ENH: extend/implement and wizards

A couple of enhancement suggestions:
- Wouldn't it be great if, when creating a new class in the New Class wizard, all the abstract methods from the inherited class appeared in the new class skeleton as empty methods?
- Likewise, how about adding an 'implement interface' wizard - right click a class, choose 'implement interface', browse to the interface in a browse window (a bit like the browse for class to extend feature in the new class wizard), click OK and the set of empty methods appear at the end of the class.

A couple of enhancement suggestions:
- Wouldn't it be great if, when creating a new class in the New Class wizard, all the abstract methods from the inherited class appeared in the new class skeleton as empty methods?Logged enhancement request 2565904
- Likewise, how about adding an 'implement interface' wizard - right click a class, choose 'implement interface', browse to the interface in a browse window (a bit like the browse for class to extend feature in the new class wizard), click OK and the set of empty methods appear at the end of the class. This already exists, though not from the context menu. Tools | Implement Interface... will do exactly as you ask.

Similar Messages

Ok, easy question...About implements and extends

Im sure this will be simple to all of you, but I am still new to the Java language. I want to know the difference between using "extends" and "implements" in the way that its used in these examples:
With the "extends" keyword...
class PrimeThread extends Thread {
         long minPrime;
         PrimeThread(long minPrime) {
             this.minPrime = minPrime;
         public void run() {
             // compute primes larger than minPrime
     }And then with the "implements" keyword...
Using the interface "Runnable"
class PrimeRun implements Runnable {
         long minPrime;
         PrimeRun(long minPrime) {
             this.minPrime = minPrime;
         public void run() {
             // compute primes larger than minPrime
     }Can someone please explain when you would want to use the "extends" version and when you would want to use the "implements" version? Sorry for practically insulting your intelligence...I'm just trying to learn this language without a book as an experiment to see (how much/how fast) I can learn purely using the web resources...Thanks to anyone who wishes to explain this to me.

That's pretty much it.
An interface may extend zero or more other interfaces.
A class (except Object) always extends exactly one other class--either the class explicitly named with "extends", or Object if "extends" is not present.
A class may implement zero or more interfaces.
"Extends" implies a parent-child relationship. Interfaces extend other interfaces, and classes extend other classes.
"Implements" implies a contract stating that the class will provide implementations for all the methods declared in the interface (or the class will be declared abstract). If a class implements A, and A extends B, then that class must implement all methods declared in A and all methods declared in B.
Does this help?

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.

Difference between Implement and Extend

what is the difference between implements and extends and why do we use them
thanks,

classes extend one other class and implement as many
interfaces as they wish.
interfaces extend as many interfaces as they wish.But for all that, they both just mean "inherits."
There wouldn't even have to be two different words, since you never have a choice between X extends Y and X implements Y. For a given X and Y, only one of the two will be legal.

Implementing and Extends

What is the difference between implements and extends?
For example, public class Banner extends Applet implements Runnable =>
If you extend a Class, then you can use the members of the superclass(which is Applet in this situation). And if you implement a Class then you can also use the members of the class. And as far as i know the Class youre implementing is called an interface. I know that an interface is not implemented yet, and it contains a lot of empty methods like public interface Series{ int getNext(); void reset(); void setStart(int x); }   .
Then if you want to implement this interface you must use another class. In this class you define the methods and also write a couple of variables, whom you will be putting in the not implemented methods, like this=>
class ByTwos(extends superclass) implements Series { int start;    int val;   ByTwos(){start=0; val=0;}
public in getNext(){val +- 2}    public void reset(){start=0; val=0;}
public void setStart(int x) {start=x; val=x;}        }.
Then you create another Class with a main method and an object of type ByTwos, wherein you USE THE MEMBERS OF THE INTERFACE CLASS.
Are the things i wrote right? What is the difference then?

Shelby wrote:
jverd wrote:
If all the methods defining a type are abstract, you can make the type an interface. An
interface is very much like a class with all abstract methods. Users of that interface
don't care which implmentation they get. All they need to know is that they'll be able to
call the declared methods.Dense people really annoy me, and right now I'm being REALLY dense about the advantage of using
an interface. I can understand what you say about using an interface to define a type of something
like an animal. But since all of the variables in an interface are final, and all of the methods are only
signatures, it seems to me it would just be easier to create classes that use their own methods that
actually perform a task.You're only thinking of writing the concrete classes. Think about the code that uses the type.
Animal animal = goGetSomeRandomAnimalFromSomewhere();
animal.speak();
animal.feed();I define the Animal type, as an interface, and every user of Animal knows that any Animal (meaning an instance of any class that implements Animal) will be able to speak(), feed(), etc.
Now I'm making some kind of game with animals wandering around in it. I want to draw some random animal on the screen, have it make its noise and then go eat. At the point where my code is doing that (above), I don't know what specific Animal implementation I'll get, only that it will be an Animal. So I have to declare the animal variable as a supertype of all the classes that could come back.
The Animal type serves that purpose. It could be an abstract class, rather than an interface, but an abstract class can carry implementation, and my Animal class has no implementation. How does an Animal speak()? How does it feed()? Animal is simply a pure type. Interfaces are better suited for pure type defintions than abstract classes. That's their purpose.
In addition, my implementing classes can implement other interfaces besides Animal, such as, for instance, Serializable or Comparable. Java doesn't support multiple inheritance of implementation, but it does support multiple inheritance of type--via being able to implement multiple interfaces.
Remember--inheritance is primarily about type, NOT about code sharing.
As another example, consider the java.util.List interface. You can add() to a list, remove() from it, see if it contains() a particular element, etc. There are multiple ways you could implement a List, and there's not really any common implementation you'd want to assume. So we define a List interface--the pure type--and then we implement it in very different ways via ArrayList and LinkedList. (Actually, there's a layer or two of abstract classes between List and those implementations. The abstract classes define implementations of some of the methods that do have reasonable defaults--for instance if they only rely on other methods in the List interface.)
Now I want to do something with a List--say shuffle it or sort it or display its contents in a GUI--I don't care what kind of List you give me. I'm just going to use the methods that all lists provide to perform my operation.
public void sort(List list) {
// I can sort ANY List here
}Now, if you still don't think this makes sense, can you tell me how you'd do this without interfaces?

Whats the difference between implements and extends!??

Can an interface be extended or not??
If it can whats the difference between implements and extends??
Thank you!

Code Sample:
interface a implements aa{This is illegal. An interface cannot implement another interface. It can only extend another interface.
interface a extends aa{That's the way to do it. As already said above:
An interface can only extend another interface.
A class can extend another class.
A class can implement zero or more interfaces.
So, "implements" is only used for classes that implement interfaces. For the rest, "extends" is used.

[svn:cairngorm3:] 16634: Extended API to history and wizards to expose next and previous indices and destinations , improve error localization in Waypoint processors

Revision: 16634
Revision: 16634
Author:   [email protected]
Date:     2010-06-23 08:57:57 -0700 (Wed, 23 Jun 2010)
Log Message:
Extended API to history and wizards to expose next and previous indices and destinations, improve error localization in Waypoint processors
Modified Paths:
    cairngorm3/trunk/libraries/Navigation/src/com/adobe/cairngorm/navigation/history/Abstract History.as
    cairngorm3/trunk/libraries/Navigation/test/com/adobe/cairngorm/navigation/history/Waypoin tHistoryTest.as
    cairngorm3/trunk/libraries/NavigationParsleyTest/src/sample1/core/presentation/Navigation Bar.mxml

[svn:cairngorm3:] 16635: Extended API to history and wizards to expose next and previous indices and destinations , improve error localization in Waypoint processors

Revision: 16635
Revision: 16635
Author:   [email protected]
Date:     2010-06-23 09:56:15 -0700 (Wed, 23 Jun 2010)
Log Message:
Extended API to history and wizards to expose next and previous indices and destinations, improve error localization in Waypoint processors
Modified Paths:
    cairngorm3/trunk/libraries/Navigation/src/com/adobe/cairngorm/navigation/history/Abstract WaypointHistory.as
    cairngorm3/trunk/libraries/Navigation/test/com/adobe/cairngorm/navigation/history/Waypoin tHistoryTest.as

[svn:cairngorm3:] 16632: Extended API to history and wizards to expose next and previous indices and destinations , improve error localization in Waypoint processors

Revision: 16632
Revision: 16632
Author:   [email protected]
Date:     2010-06-23 07:27:14 -0700 (Wed, 23 Jun 2010)
Log Message:
Extended API to history and wizards to expose next and previous indices and destinations, improve error localization in Waypoint processors
Modified Paths:
    cairngorm3/trunk/libraries/Navigation/src/com/adobe/cairngorm/navigation/history/Abstract History.as
    cairngorm3/trunk/libraries/Navigation/src/com/adobe/cairngorm/navigation/history/Abstract WaypointHistory.as
    cairngorm3/trunk/libraries/Navigation/src/com/adobe/cairngorm/navigation/waypoint/decorat or/ContainerDestinationRegistration.as
    cairngorm3/trunk/libraries/Navigation/src/com/adobe/cairngorm/navigation/wizard/AbstractW izard.as
    cairngorm3/trunk/libraries/NavigationParsleyTest/src/sample1/core/application/ContentDest ination.as
    cairngorm3/trunk/libraries/NavigationParsleyTest/src/sample1/core/presentation/ContentVie wStack.mxml
    cairngorm3/trunk/libraries/NavigationParsleyTest/src/sample1/core/presentation/Navigation Bar.mxml
    cairngorm3/trunk/libraries/NavigationParsleyTest/src/sample1/messages/presentation/Messag esView.mxml
    cairngorm3/trunk/libraries/NavigationSpringASTest/src/sample1/messages/presentation/Messa gesView.mxml
    cairngorm3/trunk/libraries/NavigationSwizTest/src/sample1/messages/presentation/MessagesV iew.mxml
Removed Paths:
    cairngorm3/trunk/libraries/NavigationParsleyTest/src/sample1/messages/presentation/MyStat eWizard.mxml
    cairngorm3/trunk/libraries/NavigationSpringASTest/src/sample1/messages/presentation/MySta teWizard.mxml
    cairngorm3/trunk/libraries/NavigationSwizTest/src/sample1/messages/presentation/MyStateWi zard.mxml

[svn:cairngorm3:] 16464: Added first history and wizard implementation to SpringAS extension.

Revision: 16464
Revision: 16464
Author:   [email protected]
Date:     2010-06-04 11:07:46 -0700 (Fri, 04 Jun 2010)
Log Message:
Added first history and wizard implementation to SpringAS extension.
Modified Paths:
    cairngorm3/trunk/libraries/NavigationSpringAS/.actionScriptProperties
    cairngorm3/trunk/libraries/NavigationSpringAS/src/com/adobe/cairngorm/navigation/core/Met adataUtil.as
    cairngorm3/trunk/libraries/NavigationSpringAS/src/com/adobe/cairngorm/navigation/history/ GlobalHistory.as
    cairngorm3/trunk/libraries/NavigationSpringAS/src/com/adobe/cairngorm/navigation/history/ WaypointHistory.as
    cairngorm3/trunk/libraries/NavigationSpringAS/src/com/adobe/cairngorm/navigation/landmark /AbstractNavigationProcessor.as
    cairngorm3/trunk/libraries/NavigationSpringAS/src/com/adobe/cairngorm/navigation/wizard/W izard.as
    cairngorm3/trunk/libraries/NavigationSpringASTest/src/sample1/core/presentation/Navigatio nBar.mxml

Remember that Arch Arm is a different distribution, but we try to bend the rules and provide limited support for them. This may or may not be unique to Arch Arm, so you might try asking on their forums as well.

[svn:osmf:] 14322: DVR: extending implementation details.

Revision: 14322
Revision: 14322
Author:   [email protected]
Date:     2010-02-22 05:44:21 -0800 (Mon, 22 Feb 2010)
Log Message:
DVR: extending implementation details. Extending NetLoader with a time trait factory function, adding a timeTrait property to NetStreamLoadTrait, and having VideoElement use the new property on adding element traits.
Adding 'LocalFacet', removing 'LayoutFacet', and changing layout facets to inherit from LocalFacet.
Modified Paths:
    osmf/trunk/framework/OSMF/.flexLibProperties
    osmf/trunk/framework/OSMF/org/osmf/elements/VideoElement.as
    osmf/trunk/framework/OSMF/org/osmf/layout/AbsoluteLayoutFacet.as
    osmf/trunk/framework/OSMF/org/osmf/layout/AnchorLayoutFacet.as
    osmf/trunk/framework/OSMF/org/osmf/layout/BoxAttributesFacet.as
    osmf/trunk/framework/OSMF/org/osmf/layout/LayoutAttributesFacet.as
    osmf/trunk/framework/OSMF/org/osmf/layout/PaddingLayoutFacet.as
    osmf/trunk/framework/OSMF/org/osmf/layout/RelativeLayoutFacet.as
    osmf/trunk/framework/OSMF/org/osmf/net/NetLoader.as
    osmf/trunk/framework/OSMF/org/osmf/net/NetStreamLoadTrait.as
    osmf/trunk/framework/OSMF/org/osmf/net/dvr/DVRCastDVRTrait.as
    osmf/trunk/framework/OSMF/org/osmf/net/dvr/DVRCastNetConnectionFactory.as
    osmf/trunk/framework/OSMF/org/osmf/net/dvr/DVRCastNetLoader.as
    osmf/trunk/framework/OSMF/org/osmf/net/dvr/DVRCastNetStream.as
    osmf/trunk/framework/OSMF/org/osmf/net/dvr/DVRCastStreamInfoRetreiver.as
    osmf/trunk/framework/OSMF/org/osmf/traits/DVRTrait.as
Added Paths:
    osmf/trunk/framework/OSMF/org/osmf/metadata/LocalFacet.as
    osmf/trunk/framework/OSMF/org/osmf/net/dvr/DVRCastConstants.as
    osmf/trunk/framework/OSMF/org/osmf/net/dvr/DVRCastRecordingInfo.as
    osmf/trunk/framework/OSMF/org/osmf/net/dvr/DVRCastStreamInfo.as
    osmf/trunk/framework/OSMF/org/osmf/net/dvr/DVRCastTimeTrait.as
Removed Paths:
    osmf/trunk/framework/OSMF/org/osmf/layout/LayoutFacet.as

Extends Thread and Remote

Hi.
I have a server that creates a Thread to comunicate to other server (a secondary server) using sockets.
public class Server extends Thread {
}I need to use RMI now but I can't extend Thread and Remote.
What can I do?
Thanks

Implement the Runnable interface and extend the Remote class. This way you can Construct A thread and pass it an instance of your Runnable interface. ie.
class MyClass extends Remote implements Runnable{
// put what ever methods you need and implment the run method
// for Runnable interface
now you can do this.
Thread myThread = new Thread(new MyClass());
myThread.start(); // to kick it off

RMI without extends/implements Remote stuff

Hi RMI-Experts,
is there a way to avoid the extends/implements Remote stuff with RMI.
Where can I find information about my topic?
It's not only that I'm lazy, but I want to have arbitrary interfaces exported to RMI also.
If you have a solution, is it possible for both 1.3 and 1.4?
Cheers,
Peter

Hi RMI-Experts,
is there a way to avoid the extends/implements Remote
stuff with RMI.No, extends Remote is neccesary.
Where can I find information about my topic?In the tutorials section of this site, look for the RMI tutorial.
It's not only that I'm lazy, but I want to have
arbitrary interfaces exported to RMI also. That is not possible. Because an RMI call is over the network, there is a whole bunch of things that can go wrong. Since it is neccesary to signal these failures, all methods must be declared to throw a RemoteException.
It might however be possible to autogenerate a Remote version of an arbitrary interface, assuming that all used types are at least serializable. I really wouldn't recommend this.
If you have a solution, is it possible for both 1.3
and 1.4?I dont think it is possible
Cheers,
Peter

Hi all.When pressed play and make some changes in loop (eg fade in fade out) are very slow to implement, and also the loops from the library are very slow to play, corrects the somewhat self so is the Logic??

hi all.When pressed play and make some changes in loop (eg fade in fade out) are very slow to implement, and also the loops from the library are very slow to play, corrects the somewhat self so is the Logic??

Hey there Logic Pro21,
It sounds like you are seeing some odd performance issues with Logic Pro X. I recommend these troubleshooting steps specifically from the following article to help troubleshoot what is happening:
Logic Pro X: Troubleshooting basics
http://support.apple.com/kb/HT5859
Verify that your computer meets the system requirements for Logic Pro X
See Logic Pro X Technical Specifications.
Test using the computer's built-in audio hardware
If you use external audio hardware, try setting Logic Pro X to use the built-in audio hardware on your computer. Choose Logic Pro X > Preferences > Audio from the main menu and click the Devices tab. Choose the built in audio hardware from the Input Device and Output Device pop-up menus. If the issue is resolved using built-in audio, refer to the manufacturer of your audio interface.
Start Logic with a different project template
Sometimes project files can become damaged, causing unexpected behavior in Logic. If you use a template, damage to the template can cause unexpected results with any project subsequently created from it. To create a completely fresh project choose File > New from Template and select Empty Project in the template selector window. Test to see if the issue is resolved in the new project.
Sometimes, issues with the data in a project can be repaired. Open an affected project and open the Project Information window with the Project Information key command. Click Reorganize Memory to attempt to repair the project. When you reorganize memory, the current project is checked for any signs of damage, structural problems, and unused blocks. If any unused blocks are found, you will be able to remove these, and repair the project. Project memory is also reorganized automatically after saving or opening a project.
Delete the user preferences
You can resolve many issues by restoring Logic Pro X back to its original settings. This will not impact your media files. To reset your Logic Pro X user preference settings to their original state, do the following:
In the Finder, choose Go to Folder from the Go menu.
Type ~/Library/Preferences in the "Go to the folder" field.
Press the Go button.
Remove the com.apple.logic10.plist file from the Preferences folder. Note that if you have programmed any custom key commands, this will reset them to the defaults. You may wish to export your custom key command as a preset before performing this step. See the Logic Pro X User Manual for details on how to do this. If you are having trouble with a control surface in Logic Pro X, then you may also wish to delete the com.apple.logic.pro.cs file from the preferences folder.
If you have upgraded from an earlier version of Logic Pro, you should also remove~/Library/Preferences/Logic/com.apple.logic.pro.
Restart the computer.
Isolate an issue by using another user account
For more information see Isolating an issue by using another user account.
Reinstall Logic Pro X
Another approach you might consider is reinstalling Logic Pro X. To do this effectively, you need to remove the application, then reinstall Logic Pro X. You don't have to remove everything that was installed with Logic Pro X. Follow the steps below to completely reinstall a fresh copy of Logic Pro X.
In the Finder, choose Applications from the Go menu.
Locate the Logic Pro X application and drag it to the trash.
Open the Mac App Store
Click the Purchases button in the Mac App Store toolbar.
Sign in to the Mac App Store using the Apple ID you first used to purchase Logic Pro X.
Look for Logic Pro X in the list of purchased applications in the App Store. If you don't see Logic Pro X in the list, make sure it's not hidden. See Mac App Store: Hiding and unhiding purchases for more information.
Click Install to download and install Logic Pro X.
Thank you for using Apple Support Communities.
Cheers,
Sterling

I have Photoshop CS6 Extended Students and Teachers Edition. When I go into the Filter/Oil paint and try to use Oil paint a notice comes up "This feature requires graphics processor acceleration. Please check Performance Preferences and verify that "Use

I have Photoshop CS6 Extended Students and Teachers Edition. when I go into the Filter/Oil paint and try to use Oil Paint a notice comes up "This feature requires graphics processor acceleration. Please Check Performance Preferences and verify that "Use Graphics Processor" is enabled. When I go into Performance Preferences I get a notice "No GPU available with Photoshop Standard. Is there any way I can add this feature to my Photoshop either by purchasing an addition or downloading something?

Does you display adapter have a supported GPU with at least 512MB of Vram? And do you have the latest device drivers install with Open GL support. Use CS6 menu Help>System Info... use its copy button and paste the information in here.

ENH: extend/implement and wizards

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