drjava-users — DrJava users' discussion

[Drjava-users] Current document is out of sync with the Interactions Pane and should be recompiled!

[Kevin R. B. <kbu...@at...>]

I struggled with getting DrJava to work.  It was used in a course I was
planning to take.  I worked a lot time to figure out how to get DrJava
to work, and I see that a number of other people over the years have
had basically the same problem, and they don't always seem to get
answers, so I figured blasting this information out on the mailing
list might be helpful if it makes one more place people have a
chance of finding something helpful.

In my case, I am using a Linux system that has both OpenJDK and a
manually installed Oracle JDK (extracted from a tarball obtained from
java.com), along with some other JRE environments in various places.
That said, I think basically the things I found might not necessarily
entirely be platform-specific even if some of the details are, so I
hope that even if a reader doesn't use Linux, if they read between
the lines, so to speak, something worth trying might become evident.

In any event, I "installed" DrJava by .jar file rather than by
the installer (`DrJava Version : drjava-20190813-220051`). I ran it
from the command-line `java -jar drjava-beta-20190813-220051.jar`.
I then clicked `[ Manual Download ]` when it asked about installing
updates (`drjava-beta-2019-220051`).

DrJava reported that my compiler was `JDK 8.0_222`.  Note, I don't know
where that compiler came from.  As far as I know, I didn't have that
version installed. My OpenJDK was:

    $ /bin/java -version
    openjdk version "1.8.0_252"
    OpenJDK Runtime Environment (build 1.8.0_252-b09)
    OpenJDK 64-Bit Server VM (build 25.252-b09, mixed mode)

I typed in a simple "Hello World" program, and every attempt to compile
produced:

    Compiler Output:
      "Compilation completed."

This is a bug, because in fact compilation apparently did not complete.

Clicking `Run` produced:

    Interactions
      Welcome to DrJava.  Working directory is
    /home/krb/Projects/Software/java Current document is out of sync
    with the Interactions Pane and should be recompiled! > 

Restarting DrJava, saving, clicking `Reset`, etc., would not clear the
problem.

In any event, at some point I noticed the Console tab was full of
messages like:

    Console
      Compiler is using classPath = '[/home/krb/Projects/Software/java,
    /home/apps/drjava/drjava-beta-20190813-220051.jar]';  bootClassPath
    = 'null' Fatal Error: Unable to find package java.lang in classpath
    or bootclasspath

At this point, I tried various things, but I focused on pointing DrJava
to an Oracle Java JDK I had installed a few days ago.  Everything I did
was in `Edit | Preferences ... | Resource Locations`, though I beat
around in there a while.  All of the settings were "blank" before I
started.  Anyway, I eventually had some success after I'd set:

    Web Browser
     /usr/lib64/firefox/firefox
    Web Browser Command
   
    Tools.jar Location
      /home/raid/apps/oracle/jdk-1.8.0_251/jre/lib/tools.jar
    Display All Compiler Version [ ]
    Extra Classpath
      /home/raid/apps/oracle/jdk1.8.0_251/jre/lib
      /home/raid/apps/oracle/jdk1.8.0_251/lib

> NOTE:  Your PATHs will NOT be the same as mine!  You need to use the
> actual paths on your system.  In my case I searched for "rt.jar" and
> "tools.jar" that were obviously in folders related to an installed
> JDK.

At this point I decided to try to figure out the minimum required to
get it working.  After a lot of fiddling around, I found it is
sufficient just to set `Preferences | Resource Locations | Tools.jar
Location`, but ***with with one MAJOR caveat.  You must BROWSE to the
file using that dialog.  YOU CANNOT JUST PASTE IN THE PATH!***  If you
just paste in the path, it can look like it is set correctly, but the
compiler will continue to not work.  This was how I got the oracle jdk
compiler to work.

Next, I set about to see if I could get OpenJDK to work.  I searched my
entire system for another `tools.jar` that belonged to OpenJDK, and did
not find one.  Then I realized I did not have the DEVEL OpenJDK package
installed (on Mageia Linux 7).

    java-1.8.0-openjdk-headless-1.8.0.252-1.b09.1.mga7
    java-1.8.0-openjdk-1.8.0.252-1.b09.1.mga7

I installed:

    java-1.8.0-openjdk-devel-1.8.0.252-1.b09.1.mga7

Now, even after resetting defaults, DrJava no longer says it is using
`JDK 8.0_222`, but rather `JDK
8.0-openjdk-1.8.0.252-1.b09.1.mga7.x86_64-OpenJDK`, and everything
works fine with NO customization to preferences!

I don't know where the heck `JDK 8.0_222` came from.  There's nothing
on my system with that version.  I rather suppose it is some internal
thing in DrJava.  I think the takeaways are:

* If DrJava says its using `JDK 8.0_222`, it probably is not going to
  work!
* Make sure you actually have a `tools.jar` installed if your system
  might split up the OpenJDK installation.
* Point `Tools.jar Location` to an existing `tools.jar` file where the
  JDK you are using is installed, and making sure to browse to it (not
  just paste in a path).

[Drjava-users] New Beta Release of DrJava

[Corky C. <cor...@gm...>]

Dear DrJava Users:

We have made a new beta version available: 2019-220051.txt that
incorporates the OpenJDK 8 Java compiler.

You can download it from the DrJava website at http://drjava.org/ or
from SourceForge.net by following this link:
https://sourceforge.net/projects/drjava/


-- Your DrJava Development Team

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[Drjava-users] Can't create/comment on feature requests on Sourceforge

[Christopher C. <chr...@gm...>]

After logging into Sourceforge I notice that I cannot create or
comment on feature requests (I have to be "authorized by the project
admin"), even though I can do the same for bugs and support requests.
Not sure if this is intentional, nor how long this has been the case,
since I've never tried doing so before.

Christopher Chavez

[Drjava-users] beta DrJava.app and Java 6

[Kevin W. <wayne@CS.Princeton.EDU>]

Glad to hear the news about the new beta!

Could you clarify how the Mac OS X app will work? In the past, DrJava.app required Apple Java 6 to launch; the summary below says that Java 6 compatibility has been dropped. In particular, when I double click the beta DrJava.app, I get the following Console error, which suggests that DrJava.app can't be launched with Apple Java 6:

    edu.rice.cs.drjava.DrJava: java.lang.UnsupportedClassVersionError: edu/rice/cs/drjava/DrJava : Unsupported major.minor version 51.0

Launching DrJava from the Terminal with "java -jar drjava-beta-20160913-225446.jar" works fine (Oracle Java 8 is my default).

Thanks in advance for any information!

Best,
Kevin

> We have made a new beta version available: drjava-20160913-225446.
> 
> Download at http://drjava.org.
> DrJava is a lightweight programming environment for Java designed to foster test-driven software development. It includes an intelligent program editor, an interactions pane for evaluating program text, a source level debugger, a unit testing tool, and a new code coverage tool.
> In addition to bug fixes, this beta release includes two new features introduced since the last stable release:
> 	• The new Toolbar button labeled "Coverage" runs all of your unit tests (just like the "Test" button) and determines the code coverage (branches and statements) of these unit tests using Jacoco code coverage tool. It generates and displays pages with links reporting the code coverage of your unit tests.
> 	• In the "Edit preferences" menu, the Fonts pane includes two new options: "MenuBar Font" and "ToolBar Font". The MenuBar Font option also controls the font in tab labels in the Tabbed Pane (including "Interactions" and
> "Find/Replace" among other tabs) below the Definitions window.
> Note: Java 6 compatibility has been dropped. To use DrJava, you will need Java 7 or newer.
> Bug fixes since the last stable release:
> We have tried to fix some minor bugs some of which have been introduced in recent versions of DrJava. Please report bugs that you encounter using the SourceForge bug reporting and tracking system. We have very limited resources but we will try to address major bugs as quickly as possible and minor bugs that are easy to fix before the next release.
> Best,
> Robert "Corky" Cartwright
> DrJava Project Director​


Kevin Wayne
Phillip Y. Goldman '86 Senior Lecturer
Department of Computer Science
Princeton University

[Drjava-users] New Beta Release of DrJava

[Corky C. <co...@ri...>]

​Dear DrJava Users:

We have made a new beta version available: drjava-20160913-225446.

Download at http://drjava.org.

DrJava is a lightweight programming environment for Java designed to foster
test-driven software development. It includes an intelligent program
editor, an interactions pane for evaluating program text, a source level
debugger, a unit testing tool, and a new code coverage tool.

In addition to bug fixes, this beta release includes two new features
introduced since the last stable release:

   1.

   The new Toolbar button labeled "Coverage" runs all of your unit tests
   (just like the "Test" button) and determines the code coverage (branches
   and statements) of these unit tests using Jacoco code coverage tool. It
   generates and displays pages with links reporting the code coverage of your
   unit tests.
   2.

   In the "Edit preferences" menu, the Fonts pane includes two new options:
   "MenuBar Font" and "ToolBar Font". The MenuBar Font option also controls
   the font in tab labels in the Tabbed Pane (including "Interactions" and
   "Find/Replace" among other tabs) below the Definitions window.

Note: Java 6 compatibility has been dropped. To use DrJava, you will need
Java 7 or newer.

Bug fixes since the last stable release:

We have tried to fix some minor bugs some of which have been introduced in
recent versions of DrJava. Please report bugs that you encounter using the
SourceForge bug reporting and tracking system. We have very limited
resources but we will try to address major bugs as quickly as possible and
minor bugs that are easy to fix before the next release.

Best,

Robert "Corky" Cartwright

DrJava Project Director​

[Drjava-users] They kill with wars, alcohol and abortions. Save us!!!

[Iam H. <man...@tt...>]

They kill with wars, alcohol and abortions. Save us!!!

[Drjava-users] All In One IDE

[Satyanarayanmurti K. <kss...@gm...>]

Dear Team,

I am using your DrJava IDE for Java Programming. I like Java programming. I
want an IDE like Dr Java is, for all programming languages with compiler
like  C/C++, Assembly, Pascal, Ada, Java, Javascript, HTML5, etc, in which
users can do programming and testing for all Programming languages in one
platform and even create ".EXE" file too. The IDE should select the
compiler depending on the file Extension or by selecting programming
language from menu.
Because now a days there are so many programming languages are available,
people had shuffle between all. If it in one IDE platform, than it will be
more useful and better.


Best Regards & Thanx,
K. Satya

[Drjava-users] European Company Network 2015/2016

[European C. N. <reg...@ec...>]

Madam/Sir,

In order to have your company inserted in the European Company Network for 2015/2016, please print, complete and submit the attached form (PDF file) to the following address:

EUROPEAN COMPANY NETWORK
PO BOX 3079
3502 GB UTRECHT
THE NETHERLANDS

Fax: +31 205 248 107

You can also scan the completed form and attach it in a reply to this email.

Updating is free of charge!

[Drjava-users] .java~ File Extension

[Bob H. <bob...@gm...>]

How does this file type get generated and what relation is it to the .java
file?

Thanks!

[Drjava-users] New Stable Release of DrJava

[Corky C. <cor...@gm...>]

Dear DrJava Users:

We have made a new stable version available: drjava-stable-20140826-r5761

You can download it from the DrJava website at http://drjava.org/
or from SourceForge.net by following this link:
https://sourceforge.net/projects/drjava/files/1.%20DrJava%20Stable%20Releases/drjava-stable-20140826-r5761/

You received this email because you have subscribed to a DrJava mailing list.

[Drjava-users] DrJava and Java 8

[Adam H. <ad...@pr...>]

Folks,


I manage the public labs for Providence College.  I'm working with CS Faculty to try and update Java to Java 8, but our Physics Department uses DrJava.  When running drjava-20130901-r5756 with JDK 8.0_5 we're getting the same error that's detailed here:


 http://stackoverflow.com/questions/23007023/drjava-cannot-run-code-using-jdk8-0


Is DrJava compatible with Java 8, and is there a workaround for this?


Thank you,


Adam Hauerwas?

[Drjava-users] New DrJava Stable Release

[Corky C. <cor...@gm...>]

Dear DrJava Users:

We have made a new stable version available: drjava-stable-20130901-r5756

You can download it from the DrJava website at http://drjava.org/
or from SourceForge.net by following this link:
https://sourceforge.net/projects/drjava/files/1.%20DrJava%20Stable%20Releases/drjava-stable-20130901-r5756/

You receive this email because you have subscribed to a DrJava mailing list.

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

DrJava is a lightweight programming environment for Java designed to
foster test-driven software development. It includes an intelligent
program editor, an interactions pane for evaluating program text, a
source level debugger, and a unit testing tool.

In addition to bug fixes, this stable release
includes a number of new features introduced after the last
stable release:

Note: Java 5 compatibility has been dropped. To use DrJava, you will
need Java 6 or newer.

New features since the last stable release:
 - DrJava is now compatible with Java 8 and perhaps with future editions
   of Java.

Bug fixes since the last stable release:
 - DrJava correctly finds and labels Oracle JDK 7 compilers on Mac OS X.

NOTE: Newer releases of Mac OS X include a gatekeeper that will not run
unlicensed applications like DrJava unless you explicitly open DrJava by
"right" (control-key) clicking on the DrJava icon and executing the
"Open" command.  After you manually open DrJava once, Mac OS X remembers
that it should be allowed to run and will open DrJava normally like
other applications.  Most open source applications like DrJava will not
be licensed on Mac OS X because Apple charges a fee for this service.

[Drjava-users] A new stable release of DrJava (20120818-r5686$) has been uploaded to Sourceforge

[Corky C. <cor...@gm...>]

Dear DrJava Users:

We have made a new stable version available: drjava-stable-20120818-r5686.
This release supports Java 7; it is very similar to the previous beta release,
drjava-beta-20110822-r5448

You can download it from the DrJava website at http://drjava.org/
or from SourceForge.net by following this link:
http://sourceforge.net/projects/drjava/

You received this email because you have subscribed to a DrJava mailing list.

-- Corky Cartwright
   Professor

[Drjava-users] Please add me to the mailing list.

[nelom S. <nel...@gm...>]

Regards,
Nelom

[Drjava-users] How to build the source code...

[John B. <pud...@ho...>]

Hello, are there any instructions available on how to setup the drjava build environment. I'd like to add code to implement an option to save options to an INI file instead of the registry, so as to make drjava portable.

Thanx in advance for any replies,
John Bonifas


 		 	   		  

[Drjava-users] New Beta Release of DrJava

[Corky C. <co...@ri...>]

Dear DrJava Users:

We have made a new beta version available:drjava-beta-20110822-r5448

You can download it from the DrJava website at http://drjava.org/
or from SourceForge.net by following this link:

http://sourceforge.net/projects/drjava/files/1.%20DrJava%20Stable%20Releases/drjava-beta-20110822-r5448/

You receive this email because you have subscribed to a DrJava mailing list.

-- Robert "Corky" Cartwright

[Drjava-users] Can't Get Dr. Java to See Debugger

[Gary F. <fur...@gm...>]

Setup:
Windows 7 64b
Java 1.6_0.27 32b
Latest Dr. Java windows exe run as administrator (seems to work better that
way)

Problem:
The debugger page says that there is no debugger installed, even though the
other page had no trouble finding the Java tools.jar from my 1.6 JDK. How do
I get it to know the debugger is there?

Re: [Drjava-users] Can't Get Dr. Java to See JVM.

[Gary F. <fur...@gm...>]

I solved my own problem. I removed the 1.7 jvm and went for the latest 1.6
and everything is fine.

Gary Furash, MBA | fur...@gm... | 520-907-2470 | @furashgf (twitter)
| http://gfurash.blogspot.com

-----Original Message-----
From: Furash, Gary F - (furashg) [mailto:fu...@em...] 
Sent: August 18, 2011 02:17 PM
To: drj...@li...
Subject: Can't Get Dr. Java to See JVM.

When I start Dr. Java, either using the windows EXE or by using a bat file
to start the jar using the JVM I want (the java 7 jvm), the program starts,
but only allows use of the built in eclipse compiler. Both Cygwin and DOS
have no trouble seeing the jvm. I've gone in and told the app where
tools.jar is, but it doesn't change anything.

[Drjava-users] Can't Get Dr. Java to See JVM.

[Furash, G. F - (furashg) <fu...@em...>]

When I start Dr. Java, either using the windows EXE or by using a bat file to start the jar using the JVM I want (the java 7 jvm), the program starts, but only allows use of the built in eclipse compiler. Both Cygwin and DOS have no trouble seeing the jvm. I've gone in and told the app where tools.jar is, but it doesn't change anything.

Re: [Drjava-users] quotes on printing

[Bigger P. G. <big...@ya...>]

Dear Manager:
I take the liberty of writing to you in the hope of establishing reliable and long-term business relations with you in the printing line.
 
We are a full service books printing and paper products Printing company located in Shanghai, China. 
Not only high in quality but also competitive in price. we are willing to send you the quotation upon receipt of your specific enquiries and then you 
will see how superior our prices are,please kindly help me to forward this note along to your production department, or the person/people responsible for purchasing your print needs.

We sincerely hope we can be your business partner or of some help, to know more about us, please feel free to contact us.,we are always waiting here to serve you well.

looking forward to hearing from you soon.
 
Thanks and best regards 
Bigger Printing Group Ltd
Addr: #78 Building 1985,Chunshen Rd,Minhang Dist,Shanghai 200237, China.
sa...@bi...
www.biggerprintinggroup.com

Note:Please kindly reply to sa...@bi...,our sales presentative will serve you well.

[Drjava-users] Urgent notice of Intellectual Property protection

[John <joh...@yg...>]

Dear Manager:
This email is from China domain name registration center, which mainly deal with the domain name registration and dispute internationally in China and Asia.
On May 23rd 2011, We received HAITONG  company's application that they are registering the name " concutest " as their Internet Keyword and " concutest .cn "、" concutest .com.cn " 、" concutest .asia "domain names etc.., It is China and ASIA domain names. But after auditing we found the brand name been used by your company. As the domain name registrar in China, it is our duty to notice you, so I am sending you this Email to check. According to the principle in China, your company is the owner of the trademark, In our auditing time we can keep the domain names safe for you firstly, but our audit period is limited, if you object the third party application these domain names and need to protect the brand in china and Asia by yourself, please let the responsible officer contact us as soon as possible. Thank you!
Best regards,
John 
Oversea marketing manager  
Shanghai Office (Head Office) 
3002, Nanhai Building, No. 854 Nandan Road, 
Xuhui District, Shanghai 200070, China 
Tel: +86 216191 8696 
Fax: +86 216191 8697 
Web: www.ygnetwork.com.cn

[Drjava-users] DrJava Development Release 20110205-r5425

[Mathias R. <mgr...@ri...>]

Dear DrJava Users:

We have made a new development version available: drjava-20110205-r5425/

You can download it from the DrJava website at http://drjava.org/
or from SourceForge.net by following this link:

https://sourceforge.net/projects/drjava/files/2.%20DrJava%20Development%20Releases/drjava-20110205-r5425/

You receive this email because you have subscribed to a DrJava mailing list.

Available for download at http://drjava.org  .

DrJava is a lightweight programming environment for Java designed to
foster test-driven software development. It includes an intelligent
program editor, an interactions pane for evaluating program text, a
source level debugger, and a unit testing tool.

In addition to bug fixes, this development release includes a number
of new features introduced after the last stable release:

The language level facility has been changed to consist of two
language levels, Functional Java (corresponding to the old
Intermediate level) and Full Java. The old files can still be
compiled, but DrJava will ask if it should rename .dj0 and .dj1
to .dj and .dj2 files to .java.

DrJava's compiler support has been improved, and DrJava now supports
compiling files with file extensions other than .java, .dj, .dj0,
.dj1, and .dj2. This includes support for Habanero Java .hj files,
provided the Habanero Java compiler is installed.

DrJava preferences like indent level can now be stored on a per-
project basis (see "Project Properties", "Advanced").

Note: Java 1.4 compatibility has been dropped. To use DrJava, you will
need Java 5 or newer.


New features since the last stable release:
 - refactored language levels
 - improved compiler support, including support for Habanero Java
 - The contents of the Compiler Errors pane can now be copied to
   the clipboard.
 - DrJava preferences like indent level can now be stored on a
   per-project basis (see "Project Properties", "Advanced").


Bug fixes since last stable release:
 - Applet viewer not started in event thread anymore to avoid
   exception
 - Static type checking for primitive casts in Interactions pane

[Drjava-users] DrJava Updated Stable Release 20100913-r5387

[Mathias R. <mgr...@ri...>]

Dear DrJava Users:

We have made an updated stable version available: drjava-stable-20100913-r5387

You can download it from the DrJava website at http://drjava.org/
or from SourceForge.net by following this link:

http://sourceforge.net/projects/drjava/files/1.%20DrJava%20Stable%20Releases/drjava-stable-20100913-r5387/


You receive this email because you have subscribed to a DrJava mailing list.

Available for download at http://drjava.org  .

DrJava is a lightweight programming environment for Java designed to
foster test-driven software development. It includes an intelligent
program editor, an interactions pane for evaluating program text, a
source level debugger, and a unit testing tool.

This stable release represents an update to the previous stable
release, providing a bug fix for three issues that proved to be
inconvenient for users.

Note: Java 1.4 compatibility has been dropped. To use DrJava, you will
need Java 5 or newer.


Bug fixes since last stable release:

 - The "Smart Run" feature properly runs a main method in a class
   first, and it does not attempt to call a zero-parameter constructor
   of a class if it does not exist.

 - The Apple Java 6 Developer Preview 6 (javase6release1dp6.dmg) is
   excluded as Java 6 JDK, as it does not contain a Java 6-compatible
   compiler. This caused NullPointerExceptions in rare cases.

 - On Linux systems with Java 5 or older, Metal is the default
   look-and-feel again. The system look-and-feel turned out to be
   awful.


Note: These patches were applied to the previous stable release
in a branch. Even though this release has revision 5387, other
features, like Habanero Java integration, are not yet included.
They will be contained in an upcoming development release.

[SourceForge.net Release] drjava : 1. DrJava Stable Releases

Project: DrJava  (drjava)
Package: 1. DrJava Stable Releases
Date   : 2010-09-13