Please advise me the difference between two ways of declaration of java constructor
public class A{
private static A instance = new A();
public static A getInstance() { return instance;
}
public static void main(String[] args) {
A a= A.getInstance();
}
}
AND
public class B{
public B(){};
public static void main(String[] args) {
B b= new B();
}
}
Thanks
Could someone please explain the difference? From what I understand, I could expose my data directly using WCF data services or expose it using OData.
http://msdn.microsoft.com/en-us/data/aa937697.aspx
Hi, I'm trying to figure out the difference between w3wp and msvsmon. Both seem to be remote debugging tools that run on the web server, and we can attach to them via Visual Studio to help in debugging live applications. Is this correct ? If so what are the differences between them ? many thanks.
I'm trying to return a IDictionary<int,int> (created with dict tuplist) from F# to C#, but it says that I must include a reference to FSharp.Core because of System.Collections.IStructuralEquatable.
I've tried returning a Dictionary<_,_>(dict tuplist), but that doesn't make any difference.
I even tried Dictionary<_,_>(dict tuplist, HashIdentity.Reference), but that says that int is a struct...
Hi
I am looking looking into the options for tweaking the performance of JBoss 5.1.0 and one of the options available to me is to disable the generation of debug information when compiling JSPs.
I know that the presence/absence of debug information for the JVM makes no real difference, but does the generation of that debug information add much to compile time?
Thanks in advance
Richard
For example, let's use the Add method of the ArrayList class. If I am using the default compiler settings in Visual Studio C# project in which arithmetic overflow is not checked, would ArrayList.Add() throw an OverflowException if I added too many items? Would surrounding the method call with checked or unchecked make any difference?
BTW, I would write a test program to determine the answer to this question if I had Visual Studio available to me right now.
I want to disable the orange highlight that occurs when touching a listView row. So far in my xml I have tried the following:
android:focusable="false"
android:focusableInTouchMode="false"
android:clickable="false"
More information: I want there to be zero difference when a user touches the screen on this listView object.
Hey,
I know whats the difference between a NULL value and an empty string ("") value, but if I want to get a value by using the OR keyword, I get no result for a NULL value
The table i want to query looks like this:
titles_and_tags
+----+----------+------+
| id | title | tag |
+----+----------+------+
| 1 | title1 | NULL |
| 2 | title2 | tag1 |
| 3 | title3 | tag2 |
+----+----------+------+
The query i use looks like this:
select * from `titles_and_tags` WHERE `title` LIKE "title" AND `tag` = "tag1" OR `tag` IS NULL
So i want to get here a rows (id: 1,2), BUT this results 0 rows. What have i done wrong?
Hey Everyone,
I was wondering, are there any basic speech recognition tools out there? I just want something that can distinguish the difference between "yes" and "no" and is reasonably simple to implement. Most of the stuff out there seems to make you start from scratch, and I'm looking for something more high level.
Thanks!
Thinking that the answer to this is pretty obvious but here it goes:
When I am working on a small project for school (in java) I "compile" it.
On my coop we are using ant to "build" our project.
I think that compiling is a subset of building. Is this correct? What is the difference between building and compiling?
I know the difference between manage and unmanaged DirectX. My question is if I decided to do managed directX as a starting point, would it help me to better understand unmanaged DirectX. Honestly, the only thing I see different about the 2 is how you initiate and access resources. Matrix Math is Matrix no matter what so If I learn it in managed, then I should be fine in unmanaged
I have seen many answers in stackoverflow , but i didnt find an answere that is matching mine .
Apart from all those difference , Does it makesense if we say An Abstract class abstracts the implementation of behaviour while an interface abstracts the type which implements the behaviour.
Hi there!
I was reading this C# article about the usage of properties and methods. It points out why and when to use properties or methods.
Properties are meant to be used like
fields, meaning that properties should
not be computationally complex or
produce side effects
I was asking myself how you could express this difference in Java, where you only use getters for the retrieval of data.
What is your opinion?
Hi I am new to WPF.. Can any one tell what is the difference between standalone applications and XAML browser applications (XBAPs) and how it differs in handling navigation and other stuff..
Does anyone knows if removing the field names from an INSERT query results in some performance improvements?
I mean is this:
INSERT INTO table1 VALUES (value1, value2, ...)
faster for DB to be accomplished rather than doing this:
INSERT INTO table1 (field1, field2, ...) VALUES (value1, value2, ...)
?
I know it might be probably a meaningless performance difference, but just to know.
May I know what is the difference among lazySet and set method for AtomicInteger. javadoc doesn't talk much about lazySet :
Eventually sets to the given value.
It seems that AtomicInteger will not immediately be set to the desired value, but it will be scheduled to be set in some time. But, what is the practical use of this method? Any example?
Is there a difference between a package and a folder in eclipse?
for example, if I have this hierarchy requirement:
java –classpath C:\ChatCompany\BackendChatServer\ -Djava.security.policy=c:\HW2\permissions.policy hw2.chat.backend.main.ChatBackendServer when the package's name is:
"hw2.chat.backend.main" and "ChatCompany\BackendChatServer\" is the folder name, then how can I make this separation between a package and a folder in eclipse, so that I can write
"package hw2.chat.backend.main" and not "package ChatCompany.BackendChatServer.hw2.chat.backend.main"?
thanks
Hi Guys
Is there any real great (really good) difference between NET Framework 3.5 and NET Framework 4.0?
Perhaps something regarding performance?
thank you
Dear experts, I am quite new to javascript and I often see coders use those lines interchangeabaly.
document.body.getElementsByTagName();
and
document.getElementsByTagName();
What is the difference, benefits?
Does this have anything to do with FF and IE?
I'm implementing the Express Checkout?
I have no problem with the first two steps:SetExpressCheckout and GetExpressCheckout,but met the "Security header is not valid" at DoExpressCheckout.
The API credentials are the same!
I've fixed it by changing the $environment to live in DoExpressCheckout.(The difference is that it'll use https://api.sandbox.paypal.com/nvp/ instead of https://api-3t.$environment.paypal.com/nvp)
But why?
Is there something wrong with https://api-3t.$environment.paypal.com/nvp?
I want to take two times (in seconds since epoch) and show the difference between the two in formats like:
2 minutes
1 hour, 15 minutes
3 hours, 9 minutes
1 minute ago
1 hour, 2 minutes ago
How can I accomplish this??
Hi, writing a article about development cloud computing applications, and
i dont know how a call cloud software, the title article is architeture and
design of (eg. On demand Application), how definition i can use??i am very confused about this definition wanna know the difference of this concepts:
Cloud Application,On demand application and SaaS application.
thx