You would throw a new exception.

Have a look at [Throw Statement (Visual Basic)][1]

&gt; The Throw statement throws an exception that you can handle with
&gt; structured exception-handling code (Try...Catch...Finally) or
&gt; unstructured exception-handling code (On Error GoTo). You can use the
&gt; Throw statement to trap errors within your code because Visual Basic
&gt; moves up the call stack until it finds the appropriate
&gt; exception-handling code.

**EDIT**

By request and from the link

    Throw New System.Exception(&quot;An exception has occurred.&quot;)


  [1]: http://msdn.microsoft.com/en-us/library/ty79csek%28v=vs.100%29.aspx


I am newbie to Java world (7 years of low level plain C).

When I started reading Java related sites:

 * http://wiki.apidesign.org/wiki/Main_Page
 * http://static.springsource.org/spring/docs/3.1.x/spring-framework-reference/html/

I confused by existing terminology:

 * class
 * package
 * module
 * component
 * container
 * service
 * framework
 * platform

I found many resources about terms definition (and a lot more):

 * https://stackoverflow.com/questions/3057526/framework-vs-toolkit-vs-library
 * https://stackoverflow.com/questions/7310283/difference-between-framework-and-container
 * https://stackoverflow.com/questions/1288708/what-are-the-containers-in-java
 * https://stackoverflow.com/questions/7151206/definition-of-a-java-container
 * http://martinfowler.com/articles/injection.html (Inversion of Control Containers and the Dependency Injection pattern)
 * http://www.cafeaulait.org/course/week8/36.html (What is a AWT Container?)
 * http://en.wikipedia.org/wiki/Web_container
 * http://netbeans.org/features/platform/ (The NetBeans Platform)
 * https://stackoverflow.com/questions/4241919/what-is-meant-by-application-framework
 * https://stackoverflow.com/questions/2964140/what-is-a-framework-what-does-it-do-why-do-we-need-a-framework
 * https://stackoverflow.com/questions/148747/what-is-the-difference-between-a-framework-and-a-library
 * https://stackoverflow.com/questions/724438/what-is-the-difference-between-a-class-library-and-a-framework
 * https://stackoverflow.com/questions/11576018/what-is-the-difference-between-a-javascript-framework-and-a-library
 * https://stackoverflow.com/questions/1415592/what-is-the-major-difference-between-a-framework-and-a-toolkit
 * http://blog.orderharmony.com/2011/07/libraries-vs-frameworks.html
 * http://www.javacodegeeks.com/2012/04/frameworks-vs-libraries-as-inheritance.html
 * https://stackoverflow.com/questions/48239046/difference-between-library-platform-and-framework
 * https://stackoverflow.com/questions/31503886/what-is-the-difference-between-a-platform-and-a-framework
 * https://stackoverflow.com/questions/25028243/what-is-the-difference-between-a-framework-and-a-platform
 * https://stackoverflow.com/questions/4099975/difference-between-a-module-library-and-a-framework

but each of these resources define them on its own purpose and I still can&#39;t distinct for example module from component in general case.

Please explain what means of these terms in big picture (can be single class a platform, what amount of modules is required to make a container, etc).

**UPDATE 2019** From https://www.artima.com/lejava/articles/reuse3.html (my highlighting)

&gt;  *Bill Venners*: What is the difference between a framework, a platform, and a toolkit, and what are the different flexibility needs? 
&gt;
&gt;  *Erich Gamma*: With a **platform** I associate **long term stability**. It is safe to build on top of a platform. A platform makes **compatibility** guarantees. Frameworks often do not have this quality and I have seen **many framework** failures with regard to **stability**. If you look at Eclipse, yes it includes frameworks, toolkits, and provides platform APIs. All of this is bundled as plug-ins. **Frameworks abstract and provide higher level default functionality**. To do so the **framework needs to be in control**. This loss of control can lead to what is sometimes called frameworkitis. 
&gt;
&gt;  *Bill Venners*: And toolkits don&#39;t because...
&gt;
&gt;  *Erich Gamma*: With **toolkits** you **create and call toolkit objects and register listeners to react to events**. You&#39;re **in control**. **Frameworks try to be in control and tell you when to do what**. A **toolkit** gives you the **building blocks** but leaves it up to you to be in control.

Another quotation answers my naive question how many classes makes something a framework:

https://www.artima.com/lejava/articles/reuse.html

&gt; *Erich Gamma*: ... JUnit is a small framework, for example. It is the &quot;Hello, world&quot; of frameworks. You have `Test`, `TestCase`, `TestSuite` and relationships defined. Also, you hook into frameworks by subclassing somewhere. They use the so-called Hollywood principle of &quot;don&#39;t call us, we&#39;ll call you.&quot; The framework allows you to define your custom behavior, and it will call you back when it&#39;s your turn to do something. Same with JUnit, right? It calls you back when it wants to execute a test for you, but the rest is done in the framework. 

Class vs package vs module vs component vs container vs service vs platform in Java world

So for my new app I&#39;m having a URL scheme so that people can launch my app from another app or from a website... &quot;myapp://&quot;   ...   So what happens if there is another app in the AppStore that has the same URL scheme as mine? Or if someone tries to steal my URL Scheme? 

Multiple apps with the same URL Scheme - iOS

How should an exception be raised in VB.NET?


How to raise an exception in VB.NET

<p>How should an exception be raised in VB.NET?</p>


How do you do a *verbatim* string literal in VB.NET?

This is achieved in C# as follows:

    String str = @&quot;c:\folder1\file1.txt&quot;;

This means that the backslashes are treated literally and not as escape characters.

How is this achieved in VB.NET?


How to do a verbatim string literal in VB.NET?

I&#39;m trying to wrap my head around which data structures are the most efficient and when / where to use which ones.

Now, it could be that I simply just don&#39;t understand the structures well enough, but how is an `ILookup(of key, ...)` different from a `Dictionary(of key, list(of ...))`?

Also where would I want to use an `ILookup` and where would it be more efficient in terms of program speed / memory / data accessing, etc?


Difference between Lookup() and Dictionary(Of list())

&gt; **Possible Duplicate:**  
&gt; [commenting VB code](https://stackoverflow.com/questions/1068395/commenting-vb-code)  

&lt;!-- End of automatically inserted text --&gt;

Does anybody know how to do a block comment in Visual Basic?

Note: I did a few searches on here and neither those results nor the results for &#39;Questions that may already have your answer&#39; appeared to ask this question

In Visual Basic how do you create a block comment

I want to control other application volume(firefox).

i can do it with `Volume Mixer`

![enter image description here][1]

What is the libraries of the `Volume Mixer`?


  [1]: https://i.stack.imgur.com/QzTN5.jpg

Controlling Volume Mixer

I have an assembly that I have made which is very specific to my team at my company. I want to be able to use NuGet to make this assembly avaiable to other projects that my team and similar teams at my company are working on. However, the assembly isn&#39;t really code that I want to share with the world. 

I know with Maven, you can create local repositories and source packages from a local repo. Does NuGet support similar functionality? Is there a way with NuGet to specify either a local repository or to have private packages?

Can I publish a private NuGet package?

`java.io.IOException` seems to be the most common type of exception, and coincidentally, it seems to also be the most ambiguous.

I keep seeing the `throws IOException` whenever writing with sockets, files, etc. I&#39;ve never actually had one fired on me, however, so I&#39;m wondering what it is that is supposed to fire the exception. The documentation isn&#39;t very helpful in explaining what&#39;s going on: 

&gt; Signals that an I/O exception of some sort has occurred. This class is the general class of exceptions produced by failed or interrupted I/O operations.

What are some instances where an IOException would be thrown, and how is it supposed to be used?



What throws an IOException in Java?

Try-catch is meant to help in the exception handling. This means somehow that it will help our system to be more robust: try to recover from an unexpected event. 

We suspect something might happen when executing and instruction (sending a message), so it gets enclosed in the try. If that something nearly unexpected happens, we can do something: we write the catch. I don&#39;t think we called to just log the exception. I thing the catch block is meant to give us the opportunity of recovering from the error.

Now, let&#39;s say we recover from the error because we could fix what was wrong. It could be super nice to do a re-try:

    try{ some_instruction(); }
    catch (NearlyUnexpectedException e){
       fix_the_problem();
       retry;
    }

This would quickly fall in the eternal loop, but let&#39;s say that the fix_the_problem returns true, then we retry. Given that there is no such thing in Java, how would YOU solve this problem? What would be your best design code for solving this?

This is like a philosophical question, given that I already know what I&#39;m asking for is not directly supported by Java.


How do you implement a re-try-catch?



    var err1 = Error(&#39;message&#39;);
    var err2 = new Error(&#39;message&#39;);


What&#39;s the difference? Looking at them in the chrome console, they look identical. Same properties on the object and the same `__proto__` chain. Almost seems like `Error` acts like a factory.

Which one is correct and why?

throw Error(&#39;msg&#39;) vs throw new Error(&#39;msg&#39;)

I have read many posts related to this issue, but couldn&#39;t find an answer.
I am trying to load a large amount of data from Excel into SQL Server.
Thousands of records. And I am getting this exception:

&gt; String or binary data would be truncated. The statement has been
&gt; terminated.

Obviously some values exceed the field size in the database.
The error comes from SQL Server AFIK.

----------

**My question - How could I possibly know what record and what field value caused this?**

There are no specific details in EF exception, except the one I mentioned.

Any help is appreciated.

Some asked for the code fragment, but it&#39;s actually very simple, the problem is not with the code:

    // employees is a List&lt;Employee&gt; collection loaded from Excel
    using (var context = new Entities())
    {
        employees.ForEach(e =&gt; context.Employee.AddObject(e));
        context.SaveChanges();
    }

Also the suggested approach to use **DbEntityValidationException** (which is only available in Entity Framework 5.0) is not working, the **catch** block didn&#39;t catch the exception.


    try
    {
        ImportData();
    }
    catch (DbEntityValidationException ex)
    {
        foreach (var item in ex.EntityValidationErrors)
        {
            //...
        }
    }

**The only solution that I found** so far is to use SQL Server Profiler, and define the following events to monitor:

![enter image description here][1]

![enter image description here][2]


  [1]: http://i.stack.imgur.com/mxJud.png
  [2]: http://i.stack.imgur.com/zfEu3.png

Now I can see the Email is too long.


EF Exception: String or binary data would be truncated. The statement has been terminated.?

I want to catch a specific `ValueError`, not just any `ValueError`.  
I tried something like this:  

    try: maquina[&#39;WPF&#39;] = macdat(ibus, id, &#39;WPF&#39;)
    except: ValueError, &#39;For STRING = ’WPF’, this machine is not a wind machine.&#39;:
        pass

But it raises a `SyntaxError: can&#39;t assign to literal.`  
Then I tried:

    try: maquina[&#39;WPF&#39;] = macdat(ibus, id, &#39;WPF&#39;)
    except ValueError, e:
        if e != &#39;For STRING = ’WPF’, this machine is not a wind machine.&#39;:
            raise ValueError, e

But it raises the exception, even if it is the one I want to avoid.

Content Type	Original Author	Original Content on Stackoverflow
Question	CJ7	View Question on Stackoverflow
Solution 1 - vb.net	Adriaan Stander	View Answer on Stackoverflow

How to raise an exception in VB.NET

vb.net Problem Overview

vb.net Solutions

Solution 1 - vb.net

Multiple apps with the same URL Scheme - iOS

Class vs package vs module vs component vs container vs service vs platform in Java world

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