What is marker Interface
hi
what is marker interface
what is the use of it
plz give me reply
bye
Marker interface is an interface without any method.
Eg : Serializable
refer this link
http://forum.java.sun.com/thread.jspa?threadID=597388&messageID=3787740
Similar Messages
-
What is the significance of Marker interface? Why are we using, even though
What is the significance of Marker interface? Why are we using, even though it has no method?
Well, what's the significance of an interface? They can define a set of methods a class may implement but the class could equally well implement these methods without the interface so why having interfaces at all?
The answer is that the most important aspect of an interface is that it constitutes a type (you can declare variables of it). And it's a type regardless of how many methods it defines, including none. So the reason for having a marker interface is that you're interested solely in the type aspect of interfaces. -
What is the use of Marker Interfaces?
What is the use of marker interfaces?
As it is not having any methods or fileds what is the benefit I will get by implementing those interfaces?
Servlet implements SingleThread
What it will do behind the scenes exactly as singleThread model is marker interfaceThe use of marker interfaces is to act as markers (shock horror)
It is quite a common way to tell a program what a class can/can't do: Cloneable, Serializable etc etc
This doesn't change the functionality of the class itself, but is more an indication as to what can be done with this class.
In this case the servlet container can then tell whether or not it implements the interface, and can treat it accordingly. Implementing this interface tells the container you want it to run this servlet in singleThreaded mode.
Thats all there is to it.
It would be along the lines of
Servlet servlet = loadServlet("...")
if (servlet instanceof SingleThreadModel){
// Single threaded servlet - start new process for it
else {
// regular servlet - reuse existing object. -
can any bdy plz tell me what is the use of marker interface ????
Please search the forums before asking such a common question.
-
What is Markable Interface in JAVA
What is Markable Interface in JAVA need explanation
Markable interface in one which does not contain any
method or member declaration.
Eg: Serializable, Observable etc...terminology aside, I don't think "not containing any methods" is enough to call something a marker interface. is EventListener a marker interface? I don't think so, I think of it as a supertype for all other event listeners in the JDK -
hello i madhav new to this forum , i have doubt on marker interface . as it doesnot have any body why we r using that one instead of skipping.Is there any concept behind is there.More about my doubt is Take Example Cloneable Interface it Doesn't Have any Method In it,Clone() method is from Object class,then what is the necessity of implementing the interface .Why it should not be like that.
what is real technolgy behind MarkerInteface and Why we r going to be used in what situations it will needed.And Lastly is there any method related to Serailizable interface if not what it do .
marker interface can also called as Tag interface what is tag mean here just saying combing derived classes . i didn't get that one and how it will be .
if u could explain with example or real time project it would be better for me
thanks in advanceWhat is a "marker" interface?
Marker Interface pattern
c2.com - Marker Interface
experts.about.com - Marker Interfaces
The Purpose of the Marker Interface
Maximize your Design ROI with Marker Interfaces and JavaDoc -
what is the use of marker interface ?
serializable ,clonable ,Runnable interfaces are marker interfaces .
when any of the classes implemets these interfaces that classes will get the properities of marker interfaces .
But , what r those properties?
what is happening in back ground when we implements these marker interfaces ?what is the use of marker interface ?Let me ask a quesiton to you first: what is the use of a forum search?
serializable ,clonable ,Runnable interfaces are
marker interfaces .Not Runnable.
when any of the classes implemets these interfaces
that classes will get the properities of marker
interfaces .If you mean by "implementing" only that it'll be included in the implements declaration: you're wrong. You also make sure that your class complies with the restrictions/behaviour imposed.
what is happening in back ground when we implements
these marker interfaces ?Nothing. -
what is the use of marker interfaces when do not specify any methods?
This is discussed about once every week or every other week on this site. I suggest that you search this site for those previous discussions. They will have all you need. Also, have a look at google and wikipedia:
http://en.wikipedia.org/wiki/Marker_interface_pattern -
what is the use of marker interfaces and y do we need them
Here's an example I'm using:
I've got a program which displays lots of tables, it doesn't just display them, it prints them and it dumps them to Excell files.
Many of these tables have a total row at the bottom which needs highlighting. I flag the TableModel with a marker interface of my own. Then the various ways that table data is handled, when passed the TableModel, know to use a modifled JTable, or to use special formating flags on the last row. -
Failed to get DHCP response on interface "Marking interface dirty"
Dears
i have WLC 5508 showing the below Logs , which prevent the users from connecting to the SSIDs , also its disconnecting the associted users
DHCP Socket Task: Jul 11 09:54:08.992: %SIM-3-DHCP_SERVER_NO_REPLY: sim_interface.c:1039 Failed to get DHCP response on interface 'interface-02'. Marking interface dirty.
*mmListen: Jul 11 09:54:08.638: %MM-3-INVALID_PKT_RECVD: mm_listen.c:7671 Received an invalid packet from 10.21.1.25. Source member:0.0.0.0. source member unknown.
it shows 3 to 4 times durring 1 hour ,
any idea about the problem , and what exactly Dirty interface means ??looks like you could be using interface group.
(WLC) >show interface group detailed
Interface marked with * indicates DHCP dirty interface.
whenever the existing interface goes dirty does the client tries the next available interface for dhcp.
The idea of Interface Groups is that you can have a WLAN utilize multiple interfaces/VLANs/Subnets/DHCP Pools, either for load balancing. At its heart it is purely round robin or based on hash generated using mac address(it depends on the wlc code), but should a client connect in on a certain interface and not be able to complete the DHCP process we mark it as dirty for 30 minutes. During those 30 minutes we basically remove that Interface from the Interface Group as it won't be selected for use. -
Is Externalizable is a marker interface???
hey,
What is a marker interface??? it should not have any methods, isn't it???then why is that the interface externalizable called as a marker ???
can anybody tell me the reason??What is a marker interface??? An interface that marks objects that have a certain, usually non-enforcible behaviour. Like Serializable marks objects that are supposed to be defined in a way that they can be serielaized, i.e. no non-transient, non-serializable members.
it should not have any
methods, isn't it???It often doesn't, but I don't see why that's a necessity.
then why is that the interface
externalizable called as a marker ???
can anybody tell me the reason??See above, who said it's not allowed to? -
Hi,
The Marker Interface is interface with no body(it serve only as a Tag) . So what is thew use of it.Can we write our own Marker Interface?if yes how?
How does a clone method knows that the calling object implements Clonable?Is this hard coded in the compiler or JVM ?
Thanks
BipulThe Marker Interface is interface with no body(it
serve only as a Tag) . So what is thew use of it.To mark that a certain class's implementation includes the necessary precautions for objects of that cass to be safely cloned/serialized/whatevered...
Can
we write our own Marker Interface?if yes how?As you noticed: simply write an interface without methods. Duh...
How does a clone method knows that the calling object
implements Clonable?Is this hard coded in the
compiler or JVM ?instanceof -
Hai Friends
I want to know what is use of marker interface in java(JSF) and also how it is working without having even single method declaration & definitions inside that interfece like Remote interface,serialization and so on.
Thanks
Selvakumar .kMarker Interfaces work the same way as they do anywhere else. Please read about marker interfaces.
-
How to find out what are the interfaces used for Job and Job Codes
HI All,
I just wanted to know how do we find out what are the interfaces used for Job and Job codes .
Thanks In Advance
SunnyHi,
Here is an idea for your request.
Basically you can create a simple query on multiprovider 0TCT_MC01.
Filter: you can use a variable for restriction of time ( calday, or calmonth) since you should be interested for a time period.
Choose following characters into your objects:
InfoProvider ( 0TCTIFPROV ) - you can create a variable for choosing infoprovider before query runs.
*Tp.[Type of BI Application Object] 0TCTBISOTYP = filter this with 'QUERY' or whatever your need is.
*BI Application Object 0TCTBISBOBJ, ( this will give you the name of the queries)
In key figures choose, Count for BI Appl. (0TCTWTCOUNT).
(number for query run)
Create a condition , for top 20.
Hope this helps.
Derya -
What are the Interfaces in ABAP
Hi all,
What are the Interfaces in ABAP ?
send me any material on the sameDear
Interface are basically used to upload large amt of data in SAP .
Intrfaces are Automation of BDCS..
Search for BDC'S IN FORUM u will get lots of material on same
Rgds
Santo
Maybe you are looking for
-
Hi all, Is Hyperion and Obiee a open source? What is the advantage of using Obiee reports instead of hyperion reports? Thanks
-
Please advise
-
hi, I tried to install OBIEE 11g but I have a problem in step 13/13 Creation domain failed, is that Oracle 11g database is required? or 10g is enough?. thank you
-
Lumia 800 - How do I turn off the annoying tone th...
I have played around with settings in "ringtones and sounds" but can't turn it off... my colleagues are getting annoyed now! Solved! Go to Solution.
-
Adobe Acrobat Pro 8 Download E-license Issue
I have installed Adobe Acrobat Pro 8. I have entered the serial number but when it tries to activate it cannot download the E-license. There is nothing in place in relation to Firewall/Proxy settings that is blocking access to the server. How can thi