drjava-users — DrJava users' discussion

Re: [Drjava-users] Stopping execution? Setting class path in DrJava

[Robert C. <co...@cs...>]

Hi Mark,

I think I can answer one of your questions.  I will leave the others
to my more knowledgeable colleagues (aka graduate students).

Java only finds classes in jar files on the classpath if the jar file itself
is placed on the path.  The directory containing the jar file is
not sufficient.  My understanding is that Java follows this
rule consistently. 

-- Corky

[Drjava-users] Stopping execution? Setting class path in DrJava

[Mark G. <gu...@cc...>]

If one has runaway code (e.g., infinite loop) in DrJava, is there any way 
to stop it (short of aborting the application)?

Setting the class path in DrJava from the Preferences is great -- no 
messing with system/shell variables!  But we have had a few interface 
problems with it:
- I found that I have to select the folder that I want to include from the 
parent folder.  If I enter the desired folder and then select the folder, 
the folder name appears twice in a non-existent path, e.g., "C:\Documents 
and Settings\Mark Guzdial\My Documents\java-code\java-code"
- I have found strange behavior (and maybe this is just Java and not 
DrJava) in that sometimes, I can choose the folder where the .jar files 
live, and other times, I have to select the specific .jar files.  For 
example, I am using the JMusic package with DrJava.  I had to exactly 
specify "D:\jmusic\jmusic.jar" to get DrJava to find the jmusic.jar file, 
but the instruments were find-able with "D:\jmusic\inst\"  I haven't 
figured out when I need to do each.

Thanks!
   Mark


Mark Guzdial, Associate Professor, College of Computing/GVU
http://www.cc.gatech.edu/~mark.guzdial - CSL http://coweb.cc.gatech.edu/csl

[Drjava-users] drjava-20040316-0412 Development Release

[James I-C. H. <jh...@ow...>]

This development release of DrJava includes a large number of bug fixes, a
couple of new features, and an interface improvement.  The new features
improve the usability of the Interactions Pane by automatically inserting
newlines when the interactions is detected to not be complete.  This makes
declaring methods and classes much easier.  Also, typing in the first few
characters of previous commands allows you to hit Tab to search backwards
in history through the commands that begin with those characters.

We are trying to release a beta within a couple of days so please download
and test this release as your primary copy of DrJava, reporting any bugs
you may find (http://drjava.org).

James

Re: [Drjava-users] classpath for the eclipse plugin

[Charles R. <creis@u.washington.edu>]

Hi Andrew--
   I was just going through old emails in my inbox, and I realized 
there's an easy way to add things to the classpath for the Interactions 
Pane in Eclipse.  (I'm surprised I didn't mention it before.)  All the 
classpath entries for the projects you have open are automatically added 
to the Interactions Pane, so just add a classpath entry to a project 
that you have open.  It's not the same interface as in DrJava (where you 
can specify a list of entries to always include in the Interactions 
Pane, regardless of what you have open), but it should be a good 
workaround for the short term.

Hope that helps,
Charlie


Andrew Eisenberg wrote:
> Thanks for your response.  I think this is a really good tool (Corky 
> gave me a demo of it a few days ago).  I do all of my development in 
> Eclipse, but I can't really use DrJava until I can alter the classpath 
> in the eclipse plugin.  I know there would be quite a few people here 
> who'd be interested too once the class path can be set from inside eclipse.
> 
> great work so far,
> --andrew
> 
> 
> 
> 
> Charles Reis wrote:
> 
>> Hi Andrew--
>>   Unfortunately, I don't think it's possible in the current build of 
>> the plug-in (which is still technically a pre-release).  It shouldn't 
>> be too hard to add, though, so we'll try to get the feature in there 
>> soon.
>>
>> Charlie
>>
>> ps--  Neal, Daniel (or somebody): could you post a feature request for 
>> this?
>>
>>
>> Andrew Eisenberg wrote:
>>
>>> Hi,
>>>
>>> How do you set the classpath for the eclipse plugin?
>>>
>>> thanks,
>>> --andrew
>>>
>>>
>>>
>>> -------------------------------------------------------
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>>> 16-19 November in Las Vegas. Learn firsthand the latest
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>>
>>
> 

[Drjava-users] How to use JVM command line options?

[Merrill, A. <Mer...@ca...>]
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aG9vbCwgUG9ydGxhbmQsIE9yZWdvbg0K

[Drjava-users] FileNotFoundException in Dr.Java?

[Weigang G. <go...@ho...>]

<html><div style='background-color:'><DIV class=RTE>
<P>Hi, </P>
<P>I have a simple hellow world program. It accepts a command line argument , which indicate a file name, say file1. The compilation is ok, but when I run it like:</P>
<P>&gt;java main file1</P>
<P>It reported FileNotFoundException. But I did&nbsp;put the file1 in the same directory with the main class. Why Dr.Java can't find it?</P>
<P>&nbsp;</P>
<P>Any suggestion is welcomed.</P>
<P>&nbsp;</P>
<P>Thanks.</P>
<P>Michael<BR></P>
<P><BR>&nbsp;</P></DIV></div><br clear=all><hr>Add photos to your messages with  <a href="http://g.msn.com/8HMBEN/2749??PS=">MSN 8. </a> Get 2 months FREE*.</html>

Re: [Drjava-users] classpath for the eclipse plugin

[Andrew E. <ad...@cs...>]

Thanks for your response.  I think this is a really good tool (Corky 
gave me a demo of it a few days ago).  I do all of my development in 
Eclipse, but I can't really use DrJava until I can alter the classpath 
in the eclipse plugin.  I know there would be quite a few people here 
who'd be interested too once the class path can be set from inside eclipse.

great work so far,
--andrew




Charles Reis wrote:

> Hi Andrew--
>   Unfortunately, I don't think it's possible in the current build of 
> the plug-in (which is still technically a pre-release).  It shouldn't 
> be too hard to add, though, so we'll try to get the feature in there 
> soon.
>
> Charlie
>
> ps--  Neal, Daniel (or somebody): could you post a feature request for 
> this?
>
>
> Andrew Eisenberg wrote:
>
>> Hi,
>>
>> How do you set the classpath for the eclipse plugin?
>>
>> thanks,
>> --andrew
>>
>>
>>
>> -------------------------------------------------------
>> This SF.Net email sponsored by: ApacheCon 2003,
>> 16-19 November in Las Vegas. Learn firsthand the latest
>> developments in Apache, PHP, Perl, XML, Java, MySQL,
>> WebDAV, and more! http://www.apachecon.com/
>> _______________________________________________
>> Drjava-users mailing list
>> Drj...@li...
>> https://lists.sourceforge.net/lists/listinfo/drjava-users
>

Re: [Drjava-users] classpath for the eclipse plugin

[Charles R. <creis@u.washington.edu>]

Hi Andrew--
   Unfortunately, I don't think it's possible in the current build of 
the plug-in (which is still technically a pre-release).  It shouldn't be 
too hard to add, though, so we'll try to get the feature in there soon.

Charlie

ps--  Neal, Daniel (or somebody): could you post a feature request for this?


Andrew Eisenberg wrote:

> Hi,
> 
> How do you set the classpath for the eclipse plugin?
> 
> thanks,
> --andrew
> 
> 
> 
> -------------------------------------------------------
> This SF.Net email sponsored by: ApacheCon 2003,
> 16-19 November in Las Vegas. Learn firsthand the latest
> developments in Apache, PHP, Perl, XML, Java, MySQL,
> WebDAV, and more! http://www.apachecon.com/
> _______________________________________________
> Drjava-users mailing list
> Drj...@li...
> https://lists.sourceforge.net/lists/listinfo/drjava-users

[Drjava-users] classpath for the eclipse plugin

[Andrew E. <ad...@cs...>]

Hi,

How do you set the classpath for the eclipse plugin?

thanks,
--andrew

[Drjava-users] drjava-20030624-1641 released

[James I-C. H. <jh...@ow...>]

  This is a new development release of DrJava that includes a great deal
of bug fixes and a new license change. DrJava is no longer under the GPL
license, but instead under our custom "DrJava Open Source License". This
change was made primarily because we realized that we bundle code that is
not ours and is not under the GPL (e.g. JUnit), prohibiting us from
legally using it. You can read about the details of the new license online
at drjava.org or in the About dialog in DrJava.  Please download and test
this release as your primary copy of DrJava at http://drjava.org.

Thanks,
James

[Drjava-users] DrJava Stable Release

[James I-C. H. <jh...@ow...>]

   A new stable version of DrJava, drjava-stable-20030822, has just been
released!  This version includes new features, along with numerous bug
fixes and usability improvements.  The most notable changes include
the ability to test all open JUnit tests, easily run the main method of a
class, find and replace across all open documents, and load a history file
as a script that can be executed one line at a time.

   Please download this version from http://drjava.org and use it as
your primary copy of DrJava.  We welcome any feedback you have on this
release; please submit any suggestions or difficulties as feature
requests and bug reports on our SourceForge site.

Thanks!
James Hsia

[Drjava-users] drjava-20030812-2156

[James I-C. H. <jh...@ow...>]

  We've just put up a development release of DrJava, which includes the
ability to load a history file as a script that can be executed one
interaction at a time, the ability to find/replace across all documents, a
few bug fixes, interface upgrades, and usability improvements.

  We're aiming for a beta release at the end week, so please download this
release and give it a try in your environment in the next couple of days,
letting us know if you encounter any bugs.  You can download it from the
"more download options" link at:
http://drjava.org

James





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[Drjava-users] drjava-20030805-2214

[James I-C. H. <jh...@ow...>]

  We've just put up a development release of DrJava, which includes a
significantly improved JUnit testing interface, a new "Test All" feature
which will test all currently open JUnit tests, the ability to run a
document's main method, a few bug fixes, interface upgrades, and
usability improvements.

  We're aiming for a beta release sometime next week, so please download
this release and give it a try in your environment, letting us know if you
encounter any bugs.  You can download it from the "more download options"
link at:
http://drjava.org

James

[Drjava-users] DrJava Stable Release

[Charles R. <cr...@ri...>]

   A new stable version of DrJava, drjava-stable-20030724, has just been 
released!  This version includes the major features developed this 
spring by the students of Rice's Comp 312 (Program Engineering) course, 
along with numerous bug fixes and usability improvements.  The most 
notable changes include the ability to use the Interactions Pane in the 
scope of a suspended method call in the Debugger, the ability to 
generate Javadoc HTML from source files, the ability to read input from 
System.in, and the ability to use generic types in the Interactions Pane.

   Please download this version from http://drjava.org and use it as 
your primary copy of DrJava.  We welcome any feedback you have on this 
release; please submit any suggestions or difficulties as feature 
requests and bug reports on our SourceForge site.

Thanks!
Charlie Reis

[Drjava-users] DrJava Release Candidate

[Charles R. <cr...@ri...>]

   The DrJava developers have completed a large number of significant bug 
fixes and usability improvements since drjava-beta-20030710, notably 
including a new user interface for the Javadoc feature.  Given the 
magnitude of these changes, we feel it's important to provide a release 
candidate (drjava-beta-20030722) before making the next stable release 
available.  This allows you to download and try out the new features to 
ensure they work correctly in your environment, and to submit any new bugs 
that you find.  If no new issues are encountered, this will become the 
stable release in about 2 or 3 days.

   Please download this release from http://drjava.org and try it out!  A 
list of the new changes can be found in the release notes:
http://sourceforge.net/project/shownotes.php?release_id=173095

Thanks for your help with DrJava!
Charlie Reis

[Drjava-users] Updated DrJava Beta Release

[Charles R. <cr...@ri...>]

  The TeachJava 2003 workshop is currently underway at Rice University
(http://teachjava.org), and we are actively receiving and responding to
feedback from the workshop participants to improve DrJava.  As a result,
an updated beta release of DrJava, drjava-beta-20030710, is now available
from http://drjava.org.  This release includes many bug fixes and
usability improvements, including type checking bugs in the Interactions
Pane and several enhancements to the debugger.

  We will continue to receive feedback in TeachJava through the end of the
week, with the goal of producing a high quality stable release next week.
Please be sure to download and test this updated beta in your environment
to ensure that no new problems have been introduced.  Thanks for your help
with DrJava!

Charlie Reis

[Drjava-users] DrJava Beta Release

[Charles R. <cr...@ri...>]

  We have just released drjava-beta-20030701, a beta release in
preparation for the next stable release of DrJava.  This version contains
all of the improvements and bug fixes from the recent development
releases, written primarily by the students of Rice University's Comp 312
(Program Engineering) course.  Among many other changes, these new
features include support for using the Interactions Pane in the context of
a breakpoint in the debugger, support for generating Javadoc
documentation, support for generic types in the Interactions Pane, and
support for reading input from System.in.  A significant number of bugs
have also been fixed in recent releases.

  This beta release will serve as the basis for the next stable release of
DrJava, which will be available in about two weeks.  We encourage you to
download and extensively use this release, submitting any bugs that you
find.  We appreciate your help in making DrJava as stable as possible!

You can download the beta from our home page:
http://drjava.org

Thanks,
Charlie Reis

[Drjava-users] drjava-20030627-1927

[Charles R. <cr...@ri...>]

   We've just put up a development release of DrJava, which includes 
significantly improved Javadoc features (such as the ability to specify 
custom parameters in the Preferences window), re-enabled support for 
generic types in the Interactions Pane, and tool tips for each option in 
the Preferences.

   This will likely be the last development release before the upcoming 
beta release, so please download it and give it a try in your 
environment, letting us know if you encounter any bugs.  You can 
download it from the "more download options" link at:
http://drjava.org

Charlie

[Drjava-users] DrJava Plug-in for Eclipse

[Charles R. <cr...@ri...>]

The first milestone release for the DrJava Plug-in for Eclipse is now 
available at http://drjava.org!  Eclipse is an open source IDE developed 
by IBM, and our new plug-in provides it with an Interactions Pane and a 
simplified user interface.  Future versions of our plug-in will 
integrate Eclipse's debugger with the Interactions Pane to allow users 
to interact with programs at a breakpoint.

For more information, follow the Eclipse Plug-in link on http://drjava.org.

Charlie Reis

Re: [Drjava-users] Keyboard Input with the Interactions window

[Marcelo de G. M. <mg...@th...>]

Hello,

> This is great news! IMHO, The ability to read from stdin was the
> major feature lacking in DrJava.

At first I thought this was a stumbling block for the traditional
introduction to programming, but I found a neat class that was even
easier for the students than the standard input mechanism (which
includes some validation):

  http://cs.joensuu.fi/pages/ageenko/teaching/OOP/labs.htm

Paulo, I've translated that to Portuguese, if you're interested...

Thank you to all for this great tool!

  Marcelo

Re: [Drjava-users] Keyboard Input with the Interactions window

[Paulo J. da S. e S. <rs...@im...>]

Hi,

This is great news! IMHO, The ability to read from stdin was the major
feature lacking in DrJava. Now, it really seems that DrJava is the
perfect tool for our introductory Computer Science course. 

Great work, Charles!

Paulo
-- 
Paulo José da Silva e Silva 
Professor Assistente do Dep. de Ciência da Computação
(Assistant Professor of the Computer Science Dept.)
Universidade de São Paulo - Brazil
e-mail: rs...@im...           Web: http://www.ime.usp.br/~rsilva

Teoria é o que não entendemos o     (Theory is something we don't)
suficiente para chamar de prática.  (understand well enough to call
practice)

Re: [Drjava-users] Keyboard Input with the Interactions window

[Charles R. <cr...@ri...>]

  We have just added support for reading input from System.in in the
drjava-20030529-2239 development release.  The program you mention below
will now direct the user to enter input into the Console tab, which
becomes editable when input is requested from System.in.  Please give it a
try and let us know what you think!

  You can download the release from the "more download options" link on
http://drjava.org.

Thanks,
Charlie Reis


On Mon, 30 Sep 2002, Carl Pulley wrote:

> Dear all,
>    I'm having problems using some code to simplify keyboard input for my
> students (Dr.Java version 20020814-0343; JDK 1.3.1; OS Mac OSX 10.2.1 -
> reported problems are also verified on a Solaris setup).
>
>    The code I'm using is as follows:
>
> public class read {
>
>    static public int getInt(String prompt) {
>      System.out.print(prompt);
>      BufferedReader In = new BufferedReader(new
> InputStreamReader(System.in));
>      while (true) {
>        try {
>          System.out.print("[GetInt]");
>          String s = (In.readLine()).trim();
>          int y = (new Integer(s)).intValue();
>          return y;
>        } catch (Exception e) {
>          System.out.println("Incorrect input format, please enter again:
> ");
>        }
>      }
>    }
>
> }
>
>    and the following is typed into the interactions pane:
>
> int x = read.getInt("enter: ");
>
>    The result is that Dr.Java hangs with a spinning wrist watch.
>
>    As far as I can tell, the problem seems to be that my code is
> assuming that keyboard input will be derived from the System.in stream.
> I guess that Dr. Java assumes that keyboard input derives from an
> alternative stream?
>
>    Any help with this one or alternative code for simplifying keyboard
> input is greatly appreciated.
>
>    Many thanks in advance,
>
>      Carl.
>
> --
> Dr. Carl Pulley (Lecturer)
> School of Computing and Mathematics,
> University of Huddersfield,             email: c.j...@hu...
> Huddersfield                            WWW:
> http://scom.hud.ac.uk/scomcjp
>
>
>
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>

[Drjava-users] Features for teaching

[Greg W. <Gre...@ba...>]

Hi, everyone.  I am a DrJava newbie, but a colleague
(Paul Gries) at the University of Toronto is going to
start using it in the first-year course this fall, and
I am looking at its suitability for a second-year
course on software development.  (I've included a list
of the course's lecture titles at the end of this
message to give a flavor for what the course is about.)

Based on what I've seen so far, I would like to see
the following features in DrJava.  I realize everyone's
needs are different, and that DrJava is meant to be
small and simple, so before I start filing tons of RFE's
I would be interested in other people's feedback.  Would
your students ever use these features?  Would they
understand them?  And so on...

Thanks,
Greg

1. On-the-fly configuration

Many of the examples and programming projects in CSC207
have their own requirements for CLASSPATH.  Currently,
DrJava manages this globally.  Charlie Reis has said
that it wouldn't be that big a thing to allow DrJava
to re-load its settings (from .drjava files) on the fly,
so that users could switch from one set to another more
easily.

2. Reaching through to Ant

CSC207's examples and assignments currently use Make,
rather than Ant.  Partly, this is because the course
spends three lectures showing students how to build
Make (which motivates text file parsing, some simple
graph algorithms, and a few other things).  I also use
Make to manage tests, so that "make test014" builds
software (if necessary) and then runs a particular
test case.  I would like to be able to "reach through"
DrJava to the underlying Ant build files and do these
sorts of things; I would also like to use the Ant
files as a (kind of) "project" file, so that students
could work on multi-directory projects (which they
ought to be doing in a second-year course).

3. Version control

I tell my students in CSC207 that a version control
system should be their third tool after an editor
and compiler --- it's even more important than a
symbolic debugger.  I would really like to see DrJava
integrate somehow with version control, so that (for
example) the editing pane can show diffs, and be used
for writing log messages when checking files in.  If
this is done, I would personally prefer to see it done
with a modern version control system like Subversion,
which has transactions and versioned meta-data, for
the same reason that I prefer students to learn Ant
rather than Make.

Thanks very much in advance for your feedback,

Greg Wilson

------------------------------------------------------

CSC207 Topics

- Introduction
- Version Control
- Introducing Make
- Parsing Text Files
- Working With Graphs
- Building Make
- Specification
- Systematic Testing
- Unit Testing
- Debugging
- Analysis & Estimation
- Logging
- The Document Object Model
- Reflection
- Configuring Software [1]
- Design Patterns
- Refactoring
- Introducing Python [2]
- Python Sequences
- Python Dictionaries and Functions
- Object-Oriented Python
- Regular Expressions
- Persistence
- Comparing Object Models
- Looking Forward

[1] This lecture builds on what students have learned
    about working with XML, and about dynamic class
    loading and invocation, by showing them how to
    create a configuration system for a logging utility
    that specifies class names and parameters in XML.

[2] This course teaches Python both so that they have
    another tool in their toolbox (one that's better
    suited to systems programming than Java), and so
    that they can see how fundamental ideas recur in
    all languages.  It also allows us to compare the
    languages' object models, so that they can see
    that languages are designed, and can be analyzed
    and critiqued, like other software.


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[Drjava-users] DrJava Stable Release

[Charles R. <cr...@ri...>]

  A new stable version of DrJava has just been released.  This release
includes most of the improvements from the recent development releases,
along with several bug fixes since last week's beta release.  Some of the
more notable changes are that the debugger is now always available
(without having to specify tools.jar on the command line) and that DrJava
can use the new Java 1.4.1 for Mac OX X.  Many other improvements have
been added by students in Rice's Comp 312 course on Program Engineering.

  Please be sure to use this version as your primary copy of DrJava.  We
welcome any feedback you have through our feature requests and bug reports
on our SourceForge site.

Thanks!
Charlie Reis

[Drjava-users] DrJava Beta Release

[Charles R. <cr...@ri...>]

  We have just released a beta version of DrJava containing all of the new
features and bug fixes from the recent round of development releases.
This release will be the basis for the next stable release of DrJava, so
we strongly encourage you to download it and let us know if you encounter
any bugs in your environment.

  One of the most notable changes since the previous stable is that the
debugger is now always available, and DrJava does a better job finding
tools.jar on Windows platforms.  Other changes include improved undo
support and a significant number of bug fixes.

  Please submit any problems that you have with this release.  Depending
on the feedback we receive, we will release the corresponding stable
release in about a week.  Thanks for your help with DrJava!

Charlie Reis