Class extends two interface which have method in common name
A class implements two interfaces. Those interfaces have method in common name.
For ex;
public interface b{public void hello();}
public interface c{public void hello();}
public class a implements b,c
public void hello(){}
Since two interfaces have common method, How to differentiate in this case ?
How to differentiate what? You have to provide a method called hello(), just as in your example. (Normally you would have code in the method body, but zero lines of code is not against the rules.)
Similar Messages
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Class implementing two interfaces with same methods
interface Foo {
public void execute();
interface Bar {
public void execute();
class Dam implements Foo, Bar {
public void execute() {
//Which interface's execute method is being called here?
How do I make the Damn class have different implemenations for the execute method of the Foo and the Bar interfaces?hi,
//Which interface's execute method is being calledinterfaces' method are neither called to be executed by the JVM because they're not concrete implementation but only signature declaration.
How do I make the Damn class have different
implemenations for the execute method of the Foo and
the Bar interfaces?this can't be done if the signatures are the same, but if they're not, for instance
public void execute( int i )
public void execute( String s )
then you can have two implementation...anyway, what's the point if the signature are the same ? if you really want them to do different things why wouldn't you name them differently ?
raphaele -
Error while extending two interfaces.
I am using Weblogic Integration 8.5. When an interface extends two interfaces. Out of which one has a clone method declared. <br>
This IDE is giving error as <br>
ERROR: Sample.java:3: This type inherits two versions of method java.lang.Object clone(), one from java.lang.Object and another from com.ParentOne, that have conflicting access restrictions. <br>
<b>Following are code snippets.</b><br>
public interface Sample extends ParentOne, ParentTwo {} <br>
public interface ParentOne { <br>
public Object clone() throws CloneNotSupportedException; <br>} <br>public interface ParentTwo {} <br>
<b>Same is working fine in other IDE with the bea JDK as well as sun's jdk. </b>
<br>
Can anyone help on this? Many Thanks.I am using Weblogic Integration 8.5. When an interface extends two interfaces. Out of which one has a clone method declared. <br>
This IDE is giving error as <br>
ERROR: Sample.java:3: This type inherits two versions of method java.lang.Object clone(), one from java.lang.Object and another from com.ParentOne, that have conflicting access restrictions. <br>
<b>Following are code snippets.</b><br>
public interface Sample extends ParentOne, ParentTwo {} <br>
public interface ParentOne { <br>
public Object clone() throws CloneNotSupportedException; <br>} <br>public interface ParentTwo {} <br>
<b>Same is working fine in other IDE with the bea JDK as well as sun's jdk. </b>
<br>
Can anyone help on this? Many Thanks. -
When to use abstract classes instead of interfaces with extension methods in C#?
"Abstract class" and "interface" are similar concepts, with interface being the more abstract of the two. One differentiating factor is that abstract classes provide method implementations for derived classes when needed. In C#, however,
this differentiating factor has been reduced by the recent introduction of extension methods, which enable implementations to be provided for interface methods. Another differentiating factor is that a class can inherit only one abstract class (i.e., there
is no multiple inheritance), but it can implement multiple interfaces. This makes interfaces less restrictive and more flexible. So, in C#, when should we use abstract classes
instead of interfaces with extension methods?
A notable example of the interface + extension method model is LINQ, where query functionality is provided for any type that implements IEnumerable via
a multitude of extension methods.Hi
Well I believe Interfaces have more uses in software design. You could decouple your component implementing against interfaces so that
you have more flexibility on changing your code with less risk. Like Inversion of Control patterns where you can use interfaces and then when you decide you can change the concrete implementation that you want to use. Or other uses for interfaces is you could
use Interceptors using interfaces (Unity
Interceptor) to do different things where not all of these is feasible or at least as straightforward using abstract classes.
Regards
Aram -
I worked with files in LR that were originally on my C drive, then were moved to an external HD for storage. I now want to do some more work on those files (which have the same file name as on the C drive). I plugged the drive into my computer and it shows in LR under folders as the F drive and the little green light is on, but LR is showing only the first 6 files and not the remaining 200 or so. How do I expand the F folder to expose all files?
I worked with files in LR that were originally on my C drive, then were moved to an external HD for storage. I now want to do some more work on those files (which have the same file name as on the C drive). I plugged the drive into my computer and it shows in LR under folders as the F drive and the little green light is on, but LR is showing only the first 6 files and not the remaining 200 or so. How do I expand the F folder to expose all files?
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[b]Two Interfaces with same method signature[/b]
Hi,
I am having 2 interfaces which does have same method signature and
return type. In such case a class that implements these intefaces and overide
the method . In such case which method will execute . The method of class A or
class B otherwise one will be ignored by the JVM and other will be executed or
not???
For eg,
interface A
public void getData();
interface B
public void getData();
class InterfaceTest implements A,B
public void getData()
System.out.println("Inside the getData()");
public static void main(String args[])
InterfaceTest interTest=new InterfaceTest();
interTest.getData(); // Which method will execute Class A or B.
Please do provide an answer for this. I will be waiting for ur reply...
Thanks,
M.Ananthuthere is but one implementation, so why bother ?
what's more, you're talking about "class A" and "class B" when you defined A and B as interfaces
seems blurry in your mind... -
Delete masterdata from two infoobjects which have each other as attribut
Hello,
we have the infoobject 0BPARTNER und 0CUSTOMER which have each other within as an attribut.
0BPARTNER
Attribute 0CUSTOMER
0CUSTOMER
Attribute 0BPARTNER
Now we want to delete the master data from both of them. But it's not possible the delete in RSA1because of the assignment to each other.
Can you help me?
Best regards
StefanHi Stefan:
Do you want to delete ALL the Master Data records from the 2 InfoObjects? In case you need to do this on your DEVELOPMENT environment, then you could use Tcode SE14 to delete the CONTENTS from the SID table, Master Data Table, etc., please be aware that you need to use Tcode SE14 very carefully, because you could also delete the physical tables and not only the contents.
*Important: Also note that it is not recommended to use SE14 on your PRODUCTION environment, unless you perfectly understand the implications (you would need to reload your DSOs or Cubes).
Regards,
Francisco Milán.
Edited by: Francisco Milan on Jun 15, 2010 10:48 AM -
Class extending a Frame with main method in it - how do I use the methods?
Howdy.
Having a problem.. I want my "main" class, ie. the class with the main method in it to extend a Frame class.. because the main method is static, I can't use Frame's methods.
What's a trick to get around this ? I am making a deliberate design decision to extend the Frame class, because I thought it was.. well.. better. I could always just create a Frame object and utilise it.. but from little things I've read and seen it's better to extend it.
When I use Forte to make a Frame program it sets up a constructor/etc. for the main class and then it does something akin to this (the class is called MazeGenerator) :
public static void main(String args[]) {
new MazeGenerator().show();
What does "new MazeGenerator().show();" do when it's not being associated to an object handle ??
Ta.
- Scutt.Create an instance of the frame in main then the constructor can control it. Or you could add an init method or something:
class MyFrame extends Frame {
public static void main (String [] args) {
MyFrame frame = new MyFrame();
frame.init();
You don't necessarily have to have a reference to an Object in order to create one. All the work can be done in the constructor (something I'm not really fond of however) -
My phone doesn't have any cellular phone functions...but it CAN send text messages and access data. Has this happened to anyone else? I've gone through three Samsung Galaxy S5's in the past three days, the last two have this problem and the first stopped working all together. I've had new sim cards put in, ive done hard resets on the phone, i've rebooted the phone, done battery pulls, and tech support has reset the signal to my phone. Nothing has worked. (I just "upgraded" <- lol.... and my old phone IS turned off.)
Im in 79707. So to recap my whole case: I upgraded my device using the verizon wireless website. I received my phone and switched my old SIM card from my Droid Razr Maxx HD into the new Galaxy S5. Everything worked fine until the next morning (May 31st) when I woke up and the phone wouldn't turn on. I took the phone to the local Verizon store and they were also unable to turn it on. They issued me a new Galaxy S5 (referred to as phone 2) and switched my SIM card into that one.
With PHONE 2 i was able to make calls and receive calls, along with text and data for approximately four hours. After that, i was unable to use the phone function of the device, but text and data were still functioning. I took PHONE 2 back to the Verizon store where they attempted to hard reset the phone twice, they also installed two new SIM cards at the store. After this they would get the same error, which is the phone just reading "Dialing..." after attempting to make a call. The Verizon associate declared the phone "DOA" and issued me another Galaxy S5 (referred to as PHONE 3).
PHONE 3 worked well, with phone text and data featured intact from when I received it on the after noon of the 31st until approximately 2:30PM on June 1st. I contacted Verizon Tech Support via Gmail phone to attempt the correct the problem. They reset the connection, had me do a battery pull, had me close the "phone" application, and erase the data and catche, then restart the phone. All of which had no effect. My phone is still able to receive texts and use data (even with wifi off) it simply cannot make or take phone calls. all it says is "dialing..." when I attempt to make a call. When other phones call my device it rings once on their end and directs them to voicemail, PHONE 3 does not ring on my end.
I have made sure my old phone is completely powered down. -
How to connect the two field which have a diffrent length
Hi,
i have two table one is VBRP-VGBEL CHAR 10
second is MKPF-XBLNR CHAR 16
both are same data means vgbel eq xblnr.
how to connect these table because when i connect these table it gives me error
have a same type and length.
please give me reply soon . Thanks.
dineshHI
I GOT THE SAME PROBLEM AT THAT TIME I DONE LIKE THIS
I THINK IT MAY HELPFULL FOR YOU
OBJID = 6 CHAR
SOBID = 40 CHAR
I GOT THE SAME ERROR WHAT YOU GET
I NEED ONLY 6 CHAT SO THAT WHY I HAD WROTE THIS LOGIC
1ST I HAD DECLARED THE SAME STRUCTURE TWICE
IN FIRST ONE IT IS NORMAL DECLARATION
IN SECOND ONE I HAD DECLARED THAT 2 FIELDS AS THE SAME LENGTH
I HAD PUT THAT IN THA BOLD LETTERS
AND AFTER THAT I HAD LOOPES THAT WORK AREA AND CONVERTED THAT SZE
REWARD IF USEFULL
TYPES : BEGIN OF ST_HRP1001,
OTYPE TYPE HRP1001-OTYPE,
<b>OBJID TYPE HRP1001-OBJID</b>,
RELAT type hrp1001-RELAT,
BEGDA TYPE HRP1001-BEGDA,
ENDDA TYPE HRP1001-ENDDA,
SCLAS TYPE HRP1001-SCLAS,
<b>SOBID TYPE HRP1001-SOBID,</b>
END OF ST_HRP1001.
TYPES : BEGIN OF ST_SOBID,
OTYPE TYPE HRP1001-OTYPE,
<b>OBJID TYPE HRP1001-OBJID,</b>
RELAT type hrp1001-OBJID,
BEGDA TYPE HRP1001-BEGDA,
ENDDA TYPE HRP1001-ENDDA,
SCLAS TYPE HRP1001-SCLAS,
<b>SOBID TYPE HRP1001-OBJID,</b>
END OF ST_SOBID.
SELECT OTYPE
OBJID
RELAT
BEGDA
ENDDA
SCLAS
SOBID FROM HRP1001 INTO TABLE IT_HRP1001
WHERE OTYPE = 'D'
AND OBJID IN S_OBJID
AND BEGDA GE DATE-LOW
AND ENDDA LE DATE-HIGH
AND ( SCLAS = 'E' OR SCLAS = 'ET' ).
IF SY-SUBRC NE 0.
MESSAGE 'NO RECORD FOUND FOR THE GIVEN SELECTION CRITERIA ' TYPE 'E'.
ENDIF.
LOOPING TO CONVERT THAT FIELD LENGHT
<b> LOOP AT IT_HRP1001 INTO WA_HRP1001.
WA_SOBID-OTYPE = WA_HRP1001-OTYPE.
WA_SOBID-OBJID = WA_HRP1001-OBJID.
WA_SOBID-RELAT = WA_HRP1001-RELAT.
WA_SOBID-BEGDA = WA_HRP1001-BEGDA.
WA_SOBID-ENDDA = WA_HRP1001-ENDDA.
WA_SOBID-SCLAS = WA_HRP1001-SCLAS.
WA_SOBID-SOBID = WA_HRP1001-SOBID.
APPEND WA_SOBID TO IT_SOBID.
ENDLOOP.</b>
SELECT OTYPE
OBJID
AEDTM
UNAME
DELET
CANCR
NCONT
FROM HRP1026
INTO TABLE IT_HRP1026
FOR ALL ENTRIES IN IT_SOBID
WHERE OBJID = IT_SOBID-SOBID
AND ( OTYPE = 'E' OR OTYPE = 'ET' )
AND DELET = 'X' AND
BEGDA GE DATE-LOW AND
ENDDA LE DATE-HIGH. -
How to find different rows in two tables which have same schema.
There are two tables t1 and t2, they have same schema. Table t1 includes the informtion of students last month,table t2 incude the information of the students this month. I want to find the difference of the same student between two months. What should I do and How to do?
Look a the following example:
Table TEST_1 TEST_2
ID ID_TX ID ID_TX
1 a 1 a
2 b 2 b
4 d 4 d
6 f 6 f
7 g 7 g
10 j 10 j
10 Z 10 x --- DIFFERENT
12 x --- DIFFERENT
20 x ---- DIFFERENT
Query:
Select * FROM
( (SELECT '1', ID, ID_TXT FROM TEST_1 MINUS SELECT '1', ID, ID_TXT FROM TEST_2)
UNION
(SELECT '2', ID, ID_TXT FROM TEST_2 MINUS SELECT '2', ID, ID_TXT FROM TEST_1) )
Order By ID
RESULTS:
' ID ID_TXT
1 10 Z
2 10 x
1 12 x
2 20 x -
How to access records from two tables which have no relation
Hi,
I trying to generate a report where i need to print the company details at the top of the page and invoice details of that down the page.There is no relation between these two tables.I am not able to write two queries for one report.Pls some one assist me in getting this thing done.
Regards,
Tulacenath.Hi Tulacenath
So your invoice table does not have a reference to the customers (companys) that the invoices belong to?
Tim -
Can I create a view based on two tables that have the same column name?
I have two tables A and B. Each table has 50+ columns.
I want to create a view that includes all the columns in A and all the columns in B. I created a view with a select statement that says
Select A.*, B.*
From A, B
where A.id = B.id
It returns an error because in each table I have a column that keeps track if a record has been changed called Modified_By. That's where it chokes up on I figure. I would like to write the view without explicitly writing each column name from A and B as part of the select statement. The actual select statement works fine and only bombs when trying to turn the select statement into a view.You will have to type the full column list at least once. You can save a few keystrokes (i.e. alias. on every column) by providing the column names to the CREATE part instead of in the SELECT part. Something like:
SQL> desc t
Name Null? Type
ID NUMBER
NAME VARCHAR2(10)
SQL> desc t1
Name Null? Type
T_ID NUMBER
LOC_ID NUMBER
NAME VARCHAR2(15)
SQL> CREATE VIEW t_v (id, t_name, t_id, loc_id, t1_name) AS
2 SELECT t.*, t1.*
3 FROM t, t1
4 WHERE t.id = t1.t_id;
View created.HTH
John -
Can my husband and I share the same user name and password on our I-4 phones?
Yes.. but it can introduce complications.
If you're going to use the same Apple ID for iCloud, contacts, calendars, and photo stream are all shared if enabled. -
Two Interface with same IDOC sperated by Document Type
Hi All,
I have Two interface which is for RFQ and Purchase order, bother uses same IDOC orders05, i need to indentify which one for which interface using Document type for purchase NB and and AN for RFQ , please help me to slove this isssue , hope we muct use Context object for this , but i dont know how to use it , please help me
thanking you
SridharHi,
Can you explain a bit about your scenario, coz I think it can be handle in other way without using context objects..
But if you want to use the context object, then you can add it in Message Interace ---> Context Objects, and in ID while doing RD you can find it under Condition Editor ---> take F4 help and then select context objects.
Regards,
Sarvesh
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