puneet

• Dec 23rd, 2006

the main purpose of marker interface is to check the instance of that class whick is going to implement by using instanceof()method.but is reccomendedin programming code b'coz we know that why am doin...

Nandakumar

• Jul 25th, 2006

The actual purpose of marker interface is just to mark the respective class as specific to perform a respective job, like if you use serializable interface, it just makes a mark that this class can be...

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sivanesh.a

 Profile Answers by sivanesh.a Questions by sivanesh.a

• Dec 5th, 2006

Constant - > values cannot be changed, in java it is implemented using final keyword.

ravikgoru

 Profile Answers by ravikgoru Questions by ravikgoru

• Jul 27th, 2006

Final, it can be used in 3 ways,1. Variable declared as final, its contents cannot be changed. It value is constant through out the execution of the application2. Method declared as final, this method...

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Mallu Praveen

• Sep 23rd, 2006

 Is it advantage for the hashmap since it is not synchronizedif so explain with an example where it is usefuland where we cannot use hashtable

md manzoor murshed

• Aug 11th, 2006

Consider a situation when you need to call a method of some other application and assume that you don't have the source file access of that application...How you make make the method synchronized??? In this situation you can make the caller statement a synchronized statement..ThanksManzoor

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Vibs

• May 17th, 2007

Log4j is apache project...API used for logging purpose..You can have five various category of log defined and while coding you can write log as per the category..viz DEBUG,INFO,WARN,ERROR,FATAL..for gib projecct its advisable to use log4j instead of system.out.println.Thanks

Anindya Mandal

• Aug 9th, 2006

Log4j is the property file where you can assign the current application mode in"DEBUG", "INFO", "ERROR", "WARN" etc.sO at the time of  running the application you can see "DEBUG" , "ERROR", etc. related  messages in Tomcat Webserver.

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Kris

• Jan 28th, 2007

Also, Linked Lists perform better since, to grow, one only need add a node and adjust some 'pointers'ArrayList objects are supported by an underlying array (hence the name), thus, to grow, the ArrayLi...

Shrikrishna

• Aug 11th, 2006

public class ArrayList extends AbstractList implements List, RandomAccess, Cloneable, SerializableResizable-array implementation of the List interface. Implements all optional list operations, and per...

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Plane Old Java Objects

NAIK

• Sep 14th, 2006

PLAIN OLD JAVA OBJECT

sateesh

• Aug 21st, 2006

Thank u

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N.SRINIVASAN

• Oct 10th, 2006

In the object oriented paradigm all the objects that you code exist as objects. In all object oriented languages we have arrays to store and send and retrieve. To store objects the similar way we have...

raniraja_f2

• Sep 12th, 2006

S ur Correct

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Programming Langauge,Development Enivironment,Application Environment,Deployment Environment.

sandhya

• Apr 4th, 2007

   Hi !       Can we Define Java as  a simple ,portable,platform independent programming language used for internet applications  

ramana

• Sep 19th, 2006

java is the one type of coffieand it is useful for developing for the real time fuctionalitiesex. debit cards

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AnandKarthick

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• Sep 11th, 2007

Struts will be the right canditate to be used in the Web layer, and Spring will be the right canditate for the business layer, because Struts have the best support with tag support built in. Spring has the advantages of IOC and dependency injection which will fit right in the business layer.

abhishek jethwani

• Feb 5th, 2007

Spring is better frame work than struts in realtime.in Spring you can use the same instance of the class once you create it in .xml with help of getter and setter but in case of struts you have to cre...

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sampra

 Profile Answers by sampra Questions by sampra

• Mar 11th, 2008

Collections.sort(al)

g4java

 Profile Answers by g4java Questions by g4java

• Sep 14th, 2007

Use Collections.sort()

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sampra

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• Feb 15th, 2008

Object--throwble---error/exception

sujatham

 Profile Answers by sujatham Questions by sujatham

• Aug 3rd, 2007

Object class is the super  class for all the java classes.Exceptions in Java are objects. All exceptions are derived from the java.lang. Throwable class.The two main subclasses Exception and Erro...

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sampra

 Profile Answers by sampra Questions by sampra

• Feb 14th, 2008

Legacy classes are something like old verson

g4java

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• Sep 14th, 2007

Legacy classes are something like older versions when compared to new ones and that are now harder to maintain.

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sampra

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• Feb 14th, 2008

If you want to change the design of the application at the time of implementation

vijay DJ

• Aug 16th, 2007

If you want to change the design of the application then we will go for the Interface.

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sampra

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• Feb 22nd, 2008

With the help of serilization and exterlization  

g4java

 Profile Answers by g4java Questions by g4java

• Sep 14th, 2007

Its done by standard java serialization.

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Employee object having emp name, emp id, emp salary... An arraylist has a list of employee object.How will you sort this arraylist?

Gaurav Singh

• Jul 13th, 2011

Implement the Comparator Interface for the Employee Class. Then customize your sort in the implemented method from interface

NGKiran

 Profile Answers by NGKiran Questions by NGKiran

• Mar 15th, 2011

Implement Comparable interface for the class Employee, customize your require in the implemented method from interface

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If all the methods in the Abstract class is defined, then it is a Abstract class? And can we make object out of it?

sampra

 Profile Answers by sampra Questions by sampra

• Mar 16th, 2012

We cant create the instance of abstract class ..here we need sub class which extended this class .we can have ref var of abstract class

Amit Khaware

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• Jun 29th, 2011

First thing first, An abstract class without any abstract method means you are loosing the main intent fo abstractness, why we are making abstract class is to provide some of common implementation and...

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What is use of the servletconfig

josesaid

 Profile Answers by josesaid Questions by josesaid

• Jul 27th, 2011

The ServletContext is the way to comminucate with the whole application, and the servletconfig is to communicate just with the actual servlet... Greetings..."java5 this.getServletC...

vinodk.05

 Profile Answers by vinodk.05 Questions by vinodk.05

• Jul 27th, 2011

ServletContex is used to hold information required through out application. One object created for per application and remain active until server is up. while servlet config is used to hold informatio...

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lhariPrasad

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• Mar 18th, 2008

Can you specify why it is 8 Bytes, Does it cast to Long Int / Int ?

sampra

 Profile Answers by sampra Questions by sampra

• Mar 11th, 2008

Object always take 8 byte memory

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geeksterrahul

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• Jul 25th, 2009

One simple answer:Static(per class) members are created one instance/class loader/class instance. so they will reside until the class unloads(application closes).Meaning,they will stay during the life...

sunil kulyana

• Jul 21st, 2006

Static variables and classesIn Java, usually a class member (variable or method) is accessed in conjunction with an object of its class. In the case of static variables and methods, it is possible to ...

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nirmmal

 Profile Answers by nirmmal Questions by nirmmal

• Feb 11th, 2007

Thr is a module in the application which is not at all working so it is given high severity but it will be have low priority if that module gets discarded for the release.

sudhir deshmukh

• Nov 3rd, 2006

The example is :Suppose you have an login screen on which if you will enter a 100 word password (normally no one is using) than it will come under high severity but at the release time if you are not ...

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