Difference between paint() and paintcomponent()

What's the difference between the paint(), paintComponent(), paintAll(), repaint() and update() methods? Which one is preferred when printing graphics with a printer?

http://java.sun.com/docs/books/tutorial/uiswing/painting/index.html
http://java.sun.com/docs/books/tutorial/2d/printing/
paint ---> AWT
paintComponent ---> Swing
repaint(AWT) ---> update(background) ---> paint
repaint(Swing) ---> in paintComponent ---> super.paintComponent(background)

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What's the difference between paint and paintComponent?

can any body tell me the difference between paint and paintComponent?and when i should use paint and when use paintComponent?
I know that when I use repaint,it will clear all the objects and then paint again?
is there a method similar to repaint?
thanks in advance!

and when i should use paint and when use paintComponent?Simple answer:
a) override paint() when doing custom painting on an AWT component
b) override paintComponent() when doing custom painting on a Swing component
Detailed answer:
Read the article on [url http://java.sun.com/products/jfc/tsc/articles/painting/index.html]Painting in AWT and Swing.
Read the Swing tutorial on [url http://java.sun.com/docs/books/tutorial/uiswing/14painting/index.html]Custom Painting.

What is the difference between paint() and paintComponent()?

I always confuse by them?
Thanks

paintComponent is the method used by Swing components to do the painting necessary for the component. If you are making a custom Swing component, it is recommended that you override paintComponent instead of paint. Non-swing AWT components do not have a paintComponent method.
A Swing component's default paint() method partitions the painting of a component into separate phases, including painting the component itself, painting the component's border, and finally painting all its children. Overriding paintComponent in a custom Swing component only affects the drawing of the component itself without impacting these other phases of drawing.

Difference between paint() and paint() after resize

Hello,
I have an application where I am painting a plot on a JPanel inside a JInternalFrame.
If I just call JPanel.repaint everything gets painted in the correct position.
The problem comes when I am resizing the JPanel via the JInternalFrame. In that
case the paint code retrieves the bounds of the JPanel and plots only some of
the items in the wrong place. The errant positions indicate that the paint is retrieving
a JPanel bounds for some items that reflects one of the JPanel sizes before
resizing stops.
How can I ensure that my paint() code is only getting the size of the JPanel after
resizing has stopped?
Thanks for any info,
P

DrClap wrote:
You can't. Because no part of your application can tell when that happens.
Try it with some application that you're familiar with. Like the browser you're using right now. Grab one of the window edges and drag it to make the window
smaller. Now stop dragging, but don't lift your finger off the mouse button. See how the browser redisplays itself, even though resizing might not have stopped yet?
Good point.
I was under the impression that resize stopped when the mouse button was released.
But, now that you mention it, things are being redrawn while resize is happening.
Thanks
P

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.
<b>ALV is Application List viewer:-</b>
Sap provides a set of ALV (ABAP LIST VIEWER) function modules which can be put into use to embellish the output of a report. This set of ALV functions is used to enhance the readability and functionality of any report output. Cases arise in sap when the output of a report contains columns extending more than 255 characters in length.
In such cases, this set of ALV functions can help choose selected columns and arrange the different columns from a report output and also save different variants for report display. This is a very efficient tool for dynamically sorting and arranging the columns from a report output.
<b>TABLE CONTROL:-</b>
ABAP offers two mechanisms for displaying and using table data in a screen. These mechanisms are table controls and step loops. Table controls and step loops are types of screen tables you can add to a screen in the Screen Painter.
Rewards if useful.
Regards,
Shilpi

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.

What is the main difference between menu_exits and user_exits

what is the main difference between menu_exits and user_exits

Hi,
User Exits:
A user exit is a three character code that instructs the system to access a program during system processing.
SXX: S is for standard exits that are delivered by SAP. XX represents the 2-digit exit number.
UXX: U is for user exits that are defined by the user. XX represents the 2-digit exit number
Menu Exits:
Menu exits add items to the pulldown menus in standard SAP applications. You can use these menu items to call up your own screens or to trigger entire add-on applications.
SAP creates menu exits by defining special menu items in the Menu Painter. These special entries have function codes that begin with "+" (a plus sign). You specify the menu items text when activating the item in an add-on project.
Regards,
Priyanka.

What are differences between Java and C#

What are differences between Java and C#?
I was looking at C# and it looks very similar to java, does anyone have any input on what the primary differences are?

C# has ventricles, being a more modern, hip,and
stylin language.Yeah, but it can't use them properly unless youbolt
on an after-market turbo charger and paint some
go-faster stripes.
Java doesn't need ventricles, as the language is
built as a bifurcative scrobbidibbit from theground
up.
And here I thought you were smart.The ventricles add power on the backswing and keep
down the humpty-B count, and those stripes don't
really do much except to impress the PHBs. A
ventricle here and there wouldn't do Java anyharm.
Oh, I see.
I didn't realize you were concerned with humpty-B. So
I suppose you put 17 firewalls in front of your VM's
Jeffries tubes too huh? And measure productivity in
fleems per wonkle?
That may have worked back when you carved FORTRAN on
stone tablets, and then went to look for a nice young
lady to club and take home. But modern software
development techniques demand a focus on the
regressive thromboid paradigm, and ventricles only
get in the way when you're trying to calibrate that
against the latest fractal suppository data.At least I have actual experience in carving FORTRAN on stone tablets, so I know what I'm talking about. (The clubbing was the other way around but that's neither here nor there.) As for your regressive thromboid paradigm, regressive is exactly what it is. Progressive paradigms, whether thromboid or rhomboid, require ventriculation to achieve their maximum potential.
And I suppose if you're still using those Jeffries tubes in your VM, it's not surprising that it's humptied to the max. Try installing Apache Fallopian if you really want to dehumptify it, or Apache Eustachian for 64-bit VMs.

Difference between Null and null?

What is the difference between null and NULL?
When is each used?
Thanks,

veryConfused wrote:
There is a null in java, but no NULL. null means no value. However, when assigning value, the following is different:Although the empty String has no special role. Null means, the referential type is not assigned (doesn't refer) to a specific object. The empty String is just another object though, so seeing it or pointing it out as something special when it actually isn't at all (no more special than new Integer(0) or new Object[0]) just adds to the confusion.

Difference between GUI_UPLOAD and WS_UPLOAD

Hi,
Please make me clear about the difference between GUI_UPLOAD and WS_UPLOAD. In which cases we need to use these modules...??
Thanks,
Satish

I would suggest to always use the GUI_UPLOAD. I say this because this is the function module which is used in the GUI_UPLOAD method of the class CL_GUI_FRONTEND_SERVICES.   Really, you should probably use the class/method instead of the function module.
data: filename type string.
filename = p_file.
call method cl_gui_frontend_services=>gui_upload
         exporting
              filename                = filename
              filetype                = 'ASC'
         changing
              data_tab                = iflatf
         exceptions
              file_open_error         = 1
              file_read_error         = 2
              no_batch                = 3
              gui_refuse_filetransfer = 4
              no_authority            = 6
              unknown_error           = 7
              bad_data_format         = 8
              unknown_dp_error        = 12
              access_denied           = 13
              others                  = 17.
Regards,
Rich Heilman

Difference between char and varchar, also the difference between varchar2

Hi,
Can anyone explain me the difference between char and varchar, and also the difference between varchar and varchar2...

Varchar2 is variable width character data type, so if you define column with width 20 and insert only one character to tis column only, one character will be stored in database. Char is not variable width so when you define column with width 20 and insert one character to this column it will be right padded with 19 spaces to desired length, so you will store 20 characters in the dattabase (follow the example 1). Varchar data type from Oracle 9i is automaticlly promoted to varchar2 (follow example 2)
Example 1:
SQL> create table tchar(text1 char(10), text2 varchar2(10))
2 /
Table created.
SQL> insert into tchar values('krystian','krystian')
2 /
1 row created.
SQL> select text1, length(text1), text2, length(text2)
2 from tchar
3 /
TEXT1 LENGTH(TEXT1) TEXT2 LENGTH(TEXT2)
krystian 10 krystian 8
Example 2:
create table tvarchar(text varchar(10))
SQL> select table_name,column_name,data_type
2 from user_tab_columns
3 where table_name = 'TVARCHAR'
4 /
TABLE_NAME COLUMN_NAME DATA_TYPE
TVARCHAR TEXT VARCHAR2
Best Regards
Krystian Zieja / mob

The difference between Lion and Mountain Lion

Can some one explain to me the difference between Lion and Mtn Lion? I'm currently 10.6.8 Is it beneficiall for me to upgrade?

Mountain Lion is an enhanced version of previous OS X and so that is Mavericks.
About upgrading it all depends on what your needs are and if your hardware supports it.
System requirements for OS X Lion
System requirements for OS X Mountain Lion
OS X Mavericks: System Requirements
Please check also applications compatibility. From Lion onward, you cannot run PPC application.

The difference between N80 and N80IE ?

What is the difference between M80 and N80ie?

02-Jan-2007
07:45 PM
korngear wrote:
The Nokia N80 Internet Edition is a new version of this handset with the same hardware as the normal N80. It is due for release in Q4 of 2006 and will be available in Patina Bronze or Pearl Black, and has the following additional software included.
Yahoo Go! for Mobile
Flickr
Some Amazon Branded Software
'Download!' App management
Internet Telephone - SIP VOIP Frontend
WLAN Wizard
Gizmo VOIP - Gizmo Project VOIP Frontend.
\\en.wikipedia.org//
@Korngear
Thanks.
Could N80 be upgraded to N80IE?

The difference between SFP+ and X2

Dear Expert,
I need to know what is the difference between SFP+ and X2! and can I use SFP+ card and module instead of X2?
Thanks,
Mohammad Saeed

Hi,
They are both used for 10Gig interfaces. The difference is the connector type.
SFP+ is LC and X2 is SC.
You can not put an SFP+ into an X2 slot or X2 optic into a SFP+.
HTH

Difference between ok_code and sy-ucomm

Hi,
Can any one tell me the difference between ok_code and sy-ucomm

Hi,
Actually OK_CODE and SY-Ucomm are the same. But experts suggest use of OK code for following reason:
In each PAI event that a user triggers by choosing either a pushbutton on the screen or an element in a GUI status, the corresponding function code is placed into the system field SYST-UCOMM or SY-UCOMM and placed in the OK_CODE field (as long as the function code is not empty). Empty function codes are placed in neither the SY-UCOMM field nor the OK_CODE field.
In your ABAP programs, you should work with the OK_CODE field instead of SY-UCOMM. There are two reasons for this: Firstly, the ABAP program has full control over fields declared within it, and secondly, you should never change the value of an ABAP system field. However, you should also always initialize the OK_CODE field in an ABAP program for the following reason:
In the same way that the OK_CODE field in the ABAP program and the system field SY-UCOMM receive the contents of the corresponding screen fields in the PAI event, their contents are also assigned to the OK_CODE screen field and system field SYST-UCOMM in the PBO event. Therefore, you must clear the OK_CODE field in the ABAP program to ensure that the function code of a screen is not already filled in the PBO event with an unwanted value. This is particularly important when the next PAI event can be triggered with an empty function code (for example, using ENTER). Empty function codes do not affect SY-UCOMM or the OK_CODE field, and consequently, the old field contents are transported.

Difference between paint() and paintcomponent()

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