Fn + Spacebar - when to use this?

I have never seen Fn + Spacebar do anything. On the paper that came with the ThinkPad, it says this magnifies the screen contents. But nothing happens when using this with the net, or looking at an image, so when does this work?

It should've came preloaded. If you installed a stock OS, then it would've been part of the Hotkeys Integrations package.
It's just how it's done. Better than a huge EXE always staying resident to handle every possible hotkey action.
W520: i7-2720QM, Q2000M at 1080/688/1376, 21GB RAM, 500GB + 750GB HDD, FHD screen
X61T: L7500, 3GB RAM, 500GB HDD, XGA screen, Ultrabase
Y3P: 5Y70, 8GB RAM, 256GB SSD, QHD+ screen

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When to use "this." when not to ?

Hi, I know this will be a basic question, but can someone tell me the rule of when to use this.method/variable/etc and when not to ?
If I have (And I'll cut down the code,leaving construtors, etc.)
public abstract class DataStuff
protected String message = null;
protected void clearMessage()
this.message = null; // Do I use this.
message = null; // Or not ?
} // End clearMessage()
} // End Class ---------
Lets get more complicated
public class MoreStuff extends DataStuff
public void someMethod()
this.message = "Do I use This ?";
message = "Or Do I not ?";
this.clearMessage(); // or
clearMessage();
} // End someMethod()
} // End Class ------
I know this will be fairly simple, and I am sure there are lots of Tutorials I could not find that explain the difference between "this"
thanks
Paul

Besides using the this reference for instance variables that have the same name as a local variable, it is also used when your class implements an interface and uses it in the class. Let me further explain. Lets pretend that you create a JFrame that has buttons on it. You want your buttons to handle events so you add an ActionListener to the buttons. You also want to code your event handling in the JFrame so you cause your JFrame to implement the ActionListener interface and implement the required method actionPerformed() in your JFrame class. Well, when you add and actionListener to the buttons, you have to use the this reference in the method signature. See code for example.import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class ExampleJFrame extends JFrame implements ActionListener {
   public ExampleJFrame() {
      super("Example using 'this' reference!");
      Container c = getContentPane();
      JButton button = new JButton("Push Me");
      /* Here is the example of how the 'this' reference is
         used. Since this class implements ActionListener,
         that means it is an ActionListener. So, when
         we add the method addActionListener to the button,
         it requires that an ActionListener be put into
         the method signature. So, I just pass a reference
         to this class into it (using the 'this' reference).
         Its actionPerformed method will be called. There
         are 3 ways I could think of to handle the
         events for this button. One is to do it the way
         I chose to do it; that is, have the originating
         class (ExampleJFrame) handle it. That is where
         the 'this' reference comes into play. Two is
         to use an anonymous inner class. The second
         option is useful if the code is small and
         self contained. Three is to have another
         class handle it, such as an Action. */
      button.addActionListener(this);
      c.add(button);
      /* incidentally, you could put the this keyword in
         front of each of these methods for readability,
         but most people don't. I used it on the first
         one to demonstrate it. */
               //cause the program to end when closing
      this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      pack();
      setVisible(true);
   }//end constructor
   /*=**************************************************
   * actionPerformed(): required ActionListener method *
   public void actionPerformed(ActionEvent e) {
      /* the this reference is also used in here because
         the showMessageDialog() should have as its
         parent a component and we want the component to
         be this JFrame */
      JOptionPane.showMessageDialog(this,"You used the this pointer!");
   }//end actionPerformed
   public static void main(String args[]) {
      /* when you run this class, a small JFrame with
         a button will appear in the top left corner. */
      ExampleJFrame app = new ExampleJFrame();
   }//end main
}//end ExampleJFrame classtajenkins

I have macbook pro 2012. I 'm using netbeans 7.2 for using programming. It took about 700mb when I use this application.

I have macbook pro 2012 4gb ram. I 'm using netbeans 7.2 for using programming. It took about 700mb.

I'm runing out of memeory when I use other applicaiton such as safari with netbens and inactive memory not clearing when not enough memory for other application.Why is this happing? Does netbens application leak memory?

What is repair request? when we use this?

Hi all,
what is repair request?
when actually we use this?
Thanks& Regards,
Ravi Alakuntla.

Hi Ravi,
When you find some records missing when deltas are running then instead of going for re-init and again deltas you can go for repair full request giving selection conditions for those missing records, without affecting your delta laods.
Hope it helps,
Sunil.

When to use 'this' keyword

Hi,
I saw some code for a class which extended JFrame
at the end of the constructor it says:
this.setVisible(true);
but of course it works when we have just:
setVisible(true);
I know how to use 'this' in other ways but what is the point of having it here
Cheers
Jim

'this' is used for making differences between class variables and local variables.
public class Test {
private int value;
public void setValue(int value) {
this.value=value;
regards
Stas

What is a Factory method and when to use this concept?

Could any one please describe what a factory method is and explain how I can use it by giving a simple example

A Factory Method (sometimes called a "virtual constructor") is a way to avoid hard coding what class is instantiated. Consider:
DataSource myDataSource = new DataSource();Now, if you want to use some other DataSource in your app, say, an XMLDataSource, then you get to change this code and all subsequent lines that use this, which can be a lot. If, however, you specified and interface for your DataSources, say, IDataSource, and you gave the DataSource class a static "create" method that would take some indication of what sort of DataSource to actually use, then you could write code like:
IDataSource myDataSource = DataSource.create(dataSourceString);And be able to pass in a dataSourceString describing what DataSource you wanted to use - and not have to recompile. Check out the Java Design Patterns site ( http://www.patterndepot.com/put/8/JavaPatterns.htm )
Make sense?
Lee

Type Casting? When to use this concept?

There is one question bothering me very very much.
When should I use type casting?
For example
ClassNameQ c = (ClassNameQ) ......displayable
How do I know which 'cast type' to use? Is there a suitable pattern
we need to follow so that we can know 'Ah this is the cast
we need to use'
Please can any one point out which 'Cast type' points needs to be
followed?
Regards

You can Cast an object from any subclass to its superclass,
or from a superclass to the sublass, if the object is already
an object of the subclass.
I have a class named Name:
public class Name {
I have a subclass named LastName:
public class LastName extends Name { [/b]
And another named FirstName:
[b]public class FirstName extends Name { [/b]
I create an object like this:
[b]LastName ln = new LastName("Johnson");
Then pass it to a method that can work on all names:
capitalFirstLetter(ln);
capitalFirstLetter(Name n) {
Now n in CapitalFirstLetter can be used only as a Name
object. Anything specific to the LastName object can't be used.
So if I need to use things specific to LastName I have to cast
the object to LastName. There is a problem, however, since this
method can work on all Names, so I don't know if the Name is
a LastName or not. The object itself DOES know, however, and
we can test, so we would cast to a subclass as follows:
if (n instanceof LastName) {
LastName ln = (LastName)n;
ln.addToGeneology();
} else of (n instanceof FirstName) {
FirstName fn = (FirstName)n;
fn.addOccurance();
Steve

What is a factory method? when to use this concept?

Could any oneplease describe what a factory method is and explain how I can use it by giving a simple example?

Instead of instantiating a class all over your program you do it in one method that's part of the class. This means the class gets control over the instantiating process, a factory.
1. You can implement a dispose facility, that is giving back objects that can be reused (when the factory method is called an old object is returned if there is one in store, only if not a new one is instantiated).
2. An abstract class can have a factory method that returns concrete classes on demand, like
abstract class Hello {
   static newHello(int id) { // factory method
      switch (id) {
      case 0: return new Hi();
      case 1: return new Howdy();
      return null;
public class Hi extends Hello {
public class Howdy extends Hello {

Why runstate.sequencefile.data.seq.mysequence.mystep.result.numeric doesent contain a measurement value when i use this in a post uut callback?

Hello
I want to write a csv file witch contains all measurement values and limits from my machine. So i try to give the values in post uut callback to a vi. The limits are working and the csv contains all my limit values but the measurement values are all 0. I used runstate.sequencefile.data.seq.mysequence.mystep.result.numeric
I would not like to do it with FileGlobals because they are much values.
Thanks for any advices for this problem.
Solved!
Go to Solution.

There's probably a better way to accomplish what you want. But to make your life easier I'll give you the hacky solution:
Use: Runstate.ProcessModelClient.Data.Seq.MyStep.Result.Numeric
The funny thing is the report should contain all the information you want. I would just create an engine to convert it to your csv look. If you are using 2012 then this seems like a perfect candidate for a plugin.
Hope this helps,
jigg
CTA, CLA
teststandhelp.com
~Will work for kudos and/or BBQ~

160n halt when connected using this method

hi there,
I have the following scenario which cause router 160n to be down
I have a 160n linksys router which is used as dsl router and directly connected to the internet, and I have another linksys router 160n which is connected to the first 160n router "DSL Router", and linux server (Squid & dhcp) which is also connected directly to the first 160n router " DSL router",
the problem accurs when I turn my linux srever on, the DSL router start flashing its lights and stop working until I disconnect my server and restart the router.
I wonder if anybody can help,
thanks with best regards

Make sure you have different IP for both routers and they are cascaded correctly. Search the Linksys web site on how to cascade two routers correctly.

I am unable to use the about:permissions command from the url bar, when I use this command receive error message "The url is not found and cannot be loaded".

This was advertised as a new security feature in the nightly build . Is this true has this security been added to Firefox 5.0 or only certain Firefox builds ?

Yes, that about:permissions page has recently been added to the Nightly builds (7.0a1), but the Aurora builds (6.0a2) have it as well. I don't think that Firefox 5 will get it.
* [https://bugzilla.mozilla.org/show_bug.cgi?id=573176 Bug 573176] - Implement Site-Specific Privacy Preferences
* http://www.mozilla.com/en-US/firefox/channel/

Just downloaded trial CS6 Photoshop. How to start when NEVER used this type of software EVER?

Downloaded trial CS6 Photoshop to see if it is suitable for our application prior to purchase. Having NO experience with this type of software, how do you start? Must be something simple I am missing. Can't find how to insert picture/photo/text let alone manipulate for desired effect. PLEASE HELP. I made it so far as opening a new file WOO HOO.

Hello and welcome!
I would first take a look at this beginner's forum FAQ. One of them is how to open a photo in Photoshop. It has step-by-step directions on the subject.
To further discover Photoshop:
AdobeTV has a great set of video tutorials called "Learn Photoshop" .
Any questions you might have, feel free to post back here.
enjoy!
-janelle

When to use the new file based content repository

In Service Pack 4 there's a new implementation of the CMSPI interfaces which is configured by using the following implementation class:
com.bea.content.spi.internal.FileSystemRepositoryImpl
When should one use this new file based repository versus the existing one (configured by using the following class: com.bea.content.spi.internal.RepositoryImpl).
I've read the edocs, but it doesn't state when to use this new one compared to the previous implementation.
We consider using a third party content repository, but for the time being we will use the content repository provided by BEA.
Trond Andersen, Invenia AS, +4798290811

use the new keyword when you don't have an instance of that object in memory that you want to use. For example...
if you have an object already in memory that is holding a property with a "CamelQuery" object, then you can say
var query = myobject.Query;
however, if you have to write the query, or instantiate the object from nothing, then you need to use the "new" keyword. A good example is SPSite object...
if you can get a new SPSite object by either "newing one up and passing the URL" or getting the farm and getting a site from that object.
using(SPSite site = new SPSite("url to my site"))
now I can use site.
//or
SPSite = myWebApp.Sites[0];
// this gives you site at index 0 of current webApp
most of the time in SharePOint you will be using the "new" keyword to open site collections, and then getting your subsites from there. BE CAREFUL using the "new" keyword. If you "new" up an object that is iDisposable... you
MUST dispose of that, but if you use that same object but it comes from the "current context", you mustn't dispose of it.
//dispose of this by using statement
using(SPSite site = new SPSite(<url>))
//do stuff
//after this bracket it is disposed.
//do not dispose of this:
SPSite mysite = SPContext.Current.Site;
//unpredictable behavior can occur because you will still need references to your current site.

When to use GET LATE command in LDB

Hi,
Can anyone tell me the the use of GET LATE command in logical database,
when to use this..
example will be more helpful.
Regards,
Mrunal

Hi Frd
        If you want to perform calculations or other operations which are not associated with certain additional fields, you can formulate ABAP code for the GET and GET LATE events of a logical database table when creating an InfoSet. The code for GET events is particularly important if you have defined parameters or selection criteria for the InfoSet. It is here that you must define the code to check whether a table line is to be evaluated or not.
Example
REPORT demo_program_get_late.
NODES: spfli, sflight, sbook.
DATA weight TYPE i VALUE 0.
START-OF-SELECTION.
WRITE 'Test Program for GET node LATE'.
GET spfli.
SKIP.
WRITE: / 'Carrid:', spfli-carrid,
           'Connid:', spfli-connid,
         / 'From: ', spfli-cityfrom,
           'To:    ', spfli-cityto.
ULINE.
GET sflight.
SKIP.
WRITE: / 'Date:', sflight-fldate.
GET sbook.
weight = weight + sbook-luggweight.
GET sflight LATE.
WRITE: / 'Total luggage weight =', weight.
ULINE.
weight = 0.
Reward Me Point
By
Pari

I've a problem with QuickTime controlbar when I use transparent wmode

Hello All,
I've a problem with QuickTime controlbar. When I use this code :
<object height="592" width="690" codebase="http://www.apple.com/qtactivex/qtplugin.cab#version=6,0,2,0" classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B">
<param value="http://streamer.podcast.ulg.ac.be/reflexions/scienceensamusant/doccafe/D ocHorlogesBis.mov" name="src">
<param value="true" name="autoplay">
<param value="true" name="controller">
<param value="true" name="kioskmode">
<param value="true" name="loop">
<param value="video/quicktime" name="type">
<param value="transparent" name="wmode">
<embed height="592" width="690" type="video/quicktime" loop="true" kioskmode="true" controller="true" autoplay="true" pluginspage="http://www.apple.com/quicktime/download/" src="http://streamer.podcast.ulg.ac.be/reflexions/scienceensamusant/doccafe/Doc HorlogesBis.mov">
</object>
with transparent wmode, the controlbar don't print correcty on IE7/IE8.
If I use this code without wmode='transparent', It work but my css menu doesn't work.
Anybody can help me ? Thank in advance.
JP

Hello,
The suggestion made by Golubkov is correct. Make sure that you have configured the CAN objects to correspond to the Ports- for instance, Port1 to CAN0 and Port 2 to CAN1.
If this dosen't fix the problem, let us know what the error message clearly states ( can be found out by clicking on the details tab).

Fn + Spacebar - when to use this?

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