Differnce between using RandomAccessFile and Outputstream

Hi,
I'm implementing a download manager , i read some source using RandomAccessFile and the other using Outbutstream and buffedOutputstream
so any one can give me a quick summary between them and which is better ?

BigDaddyLoveHandles wrote:
sabre150 wrote:
BigDaddyLoveHandles wrote:
BigDaddyLoveHandles wrote:
It's useless to speculate about unseen code written by an unknown hand.That's my {color:green}Phrase Of The Day.{color}Interesting that I also used the word 'speculate' but my brain must be slower than yours since I was a minute behind you!Don't you know that on Fridays it's useless trying to keep up with me? I wear my Ninja outfit!:-) I'm surprised you can get one that fits!

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Differnce between AT NEW AND ON CHANGE OF

Hi,
Differnce between AT NEW AND ON CHANGE OF
Iam waiting foryour reply
Thanks & Regards
Raja Sekhar.T

Hai Raja
check the following Documents
1. AT NEW f.
2. AT END OF f.
3. AT FIRST.
4. AT LAST.
5. AT fg.
Effect
In a LOOP which processes a dataset created with EXTRACT , you can use special control structures for control break processing. All these structures begin with AT and end with ENDAT . The sequence of statements which lies between them is then executed if a control break occurs.
You can use these key words for control break processing with extract datasets only if the active LOOP statement is proceesing an extract dataset.
The control level structure with extract datasets is dynamic. It corresponds exactly to the sort key of the extract dataset, i.e. to the order of fields in the field group HEADER by which the extract dataset was sorted .
At the end of a control group ( AT END OF , AT LAST ), there are two types of control level information between AT and ENDAT :
If the sort key of the extract dataset contains a non-numeric field h (particularly in the field group HEADER ), the field CNT(h) contains the number of control breaks in the (subordinate) control level h .
For extracted number fields g (see also ABAP/4 number types ), the fields SUM(g) contain the relevant control totals.
Notes
The fields CNT(h) and SUM(g) can only be addressed after they have been sorted. Otherwise, a runtime error may occur.
The fields CNT(h) and SUM(g) are filled with the relevant values for a control level at the end of each control group ( AT END OF , AT LAST ), not at the beginning ( AT FIRST , AT NEW ).
When calculating totals with SUM(g) , the system automatically chooses the maximum field sizes so that an overflow occurs only if the absolute value area limits are exceeded.
You can also use special control break control structures with LOOP s on internal tables.
Variant 1
AT NEW f.
Variant 2
AT END OF f.
Effect
f is a field from the field group HEADER . The enclosed sequence of statements is executed if
the field f occurs in the sort key of the extract dataset (and thus also in the field group HEADER ) and
the field f or a superior sort criterion has a different value in the current LOOP line than in the prceding ( AT NEW ) or subsequent ( AT END OF ) record of the extract dataset.
Example
DATA: NAME(30),
      SALES TYPE I.
FIELD-GROUPS: HEADER, INFOS.
INSERT: NAME INTO HEADER,
        SALES INTO INFOS.
LOOP.
AT NEW NAME.
    NEW-PAGE.
ENDAT.
AT END OF NAME.
    WRITE: / NAME, SUM(SALES).
ENDAT.
ENDLOOP.
Notes
If the extract dataset is not sorted before processing with LOOP , no control level structure is defined and the statements following AT NEW or AT END OF are not executed.
Fields which stand at hex zero are ignored by the control break check with AT NEW or AT END OF . This corresponds to the behavior of the SORT statement, which always places unoccupied fields (i.e. fields which stand at hex zero) before all occupied fields when sorting extract datasets, regardless of whether the sort sequence is in ascending or descending order.
Variant 3
AT FIRST.
Variant 4
AT LAST.
Effect
Executes the relevant series of statements just once - either on the first loop pass (with AT FIRST ) or on the last loop pass (with AT LAST ).
Variant 5
AT fg.
Addition
... WITH fg1
Effect
This statement makes single record processing dependent on the type of extracted record.
The sequence of statements following AT fg are executed whenever the current LOOP record is created with EXTRACT fg (in other words: when the current record is a fg record).
Addition
... WITH fg1
Effect
Executes the sequence of statements belonging to AT fg WITH fg1 only if the record of the field group fg in the dataset is immediately followed by a record of the field group fg1 .
Basic form
ON CHANGE OF f.
Addition
... OR f1
Effect
Executes the processing block enclosed by the " ON CHANGE OF f " and " ENDON " statements whenever the contents of the field f change (control break processing).
Normally, you use the statement to manipulate database fields during GET events or SELECT / ENDSELECT processing.
Note
There are special control structures for processing control breaks in LOOP s on internal tables or extract datasets AT ).
ON CHANGE OF is unsuitable for recognizing control levels in loops of this type because it always creates a global auxiliary field which is used to check for changes. This global auxiliary field can only be changed in the relevant ON CHANGE OF statement. It is not reset when the processing goes into loops or subroutines, so unwanted effects can occur if the loop or subroutine is executed again. Also, since it is set to its initial value when created (like any other field), any ON CHANGE OF processing will be executed after the first test, unless the contents of the field concerned happen to be identical to the initial value.
Example
TABLES T100.
SELECT * FROM T100 WHERE SPRSL = SY-LANGU AND
                         MSGNR < '010'
                   ORDER BY PRIMARY KEY.
ON CHANGE OF T100-ARBGB.
    ULINE.
    WRITE: / '**', T100-ARBGB, '**'.
ENDON.
WRITE: / T100-MSGNR, T100-TEXT.
ENDSELECT.
Displays all messages with their numbers in the logon language, provided the number is less than '010'.
Each time the message class changes, it is output.
Addition
... OR f1
Effect
Also executes the code whenever the contents of the field f1 changes.
You can use this addition several times.
Example
Logical database F1S
TABLES: SPFLI, SFLIGHT, SBOOK.
GET SBOOK.
ON CHANGE OF SPFLI-CARRID   OR
               SPFLI-CONNID   OR
               SFLIGHT-FLDATE.
    ULINE.
    WRITE: /5 SPFLI-CARRID, SPFLI-CONNID,
            5 SFLIGHT-FLDATE, SPFLI-FLTIME,
            5 SFLIGHT-SEATSMAX, SFLIGHT-SEATSOCC.
ENDON.
WRITE: / SBOOK-CUSTOMID.
The code between ON CHANGE OF and ENDON is executed only if at least one of the fields SPFLI-CARRID , SPFLI-CONNID or SFLIGHT-FLDATE has changed, i.e. there is a different flight connection (which also has bookings).
Notes
Thanks & regards
Sreenivasulu P

Differnce between type f and type p?

Hi All,
What is the Differnce between type f and type p?
Regard,
Mike

Hi Mike
Differnce bw type F and type P:-
Packed numbers - type P
Type P data allows digits after the decimal point. The number of decimal places is generic, and is determined in the program. The value range of type P data depends on its size and the number of digits after the decimal point. The valid size can be any value from 1 to 16 bytes. Two decimal digits are packed into one byte, while the last byte contains one digit and the sign. Up to 14 digits are allowed after the decimal point. The initial value is zero. When working with type P data, it is a good idea to set the program attribute Fixed point arithmetic.Otherwise, type P numbers are treated as integers.
You can use type P data for such values as distances, weights, amounts of money, and so on.
Floating point numbers - type F
The value range of type F numbers is 1x10*-307 to 1x10*308 for positive and negative numbers, including 0 (zero). The accuracy range is approximately 15 decimals, depending on the floating point arithmetic of the hardware platform. Since type F data is internally converted to a binary system, rounding errors can occur. Although the ABAP processor tries to minimize these effects, you should not use type F data if high accuracy is required. Instead, use type P data.
You use type F fields when you need to cope with very large value ranges and rounding errors are not critical.
Using I and F fields for calculations is quicker than using P fields. Arithmetic operations using I and F fields are very similar to the actual machine code operations, while P fields require more support from the software. Nevertheless, you have to use type P data to meet accuracy or value range requirements.
C ---> character
D ---> date
P ---> packed
T ---> time
X ---> hexadecimal
I ---> integer.
N ---> Muneric.
Reward pts if help.
Regards
Deepanker

Differnce between byte[] reading and int[] reading

While reading information from file using fileInputStream ....
Is there any differnce between byte[] reading and int[] reading ?

Well, in as much as you can do the former and not the latter.
FileInputStream just reads blocks of bytes. If you want to read more sophisticated element you need to wrap in in a DataInputStream or a Reader.

Differnce between SAP-XI and SAP PI

hi can any body tell me what is the differnce between SAP-XI and SAP-PI

Hi vijay,
u can get lot of information regarding PI and XI in sdn.There already exists a no. of thread.just search with keyword "XI 3.0 and PI 7.0" u can get a lot.
XI 3.0
1. J2Se adapter engine was replaced with J2EE Adapter Engine.
2. BPM was available from XI 3.0
3. Part of Netweaver 2004
PI 7.0
1XI renames as Process Integration
2.. Part of Netweaver 2004s.
3. Has all features of XI 3.0 and every SP of Pi 7.0 has a corresponding release for XI 3.0.
4. Runs on WAS 7.0 and has same features as XI 3,0
From functional point, there is no difference between XI3.0 and PI7.0. There are changes only wrt SP. For every SP release on PI7.0 a corresponding SP for XI3.0 is also released.
A comparision of the service packs in 2004 and 2004s;
in 2004 - in 2004s
SP12 & < - SP04
SP13 + 14 - SP05
SP15 - SP06
SP16 - SP07
SP17 - SP08
SP18 - SP09
For release notes
ref:http://help.sap.com/saphelp_nw04/helpdata/en/cf/9844428e9cbe30e10000000a155106/frameset.htm
There is no f'nal difference between XI 3.0 and PI 7.0. In order to bring all netweaver releases on par with each other , SAP released / renamed XI as PI and it is a part of NW04s
For every release of PI 7.0, there is a parallel Support Pack on XI.
<a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/706005a3-3bd6-2910-91ae-a2016239bdcf">SAP NetWeaver Process Integration 7.1 Overview of New Capabilities</a>
Also check these threads.
Difference between NetWeaver 2004 and NetWeaver 7.0 or 7.1
All the diff between XI 3.0 and PI 7.0
differences between xi 3.0 and pi 7.0
Difference/ changes from XI 3.0 to PI 7.0
regards
Bill

Differnce between business name and physical name

What is the differnce between business name and physical name in OWB

Hi Vibhuti,
What I have noticed is that Physical name is THE important thing that is required while importing and synchronising. It has a length limitation of 30. The mappings appear with this name in the left panel in design center. The Business name is just for reference I believe.
Cheers,
Swagata

What is the differnce between Blue,Purple and Orange Audio Tracks. Can you convert either to Green Midi Track?

What is the differnce between Blue,Purple and Orange Audio Tracks. Can you convert either to Green Midi Track?

Are you asking about Garageband? Your signature also mentions Logic, but I have never worked with that.
Concerning Garageband:
Real Instrument regions from your recordings are purple.
Real Instrument regions from Apple Loops are blue.
Regions from imported audio files are orange.
Software Instrument regions from recordings, loops, and imported MIDI files are green.
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Differnce between DB Backup and generate Script

whats the differnce between DB Backup and generating Script of a database.
Please mention the main diffrence as we know while genearating script we can select tables/procedures of our choice instead of having all while in backup it takes full tables and procedures.

Hi Abhishek,
In addition to others’ posts, we need to know that there are different types of
backup in SQL Server, such as full backup, differential backup, log back up, file backup and so on. It is recommended to back up database on a regular basis, as a well-planned backup
and restore strategy helps protect databases against data loss caused by a variety of failures. You can make
maintenance plans to back up database automatically.
However, generating scripts is not a disaster recovery option. If you encounter some failures about database, you cannot get data back by generating scripts.
Thanks,
Lydia Zhang

Whats the differnce between a7 chip and m7 chip

iPhone 5s, whats the differnce between a7 chip and m7 chip?

For more details on M7 you can read http://en.wikipedia.org/wiki/Apple_M7
Allan

Difference between using Binding and Value Attribute

what is the deference between using binding and value attribute, when I use binding attribute at the time of Value change listener is behaving like action listener,
Ex:
If I use value attribute, at the time of value change listener the component is not showing the result in the component but when I use Binding attribute it is happening automatically. So I want to know how the binding attribute is working.
I know, at the time of binding attribute the component is creating an instance at the bean side, So even also how it is following the life cycle of the JSF Frame work, and also Please suggest me weather which one is better to use either Binding or Value?

JNaveen wrote:
If I use value attribute, at the time of value change listener the component is not showing the result in the component but when I use Binding attribute it is happening automatically. So I want to know how the binding attribute is working.You need to learn about the JSF lifecycle. The ValueChangeEvent is invoked after conversion and validation in the 3rd phase, while the model values are updated in the 4th phase. In the valueChangeListener method you normally use ValueChangeEvent#getNewValue() to get the new value after the change.
I know, at the time of binding attribute the component is creating an instance at the bean side, So even also how it is following the life cycle of the JSF Frame work, and also Please suggest me weather which one is better to use either Binding or Value?Use the 'value' attribute to bind the value to the bean. Use the 'binding' attribute to bind the component to the bean. If you don't need to precreate the component or do other things than getting/setting its value, then there is no need for the 'binding' attribute.
Read on those links if you want to know something more about the JSF lifecycle:
[http://balusc.blogspot.com/2006/09/debug-jsf-lifecycle.html].
[http://jcp.org/aboutJava/communityprocess/final/jsr252/index.html] (pick 1st download).

Difference between using Java and Non-Java in Webi.

Hi ,
I have one more question requesting for an answer.
Would like to know what is the Difference between using Java and Non-Java in Webi.
Thank You in advance.
Appana Ganesh.

Hi,
check the Information in following post, the differences are discussed there:
http://scn.sap.com/thread/3295306
best regards,
Victor

Difference Between Using MVC And SwingUtilities For GUI Component Update

Hi Guys,
What are the difference of using the MVC (Model View Controler) pattern to update GUI and using the SwingUtilities of doing the same job?
Are there any big differences or shortcomings of any?
Thanks.

kap wrote:
Hi Guys,
What are the difference of using the MVC (Model View Controler) pattern to update GUI and using the SwingUtilities of doing the same job?
Are there any big differences or shortcomings of any?
Thanks.Your question is akin to asking, "What's the difference between using a car to get somewhere versus stepping on the gas pedal to do the same job?"
The use of SwingUtilities to update the "view" only pertains to updating components in a thread-safe manner, it has nothing to do with MVC. MVC would govern when the view gets updated (i.e. after the model changes), while SwingUtilties would be used to specify how the view gets updated.

Differnce Between Oracle 9i And MS SQL Server 2000

Hi,
What are the difference between Oracle 9i And MS SQL Server 2000.
Thnaks

Some links
http://www.google.lv/search?hl=lv&q=oracle+sql+server+difference&meta=
http://asktom.oracle.com/pls/asktom/f?p=100:1:487512552646613::NO:RP::
http://www.mssqlcity.com/Articles/Compare/sql_server_vs_oracle.htm
http://www.wisdomforce.com/dweb/resources/docs/MSSQL2005_ORACLE10g_compare.pdf
But you have to remember one big thing - I've not seen yet one compare that was completely indifferent to any of the included DB's. So you can be sure that every doc that you get on MS website will say that SQL server is better, every doc on Oracle website will say that Oracle is better. Every doc on other websites will say that better DB either is:
1) DB that has payed for the reserach paper
2) DB that was mostly used by the researchers
So of course you should be very cautious about each paper you get.
Gints Plivna
http://www.gplivna.eu

Difference between using FM and class in alv

does anyone know what's the main difference between using FM to create alv and using class to create alv?
in what condition we usually use FM or class?

using FM we can create Classical and Interactive ALV Reports.
The classes are used to create the ALV Reports with OOPS concept.
Check this for basic concepts of OOPS
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/b6cae890-0201-0010-ef8b-f970a9c41d47
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/1591ec90-0201-0010-3ba8-cdcd500b17cf
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webas/abap/abap%20code%20samples/alv%20grid/abap%20code%20sample%20to%20display%20data%20in%20alv%20grid%20using%20object%20oriented%20programming.doc
Tabstrip
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/022ba607-0301-0010-e382-fdedca553f5f
Editable ALV
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/ec31e990-0201-0010-f4b6-c02d876ce033
Tree
http://www.sapdevelopment.co.uk/reporting/alv/alvtree/alvtree_usrint.htm
General Tutorial for OOPS
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/e8a1d690-0201-0010-b7ad-d9719a415907
Reward Points if useful

What is different between using Scriptlet and VBA

Did any know what is different between using "Insert test Scriptlet" and VBA (on Cusom Page Programmability node)?

It?s really the environment used. Scriptlets are Microsoft VB Script which is a loose scripting environment with no variable declarations, no intellisence, microhelp, etc. VBA is actually the full VB6 for applications language environment that provides a very helpful integrated development environment, variable declorations, library references, intellisence and more. VB Script generally uses less system resources, but with powerful hardware today we find that VBA meets all our needs. VBA Also easily allows the use of global modules and class files.

Differnce between using RandomAccessFile and Outputstream

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