deny eldo

• Aug 24th, 2006

When a class implements singlethreadmodel this class object can acess the code in a synchronized manner. that is one at a time(single thread)

diala

• Aug 16th, 2006

Can some one explain clearly what is thread safe

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deny eldo

• Aug 24th, 2006

Basically it depends upon your convinence but what I have knownwhen we consider version control, where a modification of many component depends upon many classes which are repetadly used in multi...

M.Nagaraja

• Aug 1st, 2006

If we want to implement  all the methods in a child class then w e will go for Interface and if we want to implement a few methods , if we want to use a few methods of its super class we go for Abstract class.

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Use abstract class because we implement only requried methods of abstract class but for interface we must implement all methods whether or requried or not

msarada

 Profile Answers by msarada Questions by msarada

• Aug 24th, 2006

if we want to have all the other properties of the abstract class along with the unimplemented methods, then we prefer an abstract class otherwise we go for an interface(in order to have multiple inheritance).

katam

 Profile Answers by katam Questions by katam

• Nov 14th, 2005

Abstract class

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msarada

 Profile Answers by msarada Questions by msarada

• Aug 24th, 2006

the reason is, generally we extend a class if we want to enhance or modify the existing class.Thread class has several methods including run().Runnable interface has only one method i.e. run().in any ...

premmm

 Profile Answers by premmm Questions by premmm

• Jul 29th, 2006

Thanks FYI raviThis is prem, could you send me mail about youpremkumar.cm@gmail.comtxsPremmm

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Annapareddy SrinivasRao

• Aug 18th, 2006

Hi all!It seems be good Q?the answer is for this Q?in my view ........Beans( JAVA CLASSES) ?are different from web componets ...( Servelts & JSPs)web components always serves the web requests? means...

Nagapratap

• Jun 7th, 2006

Java doesnot support multiple inheritance to avoid situations that arise ambiguity. For Eg: If Class A contains a method : public void show(String s) and Class B also contains the method: public ...

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vsolanke

 Profile Answers by vsolanke Questions by vsolanke

• Aug 13th, 2006

Anonymous classes are classes that don?t have a name (hence the term anonymous). Because they don?t have a name, there is no way to refer to them. For this reason, their declaration must be given at c...

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siva kumar reddy

• Aug 9th, 2006

hi,a class with in the class is called innerclass.it is a safety mechanisam.innerclass variables are accessed througth outerclass variables only.anonymous class is an innerclass whose class name will be hidden .whom will be created only object.cheerssiva

rabbi

 Profile Answers by rabbi Questions by rabbi

• Jun 29th, 2006

 To help you get a handle on inner classes and what they are good for, let's visit the "Stack" class.Here's a "Stack" implementation that defines a helper class, called StackIterator&nb...

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suseela

• Aug 9th, 2006

"==" will compare string objects and returns true r false.

ravikgoru

 Profile Answers by ravikgoru Questions by ravikgoru

• Jul 27th, 2006

What is the difference between equals and "=="

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Sharad Keer

• Aug 7th, 2006

Transiate is a access modifier that can not be serialized, Means it is unable to maintain its state.If we declare any varrible as transiate then that varrible is cannot be serialized.We cannot send that data onto the network.

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satya

• Aug 3rd, 2006

Thanks shiva for u r answer but concept of runtime is jvm checks the obj reference at runtime which class is instantiated to the obj it will be a super hierarchy i got it and thanks further

chaitanya

• Aug 2nd, 2006

This is good example program

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Vivek

• Jul 31st, 2006

overloading  :- Same method name,Different signature and return type doesn't matter.Overloading is generally used in same class.methods which perform the same task but in different wasy are given...

fine questions

• Jul 11th, 2006

Overloading is resolved at compile time and overriding is resolved at run time.

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JohnJosephKiernan

 Profile Answers by JohnJosephKiernan Questions by JohnJosephKiernan

• Jul 30th, 2006

Premm, see replies #20 and #21, and the JLS.If Java doesn't have pointers why are they mentioned in the JLS? and why does it have a NullPointerException?It doesn't have pointers with the semantics you describe: that's a different issue.IMHO what it doesn't have is *references* actually.

premmm

 Profile Answers by premmm Questions by premmm

• Jul 29th, 2006

Hi anupamaActually, java does not use pointers.s1 is an object.Let us consider the following situation.If you write username and password in your login page using pointer. go and see the view source o...

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Aruna Subbarao

• Jul 28th, 2006

TreeSet is the collection which maintains order as well as Sorting..

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Joseph Kiernan

• Jul 27th, 2006

The default buffer size is not specified for any buffered class and can vary between implementations. All that the Javadoc says is 'The default is large enough for most purposes.' I could tell you wha...

sahu

 Profile Answers by sahu Questions by sahu

• Jan 27th, 2006

ans:default buffersize 512 bytes

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soumya

• Jul 19th, 2006

I dont think there is provision for finding address space but yes you can find the total memery and free memory by usiing commands freeMemeory() and totalMemory

Paul

• May 21st, 2006

I don't know whether you can get the address of the object or not.. but ...hashCode will not give you the address.

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rajsinghgec1

 Profile Answers by rajsinghgec1 Questions by rajsinghgec1

• Jul 13th, 2006

When a reference object encapsulates a reference to some other object, which is called the referent.

Sathya

• Apr 11th, 2006

A reference variable or constant declared as 'final' has a value that is immutable and cannot be modified to refer to any other object than the one it was initialized to refer to. Thus the 'final' spe...

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manyam

• Jun 29th, 2006

Narrowing: done by JVM automatically; won't give any compile time errorWidning: you have to cast explicity, otherwise compiler will throw an error (lpossible loss of precision)--Mani

SURENDER REDDY B

• Jun 28th, 2006

Widning and Narrowing will appear in the Casting operation. Widning is nothing but converting lower datatype to higher datatype when we cast the datatypes.Narrowing is nothing but converting higher da...

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rabbi

 Profile Answers by rabbi Questions by rabbi

• Jun 29th, 2006

if you change any sub component in a top label container then ,suppose you change some button layout in a frame then that will automatically call by paint to update to validate. that means three metho...

shyju

• Jun 20th, 2006

validate() method is used to cause a container in frames to lay out its subcomponents once again. It should be invoked when this container's subcomponents are modified.

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parimmallarekha

• Jun 24th, 2006

tagged interface is nothing but null interface that means interface without any methods ex programmeinterface black{}interface orange{}class drink1 implements black{}class drink2 implements orang...

srinivas

• Mar 10th, 2006

hi friendss,tagged interface is an interface which is not have any method body so it also called as null interface and marker interface. we need to use that interfaces in java bcoz it provides some in...

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Jitender

• Jun 21st, 2006

An assertion is a statement in the that enables you to test your assumptions about your program. Syntax: assert Expression1 : Expression2 ;

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