Built-in overloaded operator

what is built-in overloading in java.
explain me with example.

what is built-in overloading in java.
explain me with example.I may be responsible for that but it isn't an established term. Java has a number of operators working on primitive types, but Java doesn't have overloading so you can't redefine them and make them work on your own classes. There's an intermediate case though and that's the + opererator working on String, like
String s = "this" + "that";This could be called "built-in" overloading I'd say. I think BigNumber is a strong candidate to given its own set of operators, maybe in version 1.6.

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Overload operator new in C++ plugins

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I have a .net web service. Its WSDL has defined overloaded operations. But when i create business service using the WSDL in OSB, OSB reflects one operation only when i create branching. Is OSB (10.3.1) able to handled overloaded operations?
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Edited by: Ichiban_indian on Jun 14, 2010 6:09 PM

Hi Kuppusamy,
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Ambiguity in overloaded operator

Hi All,
Compiler barfs regards the overloaded operator [] .
#include <iostream>
#include <string>
class String {
public:
    String() { }
    String(const char* src) : myStr(src) { }
    String(const std::string& src) : myStr(src) { }
    String(const String& src) : myStr(src.myStr) { }
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    size_t length() const { return myStr.length(); }
private:
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int main() {
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1 Error(s) detected.1) I cannot modify all the instances like, c = s[1]. There are hundreds of similar things in code.
2) operator const char* is required.
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Thanks,
Sreekar

If you have both an operator char*() and and operator[](), you will have generally have overloading ambiguities. Adding more overloads as you did might cure some of them, but apart from complicating the code and reducing maintainability, can wind up with other ambiguities down the line.
The standard string class does not have an operator char*(), but a named conversion operator c_str() instead, partly for that reason, but mostly to prevent accidental and unintended conversions from string to char*. As designed, the String class in the example suffers from both defects.
The best fix is to re-think the design of the String class. If you are under pressure to get something working and out the door now, you could settle for a workaround such as you found. But make the time later to re-design and re-code. Otherwise the problems with the existing design will continue to cause problems, including code that mysteriously fails at run time, in the future.

How to overload = operator in Java?

Like String s = "somestring" or Integer i=10, how to develop a class with '=' operator overloaded?
For example
MyClass obj = 12.3f;(similar to Float class)

I understand the answer. But how are these classes
like String, Integer and other wrapper classes built
for = operator overloading? Is this accomplished
using native code?It's just how the language is defined. [url http://java.sun.com/docs/books/jls/third_edition/html/j3TOC.html]The JLS defines how these operators are required to behave. The compiler interpets them as per the JLS, to generate the proper bytecodes.

Built-in Create operation - confusing behavior ADF BC4J, ADF Faces

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Am I doing something wrong?
Thank you

Hi,
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Need to Set Current Row when Using Built-in Data Control Delete Operation?

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------ .jspx af:table with command button to remove each row ------
<af:table value="#{bindings.ListView1.collectionModel}" var="row"
rows="#{bindings.ListView1.rangeSize}"
first="#{bindings.ListView1.rangeStart}"
// note: I don't have any code added for selectedRow or makeCurrent - assuming this is built-in?
selectionState="#{bindings.ListView1.collectionModel.selectedRow}"
selectionListener="#{bindings.ListView1.collectionModel.makeCurrent}">
<af:column>
<af:commandButton actionListener="#{bindings.Delete.execute}"
text="Remove"
disabled="#{!bindings.Delete.enabled}"/>
</af:column>
---------- corresponding pagedef file ------------
<bindings>.....
<action id="Delete" IterBinding="ListView1Iterator"
InstanceName="SrchDataControl.ListView1"
DataControl="SrchDataControl" RequiresUpdateModel="false"
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Note: I also tried solution posted on following thread, but again, only first row is deleted, not the selected row?: Delete and Commit
Message was edited by:
javaX

I just want to delete (or remove) it from the VO. Data for this VO is not on the database.
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selectionState="#{bindings.MyIspListView1.collectionModel.selectedRow}"
selectionListener="#{bindings.MyIspListView1.collectionModel.makeCurrent}"

Enum operator overloads not called

Hi,
we are faced with a serious problem of the current Forte C++ compiler version (WS6U2 with actual patches). The following test program shows that the compiler does not accept operator overloads for enums. Instead of this all enums are implicitly converted to int.
The sample compiles and runs fine with three calls to the overloaded operator|() on other compilers such as g++. The funny thing ist that also the unpatched WS6U2 Forte C++ compiler (5.3 2001/05/15) works properly here.
So, what are the concerns of the newer compiler versions from Sun? From our point the code should be accepted by an ISO C++ compliant compiler.
$ cat test.cc
enum BitFlags { BIT0, BIT1 };
BitFlags operator|(BitFlags lhs, BitFlags rhs)
return static_cast<BitFlags>(static_cast<unsigned>(lhs) | static_cast<unsigned>(rhs));
int main(int, char**)
BitFlags a = BIT0 | BIT1; // Error
BitFlags b = BitFlags(BIT0 | BIT1); // OK, but operator|() not called
BitFlags c = ::operator|(BIT0, BIT1); // OK (explicit operator call)
return 0;
$ CC test.cc
"test.cc", line 11: Error: Cannot use int to initialize BitFlags.
1 Error(s) detected.
$ CC -V
CC: Sun WorkShop 6 update 2 C++ 5.3 Patch 111685-07 2002/04/10
Thanks in advance,
Michael v. Szombathely

This regression was not reproducible and works o.k. as of patch 11685-09. So, if you get the current patch 111685-14, this problem is fixed in that patch.

ABAP OO & Overloading

Hi,
I am trying to write a class in ABAP. And I need to overload my constructor. I have tried this overloading operation by SE80 transaction. But ABAP says "There is already a constructor". Is it not possible to overload a method/constructor in ABAP?
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Hi,
ABAP does not provide overloading of methods/constructors in a way we know from other OO languages (eg. Java). You cannot write a method with the same name but different signature. You can only override methods in subclass using REDEFIITION key word but signature must stay the same.
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*& Report ZCL_OVR                                                     *
REPORT zcl_ovr                                                     .
*       CLASS lcl_a DEFINITION
CLASS lcl_a DEFINITION.
PUBLIC SECTION.
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      constructor,
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             RETURNING value(ov_b) TYPE i.
ENDCLASS.                    "lcl_a DEFINITION
*       CLASS lcl_a IMPLEMENTATION
CLASS lcl_a IMPLEMENTATION.
METHOD constructor.
ENDMETHOD.                    "constructor
METHOD do_sth.
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ENDMETHOD.                    "do_sth
ENDCLASS.                    "lcl_a IMPLEMENTATION
*       CLASS lcl_b DEFINITION
CLASS lcl_b DEFINITION INHERITING FROM lcl_a.
PUBLIC SECTION.
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      do_sth REDEFINITION.
PRIVATE SECTION.
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CLASS lcl_b IMPLEMENTATION.
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ENDMETHOD.                    "constructor
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Why not Integer.NaN?

Hello
I wonder why Integer does not supply a NaN like Double.NaN. I find the Double.Nan to be very useful.
Regards
JT

:) I think what you mean is that integers are
normally only used with the basic arithmetic
operations: +, -, *, and / (I miss having Python's
built-in exponentiation operator). These operations
never return infinity or NaN, with the single notable
exception of division by zero. And dividing by zero
is almost always an accident with integers, and is
easy to check for.Yes, that's what I meant. My post was so dumb even I have to laugh at it. First, I didn't say integers are closed over multiplication, and then I said modulo and remainder like they're two different things. And integers aren't closed under integer division because of 0, as you said.
Floating point numbers, on the other hand, are often
used with transcendental functions and fractional
exponents and things, which frequently result in
infinity or NaN. Moreover, it's important to be able
determine that the result is one of those things, so
we have constants for them. Also, it's often hard to
check these things ahead of time with these
functions.
You dig?
As an aside, I wonder if an operator-overloading
framework could be developed for Java by explicitly
basing the use of operators on interfaces. For
instance, to use the arithmetic operators, you would
implement an interface called Field. To use
the comparison operators, you would implement an
interface called Ordered (which would
basically be identical to the Comparable interface).
You get the idea. The premise would be that it
t would the operators to conform with their standard
mathematical definitions.As someone adamantly opposed to operator overloading in Java, this proposal is ok to me. If you're familiar with the matlab language, operator overloading is done there by defining functions like "plus()", etc... so its sort of similar I think. I think C++ gets difficult because you can overload operators like the function call operator (), and the member of operator(s) which gets confusing really quick.

Communications error while trying to print

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Thanks,
Jim G.

The good news is that you have done everything right so far.
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I think you will be OK. It might be a good idea to shut down the system, plug in the printer(s) and restart the system so OS-X knows they are there.
I have about 5 printers and while it's tedious to have to re-mount the printers after a Print system reset, it does seem to clean up everything, inclusing old pending and failed print jobs that might have been the problem to begin with.
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HP Envy 4500 won't print from computer

Hi,
My HP Envy 4500 has been working perfectly for quite some time now. Unfortunately, it has stopped printing from my Dell laptop, running Windows7. It scans to the laptop just fine. It copies fine, and it prints from my iPhone fine.
I have looked at a ton of posts and tried many things:
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*uninstall/reinstall via USB
*ran print/scan doctor utility (or whatever it is called) and been told everything looks fine
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I am losing my mind and would really appreciate some help.
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Hello @JNZM,
Welcome to the HP Support Forums!
I would like to assist you today with resolving the issue that you're experiencing when trying to print from your Windows 7 computer to your HP ENVY 4500 e-All-in-One Printer. Thank you for including all of the troubleshooting steps you have completed prior to reaching out for support. At this time I will be running you through some troubleshooting steps to check the actual print system on your computer. The Print Spooler is what controls printing from Windows computers. It is built into the Operating System. If the Print Spooler is experiencing issues than you will experience printing conflicts. Should the Print Spooler be experiencing a conflict, the software and scanning feature for the printer will not be affected. Can I please have you follow the steps below.
Step 1: Check Print Spooler:
Click on your Start menu
In the 'search programs and files' box located right above Start type services.msc and hit enter on your keyboard
When the Services window opens scroll down until you see Print Spooler
Click on Print Spooler once just to highlight it
If you see Start in the top left hand corner than that indicates that your Print Spooler is in fact Stopped (not good). But we will leave this for now.
If you see Stop or Restart in the top left hand corner than this indicates that your Print Spooler is actually Started. Please click on Stop to temporarily Stop the service.
Minimize this window as we will need to come back here
Step 2: Check Spooler Folder:
Click on your Start menu
Select Computer
In the Computer window select your C Drive
Click on Windows
Click System32
Click Spool
Click PRINTERS. You may get a permissions warning, just Continue past this.
The PRINTERS folder should be empty. If there is any files in here they are corrupted print jobs. Right click on anything in this folder and 'delete' the files.
Close the PRINTERS folder
Step 3: Start Spooler:
Reopen the Services window we previously minimized
Click on Print Spooler again to highlight it
Click on Start in the top left corner
If you get an error message please take note of it
If the Print Spooler starts successfully you will see 'Stop and Restart' as your options in the top left
Once the Print Spooler has started please test printing again. If printing fails, or if the Print Spooler fails to start, please proceed to the next step.
Step 4: Run Microsoft Fixit:
I'm going to have you run a Microsoft Print Fixit Tool to identify and correct any print system issues or Registry corruptions on the computer.
Please click here to access the Microsoft Fixit website
Once the page opens under section (2) select Print, fax, scan, share or save.
Under section (3) select Run Now for Diagnose and fix printer and printing problems automatically
Once the download is complete please follow the onscreen instructions to run the Microsoft Tool
Once the Fix has run, please test printing again.
Please respond to this post with the result of your troubleshooting. You can also say 'thanks' for responding by clicking the 'thumbs up' icon below. I look forward to hearing from you!
X-23
I work on behalf of HP
Please click "Accept as Solution" if you feel my post solved your issue, it will help others find the solution.
Click the "Kudos, Thumbs Up" on the right to say "Thanks" for helping!

LaserJet Pro 400 M401dn - 79 SERVICE ERROR

We have only had this printer less than a year and I am getting a 79 SERVICE ERROR. I have power cycled, unplugged and all the normal tries... no go. It will print the menu map but will not accept a print job from a user. I try to get to the printer page on HP.com but it errors out so I cannot get to any of the support docs for the model. Anyone out there have a suggestion?

I ran into this same problem with the LaserJet M401dn. I noticed this issue occured when the printer was hooked up to the PC via USB. I followed HPs steps on trying to fix this problem and needless to say, their steps weren't worth a hill of beans. The printer is working now now via these steps that I'm going to list. 1) Restart the printer with only the power cord being attached. If you're STILL getting the 79 error service, then it is most likely a firmware issue. Luckily for me it wasn't. The printer started right up as it should.2) If your printer starts right up, attach an Ethernet cable from the printer to your router/switch/DSL or cable modem.3) Select the Network icon on your printer screen and check to see if your printer has authenticated to the network and lists an IP address. If you're on a home network the IP address will show something like 192.168.x.xx. 4) Once connected to the network you'll run a firmware update. Click on your Settings icon, select LaserJet Update, Check for Updates Now. Continue by selecting the update and download and install. After the firmware installs, at this point you might be able to get the printer to work by hooking the USB cable back up to the printer. I on the other hand did a couple other steps before hooking the printer back up. 5) I installed all of the Windows Updates (critical), updated Java6) Uninstalled the HP printer software for the M401dn and restarted the PC7) THIS STEP IS NOT FOR THOSE THAT AREN'T FAMILIAR WITH EDITING THE REGISTRY. If you have no knowledge of how to edit your registry, then PLEASE DO NOT ATTEMPT this. Have someone with knowledge do this step. I, nor HP can be held responsible for any mistakes that you make with this step. DO AT YOUR OWN RISK. In the registry I searched for Packard and deleted all Keys or entries that had M401 listed. DO NOT DELETE THE KEY IF IT DOESN'T LIST M401, as there are Hewlett-Packard printer drivers that are built into the operating system and they do show up in the registry.I ran through the registry twice searching for any sign of the printer driver being installed. Restart the computer again.8) Reinstall the HP LaserJet Pro 400 M401 Printer Series PCL6 Print Driver that is relevant to your PC. (Sorry, I don't know how to deal with Macs.) DON'T download the Full Software and Drivers or the one WITHOUT the installer. Don't use the disc to install the drivers either. Just download the most recent version of the software from HPs website. Install the software and attach the printer when asked to do so. Hopefully you're golden at this point just like I was! If for some reason this doesn't work for you, I would format your hard drive and reinstall Windows and all of your software. Apparently there is something within the registry or on your computer that is keeping the printer from working. I hope this helps you all out!

Why won't my printer print with Windows 8?

Why won’t my printer print with Windows 8?
Have you just upgraded, or purchased a new computer with Windows 8, and now you can’t get your printer to work? If so, this may help you. A lot of people have questions about installing their printer on a new OS. This will help you answer those questions and make sure that you get everything installed.
Before You Start
Before you try to install the printer on a Windows 8 computer, you should check to make sure the printer is compatible with the new OS. The link below will give you a list of the printers that will work in Windows 8.
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c03168175&lc=en&cc=us&destPage=document&dlc=en
If you have upgraded your computer to Windows 8 form another version of Windows, make sure to completely uninstall all of the software for your printer. It should still print, but to use all the functions you will need to reinstall the software, if it’s available.
Another thing to consider is how you want to connect the printer to the computer.
USB. You should make sure that you have a USB cable that is no longer than 6 ft. (roughly 2m). Make sure to connect the printer directly to the computer. Do not use a USB hub.
Ethernet cable. Make sure you have the network setup, that you have a free cable port on the router, and that you have an Ethernet cable available.
Wireless. You should make sure that you have the wireless network setup, and that you have the password for the wireless network.
1.     Installing Via USB
Installing via USB in Windows 8 has become much simpler for HP printer users. In other versions of the Windows OS you had to start the installation and wait for it to ask you for the USB connection. If you didn’t, you would have to uninstall the printer from the Printers/Devices folder, and then start the install. In Windows 8, that will not be a problem. If you plug the printer’s USB cable in and then install the printer’s software, it will still work. Now for in depth instructions on installing the printer via USB click the link below.
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c03460670&tmp_task=solveCategory&cc=us&dlc=en&la...
2.     Installing Via an Ethernet Network Connection
For an Ethernet network connected printer the install is amazingly simple. All you have to do is connect the printer to the network. Once you have that done, Windows 8 will automatically install the drivers for you. Then, all you have to do is install the rest of the software, if it’s available. It’s really that easy.
http://www8.hp.com/us/en/support-drivers.html
3.     Installing Via a Wireless Network Connection.
For a wireless network connected printer the install is amazingly simple as well. All you have to do is connect the printer to the network. Once you have that done, Windows 8 will automatically install the drivers for you. Then, all you have to do is install the rest of the software, if it’s available. It’s pretty much the same as an Ethernet install, just wireless.
http://www8.hp.com/us/en/support-drivers.html
Alternate Install Methods
With Windows 8, many printers’ drivers are installed with the OS. These are known as InOS drivers, since they come built into the operating system. If you have one of those printers, all you should have to do is connect it to the computer via USB, or connect it to the network via Ethernet or wireless. Once you have that done Windows will handle the rest. There are alternate methods of installing your printer if the normal methods are not working for some reason. You can install the printer either using the Printer Install Wizard, or through Windows Updates.
Printer Install Wizard:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02681060&tmp_task=solveCategory&cc=us&dlc=en&la...
Windows Update:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c03460648&tmp_task=solveCategory&cc=us&dlc=en&la...
Note: The Laserjet drivers for the Asia-Pacific and Japan won’t be released until a later date. Check the support site linked below for driver availability. I will update this post once they become available.
http://www8.hp.com/us/en/support-drivers.html
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Built-in overloaded operator

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