class can be created.

Answer Question  Select Best Answer

Provide one Programming level example of Custom Exception?
Where and Why we Use Custom exception?

binita

 Profile Answers by binita Questions by binita

• Dec 15th, 2015

WE use it to handle exception. For checked exception we write a class by extending exception. Depending on requirement we write constructor, define instance variable. All IO exception, SQL and class not found are checked exception.

Answer Question  Select Best Answer

janbaskittraining

 Profile Answers by janbaskittraining Questions by janbaskittraining

• Mar 11th, 2016

What exactly does a Java developer do? On a typical day, you would be doing one or a few of the following tasks that are part of the Software Development Life Cycle (SDLC): Gather requirements. ...

Sukhrob

 Profile Answers by Sukhrob Questions by Sukhrob

• Dec 24th, 2015

Java Developers, the ones who create different programs using Java Prog. Language.

Answer Question  Select Best Answer

sandeep sandy

• May 16th, 2016

If I would like to deal 1000s and lakhs of users, is it good to depends on Session pooling?

Is amazon maintaining persistable sessions?

ambika

• Apr 18th, 2007

Its nothing but connection pool

Answer Question  Select Best Answer

Parag jain

• Jul 5th, 2016

Data objects are collection of one or more piece of data and data type is only one type of data like int, char, float

Sukhrob

 Profile Answers by Sukhrob Questions by Sukhrob

• Dec 24th, 2015

Primitive data types like byte, short, int, double, long they store data while object only has reference to the declared data. When object type called it references to the declared type.

Answer Question  Select Best Answer

How to count objects of a class ?

Jayesh v Bhatu

• Jul 31st, 2016

Declare a static count variable in and increment in constructor.

For ex:
class A{
static int count=0;
A(){
count++;
}
}

Answer Question  Select Best Answer

Balram

• Sep 19th, 2016

Can anyone send some Java Project Architectures.

Rais pal Singh

• May 2nd, 2016

Can anyone send me project architecture diagram. and plz differentiate project architecture and project approach briefly. Does project architecture follows project approach.

Answer Question  Select Best Answer

How can we implement Singleton Design pattern in multiple JVM environment? How we will make sure to be an object in multiple JVM?

Rajesh Kumar

• Apr 10th, 2017

Not sure about the tool, but if we have to do it, then we can use some clustered cache( jboss cache) and save the singleton instance in it. In your singleton code, always check for the instance in t...

tester

• Mar 29th, 2012

You cannot do that.

Answer Question  Select Best Answer

How can one class can pass message or inform other class that some event has happened, without using thread?

TRAORE

• May 14th, 2017

By using Java built in observer design patern

Shanu Shine

• Oct 10th, 2014

Use Observer design pattern

Answer Question  Select Best Answer

Srinu

• Jul 8th, 2017

Java class cant be private it throws compile time exception.
Illegal modifier for the class TestClass; only public, abstract & final are permitted

jay

• Dec 6th, 2015

Child class will not be able to inherit it.

Answer Question  Select Best Answer

Lakshmi Prasanna

• Aug 30th, 2017

java.* packages are the core Java language packages, meaning that programmers using the Java language had to use them in order to make any worthwhile use of the java language. javax.* packages are o...

amreenkhader

 Profile Answers by amreenkhader Questions by amreenkhader

• Jan 20th, 2012

Java is the extension of C++ language and javax files are those where it stores the entire program for execution in the form of files and termed as javax files

Answer Question  Select Best Answer

vishal

• Sep 21st, 2017

Pointers are such kind of data types who holds the Memory address of another variable. Use of pointer may leads in security violation. Pointers works on memory addresses directly and we cannot apply s...

sopan

• Feb 27th, 2017

When Pointer are used, it is then capable to change the memory data and get RAM memory is more exposed to pointers.
This concept collapse the memory management in JVM.
So pointers is not used. Also we don't need pointers as complete memory management is managed by JVM only.

Answer Question  Select Best Answer