What do we Inherit?

Hello again,
Guys I've read this tutorial :
http://java.sun.com/docs/books/tutorial/java/IandI/subclasses.htmlas one of you suggested in one of your replies to my question on topic about inheritance and that's fine. Unfortunately in this tutorial two sentences contradict each other:
1. A subclass inherits all the members (fields, methods, and nested classes) from its superclass. Constructors are not members, so they are not inherited by subclasses, but the constructor of the superclass can be invoked from the subclass.
2. A subclass does not inherit the private members of its parent class.
Moreover in netbeans while debugging it shows that private members of superclass are inherited by child class.
So what's going on? Which sentence is true? And really, but on sun's official website this kind of error shouldn't have place.
Looking forward to your reply

atch7 wrote:
Well it's not really semantics.Yes, it is just semantics. Most likely, you don't know exactly what the definition of "inheritance" is in Java. You probably have some general OO notion of it, as we all do, but chances are your general notion is not the same as mine, and neither is likely to be a perfect match for Java's definition. So when you ask, "Are private members inherited?" it's not whether they're inherited that matters, because that question is answered by which definition of inheritance you use. Hence, it's just semantics. What matters is what the rules and mechanisms are in Java.
Its fundamental very important concept. Well you saying that it makes no difference but I cannot agree. It is fundamental to know and understand how the mechanism of inheritance work and in order to understand that one has to know about basic concepts like inheritanceIt's important to understand the mechanisms.
and which members are inheritedIt's not really that important what the exact definition of inheritance is in Java.
and I really wish that sun would make it clear Yes, it would be nice if the JLS was clear, precise, and consistent. But if they did make it clear, precise, and consistent what exactly is inherited, that would NOT clear up any of the mechanisms, only what Java's particular definition of inheritance happens to be.
You seem to be approaching this from the perspective of, "There is one universal, standard, precise definition of inheritance in OO languages. What in Java fits that definition?" I don't think such a definition exists.
and do not make any more such a basic mistakes. Is there in java (I'm sure there is) a method which will allow me to check size of an object of any class? Doing so I would answer to my question myself but logically thinking every member is inherited otherwise on what member would we operate in derived class through public methods?See, here you're assuming that the definition of "inherited" is essentially "present." It's not that simple.

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treyer11 wrote:
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public void mouseReleased(MouseEvent e) {

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I keep my Macbook up to date by checking regularly via software update, so far with no mishaps, but I have seen people on these forums mentioning that a it is better to download the combo updates direct from Apples website. Is this true, if so why, and what is the difference? I am thinking of installing Leopard which would then probably need updating to the current version, so what is the correct way of doing this?

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If you can, make a full backup first.
Turn off sleep mode for both screen and hard disk.
Disconnect all peripherals except your keyboard and mouse.
1. Repair Permissions (in Disk Utility)
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The 10.4.11 Combo Updater for PPC Macs is here: http://www.apple.com/downloads/macosx/apple/macosx_updates/macosx10411comboupdat eppc.html
And for Intel Macs: http://www.apple.com/downloads/macosx/apple/macosx_updates/macosx10411comboupdat eintel.html
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More information on using Software Updater here:
http://support.apple.com/kb/HT1338
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5. Unplug all peripherals except your keyboard and mouse.
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SuperDuper: Same thing as Chronosync, really, just a different piece of software.
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Two 3–4 TB HDDs or RAID0 arrays.
Storing of general project archives, images, documents, movies, music, that kind of thing.
Possibly for system backup with Time Machine.
Now, how I'd prefer it to work is:
I keep both hard drives plugged in via FireWire cables.
Ideally, whenever I edit, add or delete a file on one hard drive the change is immediately made to the other.
Once the syncing is set up I never touch it again, don't have to.
The only time I ever have to come back to it is if I'm swapping out one or both of the drives for larger ones.
All of this is controlled by some sort of GUI
I'm willing to accept terminal commands if I have to... But I'd really prefer not to. Also, if the syncing has to be done every hour or once a day or some other similar schedule I'm willing to accept that as well, though it's not preferred.
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True, it's not technically backup in the traditional sense. What I'm looking for is data protection and redundancy, which is a factor of backups. So in that sense it kind of is, but I see your point.
Anyway, the reason I'm avoiding RAID is because:
1. It can be a pain to manage.
2. It's horribly inflexible.
3. It's protection is limited.
4. It brings it's own set of hazards.
5. RAID arrays can be very expensive once they start getting complex.
I will likely end up going RAID partially in the end simply because I have a 2 TB external and it's filling fast. I can grab a 3 TB now but I've heard reliability issues so instead I'm thinking two 4TB (2x2TB) RAID0 arrays that I sync.
This gives me the benefit of RAID in a simple form, which bypasses the larger array complexities, while leaving me still fully protected and highly flexible. It also doesn't have the inherent risks of RAID because if one of the arrays goes down it will in no way effect the other.
Honestly, I'm not worried about file changes. At all. I'm the only one who's touching the files (well, not true, but everyone else only has read-access). I also tend to not delete things (which is why I have a 2 TB drive that's filling fast). Expansion is my main concern and RAID expansion can be a nightmare unless you go for some of the more expensive systems that are easier to manage. With ease of management comes a hefty price.

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Without knowing what you have tried please open System Preferences - Sharing - File Sharing and select File Sharing. If you still have trouble you can call AppleCare in the morning when they re-open. You have 90 days of telephone support if you haven't already bought AppleCare.

HT201250 My MacBook Pro (using OSX 10.7.5) suddenly can't find the Time Machine backup disk, which is on the harddrive of my desktop iMac. What to do?

My MacBook Pro (using OSX 10.7.5) suddenly can't find the Time Machine backup disk, which is on the harddrive of my desktop iMac. What to do?

Inherit a Backup
Inherit a Backup (2)

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(...etc)
somesprite.mask=somemask;
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1-b. inconsistency between hierarchy and coordinates, specially masks: you apply a mask to a sprite, yet the sprite has a set of coordinates (so 'x' in the sprite means an x relative to its container), yet the mask applied to the very same sprite, as another reference as reference for coordinates (like the stage)
2. painting via script: in any other languaje, in any other situation, something like:
beginFill(params);
(...stuff 1)
endFill();
beginFill(params);
(...stuff 2)
endFill();
(...etc)
means: render region of block 1, then render region of block 2 etc, and no matter what, it should be consistent, since there is noplace for ambiguity. if you read it, you may think what that means, even if you dont run it you may have an idea of the picture you want to draw, but not with as3. as3 somehow manages to screw something that simple, and mixes all the blocks, and somehow uses the boundaries of one block as boundaries for other block. is like all blocks are dumped into whatever, and then uses all lines defined into it as boundaries for a unique block. it changes all boundaries and generates inconsistency between what is shown and redraw regions of the resulting picture, like lines that go to the end of the screen and then dont go away in the next frames, even tough the beginfill endfill block should prevent it
3. event flow: i dont know what was the policy behind as3 event flow design. it is in no way similar or an extension to previous event flow, neither with any event flow in any other plattform. i dont know how most people start with as3; in my case, i unpacked, installed and when i tried to do something with what i already knew i could not, so i started reading the as3 docs, and since is like 800 pages long, i just read the basics and the rest i would 'wing it'. in the part of the event flow, there was something about bubbling and stuff, it was not clear at all and when i tried to do what is was said in the documentation (like preventing events to 'bubble', as is called in the documentation), i could not see any effect but i could see it was a mess. flash is not the only thing out there to work with pictures or to work with mouse events, but is the only one that deals with things like 'target' and 'currentTarget'. my first experience on needing this was when i was dealing with my own event handlers (so the only thing that had control over mouse was the stage, and i would admin everything via script). there were events generated everywhere, the stage got events that were not genrated directly over the stage, but got there not with stage coordinates but the coordinates relative to the sprite that generated the event. so if i hover the mopuse over the stage, and the stage has some things on it how does it work? i get multiple event calls, like it was hovering multiple times over the stage in a single frame, but in each call with different coordinates? and what if i set all child sprites as mouseenabled=false or compare like 'if (event.target != event.currenttarget)', what if i move the mouse over a child, does it prevent the move mouse event at all? or does it filter only the event call with only stage coordinates? in my case, every time i move over another clip (with mouseenabled = true), the stage gets it as 'mouse up', even tough there was never a mouse release, what the hell? do even the people at adobe know how to handle events with their own tool when they require it? why does an event 'bubble' when i have not specifically tell it to do it? mi thought is that this event flow was very poorly conceived, and tough the intention may have been that there were different cases and it shopuld cover all cases, they actually introduced new problems that were not present in traditional ways to handle it, and it is neither the easier way to handle things, and this way, a very simple problem turns into a very ugly thing because it must handle things that were not neccesary to handle, or were implicit in other situations.
4. legacy: since as3, all interaction is different, and if you want to do things in the new plattform, using the new features, what you already knew just goes to the garbage can. when a new tool arrives, it should be an extension to previous tools (which is a reason to update instead of just buying a new tool from a different vendor). if everything i had or knew just means nothing from now on, then i can not say 'i know flash script', and my previous knowledge gives me no advantage when aproaching the new version. as3 is a new aproach that requires doc reading and stuff, even if you knew something about previous as specifications or other oo languajes. if you decide to change things from now on, like the things mentioned in this post, instead of just throwing away everything the users alerady knew about the tool, do like in java releases, they mark some things as 'deprecated', they keep working as they should, give a warning, but also a message saying this feature is deprecated, we suggest you use this library instead.
5. lack of previous functionality: if you 'update' something, it meand all previos functionality is still there (probably improved, but not with bugs if it was working fine), plus something else. now it seems backwards, there are some things that could be done in previous versions but not in this one, like 'duplicatemovieclip'
6. inconsistency with scripting/programming paradigms: (ok, fancy work, but fits perfectly here): as3 proposed ways to handle things, but the people who designed it got 'too creative', and they did something that is not consistent neither with previous versions of as or with other languajes. the documentations is full of things like 'it looks like x languaje or languaje family, but instead of using XXX word, you must use YYY'. great, what is this? namespaces 'work like', but 'differently' for example from java, .net, .c. its got the idea that a namespace means a grouped functionality but there are rules about where should be placed the file (ok, java has this also, .net takes care of it automatically if all files are registered in the project), but what you got is a mess that 'if you know other languajes you got the general idea, but nonetheless, even if you knew this or previosu versions of as, you still have to read whatever we decided arbitrarily just to be different'. namespaces, event handling, vars definition which is not like previous scripting neither like fully typed languajes.. is just a mess.
7. lack of scripting and graphics integration: unlike flash and adobe tools that just got on the graphics side leaving all the scripting integratuion apart, most tools from other vendors integrate very well interacton with what is on the screen. the script editor: very poor. autocompletion? a drop down list that does not heklp at all, appears in the wrong places, and when you need it to go, it does not go (so if i want to move away from the uncalled drop down list, i have to click somewhere else, making developement slowewr instead of helping, so the drop down list does not capture all events when i dont want to). in other ides you double click somewhere and it will go to the part of code relevant to that event or whatever. for example microsoft tools, ok i am antimicrosoft, and one of the reasons was that when windows 95 got to market proposing itself as the ONLY pc os you could use if you wanted to keep useing the apps you already had, it was a lousy product full of flaws but you had to keep using it because you had no choice. what is so different from what is happening with flash just now? yet the ide of c# is awesome, works very well and seems reliable.
adobe people: not all user are designers that just make pretty pictures. if it is not intended for scripting then why is it there. and if there are corrections to be done, they should patch all versions, not only the last one. previous version users also paid for their versions.

Well, there is no point in arguing.
I personally believe AS3 does exactly what it promises to do within limits (read: reasonable limits) of ECMA type of language. And sometimes it doesn’t do what we expect it to for it cannot possibly emulate everyone’s thinking process. The task, I guess, is to learn to think in terms of AS3 – not to try to make AS3 think like us. No language covers all the grounds. And no, it is not Java - with no negative or positive connotation. It is what it is. Period. I just hope that AS5 will be more Java like.
You are right about the fact that it is not necessary to know all the aspects of language in order to perform the majority of tasks. But it is paramount to have a clear idea about such fundamental concepts as display list model and events. For instance, depth swap has no meaning in terms of AS3 because display list object stacking is controlled automatically and there is no need for all these jumping through hoops one has to perform in order to control depth in AS2. There no more gaps in depths and one always know where to find things.
Similarly, there is no point in having duplicateMovieClip method. More conventional OOP ways of object instantiation accomplishes just that and much more. Just because OOP object instantiation needs to be learned doesn’t mean past hacks have place in modern times. duplicateMovieClip is a horse carriage standing next to SUV. What one should choose to travel?
Events are implemented to the tee in the context of ECMA specifications. I consider Events model as very solid, it works great (exactly as expected) and never failed me. True, it takes time to get used to it. But what doesn’t?
By the way, speaking about events, contrary to believe in Adobe’s inconsideration to their following. Events are implemented with weakly reference set to false although it would be better to have it set to true. I think this is because there are smart and considerate people out there who knew how difficult it would be for programming novices to deal with lost listeners.
I think AS3 is million times better than AS2. And one of the reasons it came out this way is that Adobe made a very brave and wise decision to break totally loose from AS2’s inherent crap. They have created a totally new and very solid language. If they had tried to make it backward compatible – it would be a huge screw up, similar to how our friends at Microsoft are prostituting VB and VBA – extremely irritating approach IMHO.
Also, Flash legacy issues shouldn’t be overlooked. Flash did not start as a platform for programmers. Entire timeline concept in many ways is not compatible with the best OOP practices and advancements. I think for anyone who is used to writing classes the very fact of coding on timeline sounds awkward. It feels like a hack (and AS2 IS a pile of hacks) – the same things can be nicely packaged into classes and scale indefinitely. As such I wouldn’t expect Adobe to waste time on hacking timeline concept issues by making smarter editor. They have made a new one – FlexBuilder – instead. Serious programmers realize very soon that Flash IDE is not for developing industrial strength applications anyway. So, why bother with channeling great minds into polishing path to the dead end?
I would like to state that all this is coming form a person who knew Flash when there was no AS at all. And I applaud every new generation of this wonderful tool.
I believe Adobe does a great job making transition from timeline paradigm to total OOP venue as smooth as possible. And no, they don’t leave their devoted followers behind contrary to many claims. They are working on making developing Flash applications as easy as possible for people of all walks. Welcome Catalyst!
Of course there is not enough information about AS3 capabilities and features. But, on the other hand, I don’t know any area of human kind activities that does.

What I would like from Cisco is the meaning of all level 3 or lower email messages my Router can send to me. So, that I can take the appropriate actions.

v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:"Table Normal";
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-priority:99;
mso-style-qformat:yes;
mso-style-parent:"";
mso-padding-alt:0in 5.4pt 0in 5.4pt;
mso-para-margin-top:0in;
mso-para-margin-right:0in;
mso-para-margin-bottom:10.0pt;
mso-para-margin-left:0in;
line-height:115%;
mso-pagination:widow-orphan;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
mso-ascii-font-family:Calibri;
mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:"Times New Roman";
mso-fareast-theme-font:minor-fareast;
mso-hansi-font-family:Calibri;
mso-hansi-theme-font:minor-latin;
mso-bidi-font-family:"Times New Roman";
mso-bidi-theme-font:minor-bidi;}
My Small Business Router has been sending me email messages. This is a RVS-4000 version 1.
I just want to understand what my Router is emailing me or telling me...
The last message I received from my RVS-4000 was:
Oct 30 13:44:09 - IPSEC EVENT: KLIPS device ipsec0 shut down.
IPSEC EVENT sounds important. Whatever it is... And what is a KLIPS device ipsec0 shutdown????
I have Log Levels 0-3 selected...
Log Level
Setting which level log Router should recorder. Level from 0 ~ 7 means:
0: LOG_EMERG(system is unusable)
1: LOG_ALERT(action must be taken immediately)
2: LOG_CRIT(critical conditions)
3: LOG_ERR(error conditions)
4: LOG_WARNING(warning conditions)
5: LOG_NOTICE(normal, but significant, condition)
6: LOG_INFO(informational message)
7: LOG_DEBUG(debug-level message)
So, when I get any messages... I'm a little concerned. Because the RVS-4000 thinks it's an Error or better.
What I would like from Cisco is the meaning of all level 3 or lower email messages my Router can send to me. So, that I can take the appropriate actions.
I know Cisco inhered these Small Business Routers. When they bought Linksys. However, they have not discontinued them totally and they are still for sale. And Cisco has released a new version 2 of the same Router. So I believe Cisco should support them as well.
Yes, I'm a pain to Cisco. However, I think you understand I'm being scared by my Routers messages to me... And would like some relief.
Bruce

Great suggestions. Problems is this is not the forum for your "wish list" as Apple does not read these USER forums.
Send your feedback to http://www.apple.com/feedback/iphone.html

I want to create a TTL pulse. The stepper motor I'm trying to control responds to a high to low edge, when the low pulse width is greater than 0.5 microseconds. What is the best way to go about creating a pulse like this?

I'm using the NI PCI-6025E card connected to an SCB-100 wiring peripheral. I'm programming the DAQ card using LabVIEW 6.0.2 on a win95 box.
My first attempt has yielded some surprising results.
I created a vi with a single while loop set to true. Within that while loop is a two frame sequence. Both frames use the "Write to Digital Line.vi".
The first frame sets the line in wire to false.
The second frame sets the line in wire to true.
The device channel on both frames has been set to my user defined channel nam
e -> clock.
clock --> sets the DIO0 channel to be digital write out.
Using an oscilloscope and some wires I hook ground to the SCB-100's digital ground and I hook the probe to the DIO0 channel. What I see are two different pulses alternating between one another. One has a pulse width of 5ms and the other has a pulse width of about 50ms. You seem to get a grouping of one type of pulse followed by a grouping of the other type of pulse.
Obviously this is very strange and not what I want. It is also far too slow. So I'd like to know if anyone knows how to do this properly. Remember I only need a low pulse width of 0.5 microseconds.
Thanks,
Any help or guidance would be much appreciated.
Scott

Scott,
You don't need to use a digital line to create a TTL pulse. The PCI-6025E has two onboard general purpose counters. You can use one of these counters to create a single pulse of the desired pulse width. For an example of how to program the counters on your board, refer to LabVIEW's Search Examples>>I/O Interfaces>>Counters>>Pulse Generation>>DAQ-STC based.
The advantage of using a counter over the digital line is that it allows you to control the timing of the pulse through hardware and not software. Thus, it is inherently faster, and the timing resolution is more accurate. The counter will count down an internal 20 MHz timebase to create the pulse delay and the pulse width.
For more information on the hardware capabilities of your board, you can refe
r to the User Manual online at www.ni.com/manuals.
Hope this helps.
Regards,
Erin

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