Difference between "extend" and participate"?

I have two Airport Extremes and a Time Capsule. One Extreme is in my home office, which is in the basement at the far corner of an "L" shaped house. The TC sits upstairs, midway through the house, and the other Extreme is at the distant end of the house (with an Apple TV plugged into it). Set up this way, I get good signals for laptops etc. throughout the house.
I just noticed in checking in Airport Utility that the Time Capsule is set up to join a wireless network and the distant Extreme is set up to extend a wireless network. (The Extreme in my office is set up to allow the network to be extended.) I guess I'm not sure what the difference is between joining and extending, and whether this setup is optimal or not. Any thoughts? Thanks.

+In my old setup, there was an option to simply "join" the network, which I guess is really all I want to do. Not sure it makes a difference in reality, but I'm wondering why that option is no longer there. Any idea?+
If you hold down the "option" key on your computer, you may see the "join" option. But, "join" on an AirPort Extreme really does nothing useful. I'm not sure it even works, but even if it did, the ethernet ports are not active in this setting and the device will not "extend a wireless network" in the "join" setting. I can't think of a reason why anyone would want to use this setting. My guess is that is why Apple "hid" the "join" setting.
+(As an aside, I am assuming that these new dual-band Airport Extremes have solved the issue of "g" devices slowing down the network when they join... I assume that is the point of the dual-band gear.... am I correct?)+
Yes, this is correct. Faster devices work on one band and slower on another and the slower devices do not slow down the faster devices.

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Difference between extends and implements

hi
i am new to java. i need to know the difference between extends class implement class.
can anybody explain in simple words? i am new too oops concept also?
what are the conditions to use extends class, implement and interface?
class b extends a implements c
i know class a is a super class and class b is a sub class.
if class b extends class a means how should be the class a, what about the methods?
and class a implements class c means what should be the conditions?
i searched in Internet but the explanation is not very to me.can body explain me please?
thank you

sarcasteak wrote:
Your class can implement an interface, which means it must use the methods defined in the interface.No, it doesn't need to use them. It needs to implement them. Or be declared abstract.
Note that the methods in the interface are empty,No, they're not. They're abstract.
// empty method
void foo() {}
// abstract method
abstract void foo();(The abstract keyword is optional for interface methods, since they're all abstract.
and you have to define what they do in your class that implements the interface.Just like they have to for abstract methods in a class you extend, if the child class is not declared abstract.
There really isn't any difference between "extends" and "implements." There is no situation where you can choose. Any case where one is legal, only that one is legal. They could just as easily be a single keyword.
Presumably the OP's real question is, "When do I use a class for a supertype vs. using an interface for a supertype?" The answer to that, of course, is:
Use a class when at least some of the methods have valid default implementations. Use an interface when that is not the case. And of course the two are not mutually exclusive. It's quite common to do both.
At the end of the day, an interface is really nothing more than a class that has no non-final or non-static member variables and whose instance methods are all abstract, and from which you can multiply inherit.
Edited by: jverd on Feb 4, 2010 1:56 PM

Difference between Extend and Implement

Hello guys, I still dont get it, i'm confuse, when to use Extend and when to use Implement . What's the big diference? Can anyone give me an idea?

I keep getting an error with this class which states: "Type parameter RectangleOperand is not within it's bounds"
import java.util.*;
public class RectangleOperand extends Rectangle2D.Double implements Addable<RectangleOperand>
 public RectangleOperand (double w, double h)
 super(0.0,0.0,w,h);
public static RectangleOperand readRectangle(Scanner scan)
 double doubleValue;
 doubleValue = scan.nextDouble();
 RectangleOperand rectangle;
 return rectangle = new RectangleOperand(w,h);
public boolean equalTo(RectangleOperand opnd2)
 boolean equal = true;
 if(this.width == opnd2.width && this.height == opnd2.height)
 equal = true;
 else
 equal = false;
 return equal;
public RectangleOperand plus(RectangleOperand opnd2)
 double newWidth, newHeight, width, height;
 newWidth = (this.width) + (opnd2.width);
 newHeight = (this.height) + (opnd2.height);
 RectangleOperand rectanglePlus = new RectangleOperand(newWidth,newHeight);
 return rectanglePlus;
}

The Difference between Extending a Wireless network and WDS?

I have an Extreme (n) and an Express (n).
I want to make sure the signal is strong upstairs and share a printer (connected to the express) and use AirTunes. I also may add an external drive to the Extreme.
What's the difference between Extending a Wireless Network and using WDS? Will there be a speed difference?
Message was edited by: J. Christopher Edwards

I think you don't get it
If I have another draft N router that operates at 2.4G and I have only n devices I can still use WDS and it will connect using draft n in the 2.4G band.
If one g device connects to the network will go in mixed mode.
The AEBS will still report 130 Mbps for your n clients and 54 for your g clients.
If the other router is g only obviously you can't connect between the two router at n mode but still the AEBS will be in mixed mode and not in g. The Extreme will still report 130 Mbps for the connected n clients.
I can tell you that because I have actually implemented it am not taking off the documentation.
The same device if I try to use the "extend n network" does not even see the AEBS but will happily keep the n in the WDS mode and though the bandwidth is halved it is still more than g.
In any case enough for this!

Difference between implements and extends

Hi all,
what is the difference between implements and extends. i am sorry to ask this silly question, but i am new to JAVA.
Thanks
Balaji

when you extend a class, your class that you are coding inherits every method and field from the extending class. For example:
public class CustomFrame extends JFrame {
//Your class's methods will be in here, but so will all of JFrame's methods.
}You can override (most) methods from extended classes if you want them to do different things than they normally do. The most commonly overriden methods when using swing are stuff like paint(Graphics g). It needs to be overriden to repaint all of the components.
When you imlpement something, you have to specify an interface. Interfaces have methods in them with no code. If you implement an interface, all methods in in must be defined. If not, the code will not compile. Some interfaces like ActionListener extend other classes to perform stuff. The actionPerformed(ActionEvent e) method will perform an action when a button is pressed, etc.

Difference between Implement and Extend

what is the difference between implements and extends and why do we use them
thanks,

classes extend one other class and implement as many
interfaces as they wish.
interfaces extend as many interfaces as they wish.But for all that, they both just mean "inherits."
There wouldn't even have to be two different words, since you never have a choice between X extends Y and X implements Y. For a given X and Y, only one of the two will be legal.

Whats the difference between implements and extends!??

Can an interface be extended or not??
If it can whats the difference between implements and extends??
Thank you!

Code Sample:
interface a implements aa{This is illegal. An interface cannot implement another interface. It can only extend another interface.
interface a extends aa{That's the way to do it. As already said above:
An interface can only extend another interface.
A class can extend another class.
A class can implement zero or more interfaces.
So, "implements" is only used for classes that implement interfaces. For the rest, "extends" is used.

Help me clarify: Difference between Joining and Extending Wireless Network

I've eventually figured out how to get my AirPort Express to allow my Mac Pro access to the internet Via Ethernet cable by joining an existing wireless network. What's the difference between that and extending it? By extending it I loose my ability to use the ethernet to connect to internet on my Mac Pro. Odd thing is though when I initially used AirPort Utility to set up my AirPort Express, I went through all the options to get it configured to access my existing network and I checked option to allow internet access through ethernet. All is well, but then I still don't have access to the internet through the ethernet and I noticed that the setting is on Extended. Just curious why it would give me the option to use the ethernet, set it on extended and not even work.

I've eventually figured out how to get my AirPort Express to allow my Mac Pro access to the internet Via Ethernet cable by joining an existing wireless network. What's the difference between that and extending it?
When "joining a network," the AirPort Express Base Station (AX) acts just like any other wireless client (laptop, desktop, printer, etc.) You would want to configure the AX to join a network when you only want to use it to share a USB printer and/or stream iTunes.
When "extending a network," the AX can perform as either a main, relay, or remote base station in a Wireless Distribution System (WDS). A WDS is primarily used to extend a network wirelessly.
By extending it I loose my ability to use the ethernet to connect to internet on my Mac Pro.
If the AX is configured as either a relay/remote base station in a WDS, you actually can use it's Ethernet port for Internet access. Of course, this relay/remote must be connected to a main base station, that itself, has Internet access.

What is the difference between start() and run()

Hi:
what is the difference between start() and the run()???
in my app, i have
Console.debug( "starting thread to listen for clients" );
_server = new Server( this );
_server.start();
_server extends Thread..
why everytime i use server.start(); my app will terminate on it is own, even though in my servr.run() method, i have a while loop
and if i call _server.run() explicitly in my code, that while loop will be in execution
can someone let me know??
thnx

what is the difference between start() and the
run()???start() is a method on Thread that tells it to start.
run() is a method in the object that the thread executes.
why everytime i use _server.start(); my app will
terminate on it is own, Err.... I'm not convinced this is true. It'll throw an IllegalThreadStateException, if you try to restart an existing thread.
If that's what you're saying.
even though in my _servr.run()
method, i have a while loopI don't see the connection. Are you saying that the while loop never terminates, and you don't see why the thread is terminating?
and if i call _server.run() explicitly in my code,
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Difference between BBP_GET_STATUS_2 and CLEAN_REQREQ_UP reports

Could someone explain in simple way what is the difference between BBP_GET_STATUS_2 and CLEAN_REQREQ_UP reports? I have read the differences in standard documentation but it is a little confusing.
Thanks!
Regards,
Madhur

Hi
CLEAN_REQREQ_UP (Cleaner Job)
You can use this function for document types Shopping cart, (Local) Purchase Order, Confirmation, and Invoice to trigger a synchronization with the associated documents in the back-end system. The system checks whether and how the (follow-on) documents were posted in the back end, and updates the object link and references, as well as the document status.
A job (background processing) is generated for the program CLEAN_REQREQ_UP. When this is run, the system queries a database table containing the transfer information of the documents to the back end. The entries are checked with the data of the respective back-end systems. If the back-end transfer is successful, the respective entries are deleted and the prerequisites for further processing are created.
BBP_GET_STATUS2 (Status Job)
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Until this job runs, the user will not see the number of the backend document created in R/3 for a particular shopping cart in the history tab of the check status transaction.
Some more information :
Go to:
SPRO->IMG->Integration with Other SAP components->Advanced Planning and
Optimization->basic Settings for the Data Transfer->Change Transfer->
change Transfer for Transaction Data->Active Online Transfer using BTE
Here you should maintain the application 'SRMNTY' with active flag.
Once this customizing is enabled, whenever a follow-on document
(either confirmation or invoice) for an extended classic PO is created
in the backend R/3 system, the R/3 system communicates to the SRM system
by creating an entry in the table BBP_DOCUMENT_TAB for this PO.
The item level of the SRM PO has fields to store the actual quantity
and values entered for the corresponding confirmations and invoices.
After that, run the reports CLEAN_REQREQ_UP and BBP_GET_STATUS_2.
When the report CLEAN_REQREQ_UP runs this will update the
PO with statistical information. With the latest information in
BBP_PDIGP table (statistical information) the query should work fine.
Summer

Difference between BBP_GET_STATUS_2 and CLEAN_REQREQ_UP

Hi experts,
Could you point out the difference between BBP_GET_STATUS_2 and CLEAN_REQREQ_UP in SRM? What is its significance both in classic and extended classic scenario?
Thanks,
Madhur

Hi,
CLEAN_REQREQ_UP:
It checks whether the backend documents (namely-PR/PO/RES) have been created in the backend systems. Deletes obsolete table entries in SRM as well as updates document numbers in the Shopping Cart. You can't process the SC in SRM until this updae is complete.
BBP_GET_STATUS_2:
It ensures that the information on the back end documents is upto date. Retrieves the updated information from the BE systems (for exaple-it retrieves PO number after it was converted from a PR)
Above reports are mandatory both both Classic and ECS.
Regards,
GM

Differences between SLIN and Code Inspector

Hi,
Can anyone tell me the differences between SLIN and Code Inspector(SCI)..?
and in which cases we use SLIN and SCI..?
and as an ABAPer, which one should we prefer..?
Thanks,
Pradeep.

Hi
Extended syntax check or SLIN is used to check the program in all aspects for the different syntaxes like
When you use select single whether you have passed all the key fields or not>
whether you have maintained the text elements texts or not,
Have you used UNIT...CURRENCY along with the QTY and AMOUNT fields when displayed using the WRITE statement
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Difference between ALV and Table control

Hi folks,
i want to know the major differences between AlV and table controls.
i know that table control is designed in screen painter, but i want to know the major diff between Table control and ALV.
helpful answers will be rewarded.
Regards,
Naveen

Hi Naveen,
Basically ALV is a way to display the output and Table Control is designed in screen painter through which you can get entries in Table Control, can delete some records etc for further processing and its not use only for Display.
ALV is Application List viewer:-
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Rewards if useful.
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Hi guru's what is the difference between table and temlate in smartforms

hi guru's what is the difference between table and temlate in smartforms

Hi Vasu,
Template is used for proper allignment of data which table is used for displaying multiple data.
We can say Template is for static data and Table is for dynamic data.
Suppose we have a requirement in which we have to allign the customer address in such a way as shown below:-
Name- Vasu Company- WIPRO Location- Chennai
Desig- S/W Native - Mumbai
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When we include a template inside a loop it gives the same property as a table.
When we have mutiple data which is to be extended to the next page like when we display all employee details in a company we use table.
Table has 3 sections , HEADER, ITEM ,FOOTER
The header secntion will be executed once and it will loop at the item level. at the end footer will be executed.
Hope this gives u some idea..
Please reward if useful
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sunil kairam.

Differences between archiving and inactivating a qualitative lookup within the Data Admin toolkit.

Hi,
Can you please let me know what could be the difference between archiving and Inactivating the Qualitative Lookup in Data Admin Tool Kit.
Thanks,
Rohini M

When you inactive or archive something it is no longer available for selection.   The difference between inactive and archive is that inactive items will still appear available for searching purposes while archive items will not.
So lets say you have the following:
List A
   - Item 1
   - Item 2
List Items
If you were to inactivate Item 1, end users would no longer see it available for selection when using the qualitative extended attribute. However when they search for specs based on the extended attribute they would still be able to select Item 1 so they could find objects that used that value. If you were to archive Item 1, end users should no longer see it available for selection anywhere - including searching.
Lists
If you were to inactive or archive the entire List A, you would no longer see it available for selection when setting up qualitative lookup extended attributes.   I don't think there is anywhere you can search for extended attributes by lookup list currently out of the box so these would act similar. If there was a place to search for extended attributes by lookup list then it would follow the same rules as above.

Difference between "extend" and participate"?

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