Question of State of Java RTS

While reading recent Java blogs and the likes, I stumbled across a [post on improvements to Java|http://paulhammant.com/blog/at-least-one-unilateral-improvement-to-java.html]. In it, it mentions a [presentation |http://www.adacore.com/wp-content/files/attachments/PaperPresentationAE2006-Brosgol.pdf]comparing Java and ADA, that talks about concerns about Java in the RTS sense in context of DoD 178B.
It indicates the need for "named parameter" and related concerns.
Since this presentation is a few years old...I am curious, are these concerns still true? Would these be suggestions for improving Java RTS?
Eric

The presentation is not very old - only 2006. The concerns are still true as the Java language and the RTSJ have not changed - neither Java or the RTSJ are compliant with DoD 178B. As the presentation indicates a new JSR (now known as JSR-302) was put together to define "safety-crtiical Java" which is a subset of Java and the RTSJ. There are different levels in 302 and depending on the level different language/runtime/API features are disallowed. JSR-302 is still under development.
Re the comment about "named parameters" - Java doesn't have them and is not likely to ever have them. They prevent certain classes of programming error from arising eg: method declared as foo(int x, int y) and is accidentally invoked as foo(my_y, my_x) thus passing the parameters in the wrong order. Named parameters require the call to be made as foo(x=my_x, y=my_y) and so the order is irrelevant. It's hardly foolproof though, you can still do foo(x=a, y=b) when you should have done foo(x=b, y=a).
Edited to add: Having just read that blog entry I don't think he's talking about the same kind of "named parameters" - at least I couldn't recognize them from the blog.
Check out JSR-302 via the jcp.org website for more info.
David Holmes (JSR-282 EG Member)
Edited by: davidholmes on Apr 9, 2008 10:42 PM

Similar Messages

Java RTS 2.1 General Availability free evaluation releases available

Hi:
I would like to notify this forum that free evaluation releases of
Java Real-Time System (Java RTS) 2.1 General Availability (GA)
are available for download for the following platforms:
* Solaris 10 (Update 4 and Update 5) on SPARC and x86
* Linux with real-time POSIX APIs on x86. The specific Linux
distributions which this release has been tested on (at the time
of this writing) are: SUSE Linux Enterprise Real Time 10 SP2
(released) and Red Hat Enterprise MRG 1.0 Errata (to be released).
The URL for the web page where to start in order to be able to
get to the download link for any of the Java RTS 2.1 GA evals is:
[http://java.sun.com/javase/technologies/realtime/rts/]
You will be asked to fill out a quick survey and agree to a click-
through e-license, then a download link will be e-mailed to you.
The latest version of the Java RTS 2.1 GA technical documentation
bundle included with the product is being separately maintained at
our product website and can be accessed starting from here:
[http://java.sun.com/javase/technologies/realtime/reference/rts_productdoc.html]
Please also make sure to check out our updated FAQ:
[http://java.sun.com/javase/technologies/realtime/faq.jsp]
Thanks,
-Carlos
Carlos B. Lucasius
Java SE Embedded and Real-Time Engineering
Sun Microsystems, Inc.
[http://sites.google.com/site/javartsandjavaseforembedded/]

Hello,
Just a quick question: can we have an official position from Sun regarding support of earlier releases of Solaris with Java RTS 2.1? Our customer is currently running Solaris 10 Update 3 with current Recommended patches, and the 2.1 beta cyclic driver supported this version of Solaris. However with the official release version of 2.1, support for U3 disappeared (only U4 and U5 are now supported). Aside from "rubber stamping" the Solaris build via /etc/release, is there a technical reason why U3 is no longer supported? As long as our kernel is up to date, can we safely use 2.1? Or is it just a case of being unable to officially support and test so many releases of Solaris?
Is this a general rule-of-thumb we can expect in future: only supporting the last 2 updates of Solaris 10?
Your advice is appreciated.
Thanks,
Dave.

Java RTS 2.1 Beta free evaluation release for Solaris and Linux available

Hi:
I would like to notify this forum that a free evaluation release of
Java Real-Time System (Java RTS) 2.1 Beta is now available for downloading
at our public web site.
Supported platforms are Solaris/SPARC, Solaris/x86, and Linux/x86 with
real-time POSIX APIs. The specific Linux distributions which this release
has been tested on are: SUSE Linux Enterprise Real Time 10 (released)
and Red Hat Enterprise MRG 1.0 (beta). As for the Solaris versions,
both Solaris 10 Update 3 and Update 4 are supported.
The URL for the web page where to start in order to be able to get to
the download link is:
http://java.sun.com/javase/technologies/realtime/rts/
The download link will be presented to you after you fill out a quick
survey and agree with a click-through, 90-days e-license.
The latest version of the Java RTS Beta technical documentation
bundle included with the product is being separately maintained at
our public website and can be accessed starting from here:
http://java.sun.com/javase/technologies/realtime/reference/rts_productdoc.html
Thanks,
-Carlos
Carlos B. Lucasius
Java SE Embedded and Real-Time Engineering
Sun Microsystems, Inc.
http://java.sun.com/javase/technologies/embedded/index.jsp
http://java.sun.com/javase/technologies/realtime.jsp
http://java.sun.com/javase/technologies/realtime/faq.jsp
http://developers.sun.com/learning/javaoneonline/j1sessn.jsp?sessn=TS-1331&yr=2007&track=5
http://developers.sun.com/learning/javaoneonline/j1sessn.jsp?sessn=TS-2901&yr=2007&track=5
http://developers.sun.com/learning/javaoneonline/j1lab.jsp?lab=LAB-7250&yr=2007&track=4
http://www.sun.com/training/catalog/courses/DTJ-4103.xml
http://www.youtube.com/v/xH1yUXd9krU
http://blogs.sun.com/jtc/
http://blogs.sun.com/delsart
http://blogs.sun.com/bollellaRT

Hello,
Just a quick question: can we have an official position from Sun regarding support of earlier releases of Solaris with Java RTS 2.1? Our customer is currently running Solaris 10 Update 3 with current Recommended patches, and the 2.1 beta cyclic driver supported this version of Solaris. However with the official release version of 2.1, support for U3 disappeared (only U4 and U5 are now supported). Aside from "rubber stamping" the Solaris build via /etc/release, is there a technical reason why U3 is no longer supported? As long as our kernel is up to date, can we safely use 2.1? Or is it just a case of being unable to officially support and test so many releases of Solaris?
Is this a general rule-of-thumb we can expect in future: only supporting the last 2 updates of Solaris 10?
Your advice is appreciated.
Thanks,
Dave.

Convert a logic from SQL statement to java

Hi.,
I m using jdeveloper 11.1.1.5
I had used one sql statement as gievn below
(SELECT max(decode(LENGTH(fy_year),4, fy_year + 1,6,SUBSTR(fy_year, 1, 4)+1||SUBSTR(SUBSTR(fy_year, 1, 4) + 2, 3, 2)))YEAR from fin_years)I need to use this logic in java
Could anyone pls help me

"wilhelm,"
I've seen some ridiculous questions in my life. This is one of them.
There are just so many things wrong here. So, so many.
SELECT statements get data from databases; they are not "logic."
Do you really expect us to parse your SQL and try to guess what it is supposed to do?
Do you really believe that when converting a Forms app to Java that you "convert" SQL statements to Java?
Do you really believe that going through your forms app and "converting" it to ADF is a sensible approach?
John

How to Dynamically construct the conditional IF statement in java

Is there a way to dynamically construct a conditional IF statement in java?
For example:
Suppose i have a 2D array like:
Array[the actual values to search for][the column number in the table to perform the search on].
e.g.
Array {
             {"x"} , {1},
             {"y"} , {2},
             {"z"} , {3},
}How can i construct the if statement like:
Looping over table rows (tableRow) {
    Looping over array {
        IF ( {"x"}. equals( tableModel.getValueAt( tableRow, {1})   &&
               {"y"}. equals( tableModel.getValueAt( tableRow, {2})   &&
               {"z"}. equals( tableModel.getValueAt( tableRow, {3}) )
        return true;
}The array can grow or shrink based on the values in it so therefore IF statement will grow or shrink. How can i achieve it?
If not then how can i achieve this?

My understanding (feeble at best) is that a sieries of && elements will be evaluated in order until the first false value is encountered. So, in an "if a && b && c" statement where b is false c will never be evaluated and the conditional executable will not run. Is that what you mean?
Yes, logical expressions will not evaluate unnecessary operands. So you can safely write the following, for instance, without getting an error,
if ((anArray != null) && (anArray.length > 0)) { ... }because the second operand of the '&&' will never be evaluated if 'anArray' is null.
Also, is there a difference between & and &&?
& is a bitwise operator, && is a boolean operator.

Is there an equivalent statement in Java for this PL/SQL stmt?

Hi,
I want to know if there is an equivalent statement
in java for this PL/SQL statement:
IF strTok IN('COM-1','COM-2','COM-3') Then
/* Do Something */
End If;
I tried using : // This is giving me errors..
if (strTok.equals(("COM-1") || ("COM-2") || ("COM-3") ) )
/* Do Something */
The above Java code is giving me errors.
Any Help to reduce the number of steps for comparison
is appreciated.
thanks in adv
Sharath

Something like
if (strTok.equals("COM-1") ||
strTok.equals("COM-2") ||
strTok.equals("COM-3") )Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

Is there a goto statement in java??

is ther a goto statement in java
if yes how is it
and if no wat we use instead of it , if we want to redirect to control flow??
thanking you
rose!!!

But he did not say it with three exclamation
points!!!
yes, I'm trying to restrict my usage of the exclamation mark as part of my attempts to be more even tempered (which aren't succeeding that well, but I may just need more practice).

How to execute a SELECT statement in java??

Hello !!
In my java program , i need to delete a record of number X, so
i accept the number X from the keyboard
Then before deleting it
i want the program to show me the name, age of the record which has the number X
How to do this

hello kylas
actually i didnt get why this program example?? wats
its executing ??? Look at reply #3 in your other thread:
http://forum.java.sun.com/thread.jspa?threadID=713289&messageID=4126346
Notice the similarity? You've now asked "How to delete a record in Java" and "how to execute a select statement in java". You may have noticed that, aside from the SQL and the call to execute and executeUpdate (for delete) it's the same code. This is because you don't so much do these things in Java, you do them in SQL. The Java code simply asks the Driver to execute whatever SQL you write. So, I really hope your next post isn't "how do I execute an UPDATE statement in Java".
Good Luck
Lee

HT5312 I am trying to reset my security questions, I cannot locate the option for a rescue email address with My Apple Id. When I click on the button to reset the security questions, it states it is sending an email to the primay email address, but it doe

I am trying to reset the Security Questions as I have forgotten them, when I have logged into My Apple Id, and click on the button to reset the Security Questions, it states it is sending an email to the Primary Email address. I do not have the option to input a Rescue Email address, the only option I have is to input an Alternate Email address, which I have done so.
Also when I have tried to book an appointment throuth Online Support, I have not successful, I have rung a telephone number provided by the Mac Store in Perth, Australia and the reply provided is that we are closed. I was given to understand that Apple provided 24/7 Support to their users.

Hot N Spicy wrote:
I am trying to reset the Security Questions as I have forgotten them,
Forgotten Security Questions / Answers...
See Here > Apple ID: Contacting Apple for help with Apple ID account security
Ask to speak with the Account Security Team...
Or Email Here > Apple Support iTunes Store Contact
More Info > Apple ID: All about Apple ID security questions
Note:
You can only set up and/or change a Rescue Email Before you forget the questions/answers

Using Google GWT to create (Dashcode) widgets for iBook Author I would like to embed interactive widgets in iBooks using iBookAuthor. The widgets in question started life in Java but GWT has allowed them to be converted to javascript and to run on web pa

I would like to embed interactive widgets in iBooks using iBookAuthor. The widgets in question started life in Java but GWT has allowed them to be converted to javascript and to run on web pages (for example, http://softoption.us/content/node/437 scroll to the bottom). In theory, iBookAuthor can bring in most html5, and much javascript. The technique is to wrap the html in a folder, with 2 extra files, a plist and a default png and then change the extension of the folder to ‘.wdgt’. This is the technique for making Dashboard widgets for the Mac, and Apple even have the Dashcode software to do it. So what you really do is to make a Dashboard widget, then iBookAuthor can import it. So far, so good. And some folk have been doing this, for example http://www.prweb.com/releases/2012/2/prweb9242432.htm http://www.panophoto.org/forums/viewtopic.php?f=64&t=10417&p=158330#p158423 However, if you start with GWT and create a single page with one button and a Hello World, compile it, and get the WAR file (I use Eclipse here)… the Safari browser and others will run it properly (even on an iPad). Then if you wrap it, a proper Dashboard widget is created, which runs properly on a Mac. Then if you go to iBookAuthor and put a custom widget in the Text, then drag it in. It is accepted by the text and shown as being there. However, if you use Preview to look at it on an iPad, it is gone (or was never there in the first place). Anyone any ideas on this? [And iBook Author seems to give no warnings.] The widget is at https://dl.dropbox.com/u/46713473/Test6.wdgt.zip I have bells and whistles that I’d like to get into an iBook!
Thanks for any insights.
Martin

I do have a little to add, which might help someone. Indeed, opening a blank page and dragging the widget straight in seems good in difficult cases. But, actually, I was also able to insert successfully from the Toolbar especially to blank pages. So, it may have been something to do with the columns and stuff like that. Anyway back then the insertion would show in iBooks Author but not in the Preview on the iPad. I moved on to actual Google Web Toolkit output javascript. Basically I had three at hand to try: a Hello World with a button which went straight it, one of moderate complexity, (for example with a built in Lisp interpreter), which also went straight in, and finally a more complex one that initially was rejected by iBook Author. Author complained that there was an unsupported media file (of course, Author does not tell you which one it is, that would be too easy). [Remember, this was a proper working Dashboard widget which could be installed on a Mac]. Among other things I had read remarks about .gif files. When looking through the GWT war directory at the actual javascript etc files, I noticed there were two gifs there one called ‘clear.cache.gif ‘ and a second one called ‘0F89659FF3F324AE4116F700257E32BD.cache.gif’. (Now, there is obfuscation so the numbers here may be different from case to case.) The clear.cache.gif did not seem to be anything special. But the other one is an animation. It is three little boxes that twinkle (rather like a waiting spinning cursor). So, I opened that file and saved it to itself (that picks the top frame of the animation and saves only that, leaving you with an unanimated gif). The resulting widget drags and drops into iBooks Author (and seems to work properly at a quick glance). So, if you are having trouble with ‘unsupported media files’ converting animated gifs into unanimated gifs might help in some cases.

INSERT statement in Java and MS Access

Hi all,
can anyone please tell me how to insert data to an MS Access table using JSP i tried INSERT statement of java but it is getting errors saying INSERT statement is wrong. I have no idea about MS access insert statement. i am totally tired of this. Please someone help me.

Hello,
MS Sql can cause problems where it goes off standard, however I dont think insert is any different.
INSERT INTO table_name (column1, column2) VALUES (variable1, variable2)
Make sure your table and column names are exactly right, Java is case sensitive, so make sure the case is correct also.
The other common error is if you have a required field in the database that is not populated by your program, so, if for instance there was a column3 in the table for the above example, which was a required field, the sql would fail as there is no data being entered for column3.

A question about design of Java Application on java card.

Hi every one,
I have a question about design of Java applet on java card,
There is an application on my card that it is not java card, it include a DF and some EF under DF, I would like to know if I want to have this application on java card ,how can I design DF and EF on java card ,I mean is there any relation between DF,EF with applet and file? for example can I say DF is same as applet and EF is same as file?
I'll appreciate for any help .
yours sincerely,
orchid

hi
you can write a java class for DF.
an instance of DF class have some EF objects.
for example,
samples/com/sun/javacard/samples/JavaPurse/CyclicFile.java
implements ISO 7816 CyclicFile ( EF )
see also:
http://forum.java.sun.com/thread.jspa?threadID=673745&messageID=3936272
best regards,
siavash

Convert SQL statements to JAVA Code ?

Using SQL queries Can I convert SQL statements to JAVA Code ?
Edited by: user11238895 on Jun 7, 2009 10:54 PM
Edited by: user11238895 on Jun 7, 2009 11:12 PM

Me very new to Oracle.
can we convert SQL Queries to JAVA Code using simple built in SQL queries ?
Which SWISS SQL Tool does [Converting SQL Queries to JAVA Code]

NewBee question - Import statements

Hi,
I am new to Bea workshop.
Can someone help me out in how to add my own Import statements in Java classes
created in workshop.
Thanks and Regards,
Nikita

Hi Nikita,
Welcome to Workshop!
The JWS classes used in Workshop are essentially Java classes with the
additional capability to understand the JWS metatags in the comments.
Hence you can use the import statements in the same manner as you use in a
normal Java class.
Please do let us know if you have any further queries.
Regards,
Anurag
Workshop Support
"Nitika" <[email protected]> wrote in message
news:[email protected]..
>
Hi,
I am new to Bea workshop.
Can someone help me out in how to add my own Import statements inJava classes
created in workshop.
Thanks and Regards,
Nikita

How to isolate the Sql Statement from Java Code

Hi
I Need to know that can we segregate the Sql Statements and convert them to Stored Procedures so as to isolate the Sql statements from Java Code.
So i have one static web page which uses four select Statements so what i want is to create a stored procedure encapsulating these queries. So that the Java Web Developer will simply call the Stored Procedure instead of using four different SQL Statements.
Suppose the developer has these four Statements
Select ename,empno,sal,job from emp;
select empno,ename,mgr from emp;
select deptno,dname from dept;
select emp.ename,emp.empno,emp.deptno,dept,dname fromemp,dept;
So can i encapsulate these four Sql Statements in one Procedure and the Web developer can call the Store procedure and dont need to write the Sql Statements in his code.
Can Anybody guide me how to write this Stored type of Store procedure.
Thanks

http://www.google.com/search?q=java+windows+registry
Next time, search yourself. It might be beyond your belief, but you're really, really not the first person to wonder about this.

Question of State of Java RTS

Similar Messages

Maybe you are looking for