Category Archives: DrJava

My work on DrJava, the Java IDE developed at Rice.

New DrJava stable version: drjava-stable-20130901-r5756

Corky Cartwright, my PhD advisor, released a new version of DrJava today. He writes: 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 … Continue reading

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Input/Output Redirection in DrJava?

On the AP Computer Science mailing list, there was a teacher who wanted to do input/output redirection and who asked why the following didn’t work: java LetterCounter < input.txt The Interactions Pane in DrJava is not a DOS command line … Continue reading

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DrJava DefinitionsPaneMemoryLeakTest fails on Mac

I submitted a bugfix for a problem with the debug panel when no debugger is available. I noticed that on the Mac, the DefinitionsPaneMemoryLeakTest now fails: 1234567891011121314151617181920212223242526   [junit] DefinitionsPaneMemoryLeakTest                26.92 sec    [junit] … Continue reading

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Better Number Highlighting in DrJava More Difficult

Getting the lexing right for the syntax highlighting will be a little bit more work than I thought. Right now, DrJava tokenizes numbers like 3.14 separately as “3” “.” “14”, and then it highlights “3” and “14” as numbers. That … Continue reading

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Additional Java 5 Syntax Highlighting Errors in DrJava

While adding syntax highlighting for underscores and binary literals introduced in Java 7 to DrJava, I discovered that a few other numbers aren’t syntax-highlighted correctly. Some of these problems go back to the beginning of Java, others go back to … Continue reading

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Suggestions for Better Java 7 Support in DrJava

I just looked through the new language features in Java 7, and experimented with them in DrJava. None of the changes are supported in the Interactions Pane, and there will be a lot of required work to make these things … Continue reading

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New DrJava Beta Release: drjava-beta-20110822-r5448

We have made a new development release available: drjava-beta-20110822-r5448. You can download it from the DrJava website or from SourceForge. Available for download at http://drjava.org. DrJava is a lightweight programming environment for Java designed to foster test-driven software development. It … Continue reading

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DrJava Now Works Even When Launched with the Java 7 JRE

I think I’ve got DrJava working with the Java 7 compiler the way it should, even when started with the JRE (as long as the JDK is installed as well). That was the situation that both Corky and I got … Continue reading

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Java 7 for DrJava and Concutest

I worked on Java 7 support this weekend, and I’m almost done. I just discovered that Concutest is currently incompatible with Java 7, though, so I will need to disable the ConcJUnit option in DrJava when using Java 7. I … Continue reading

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Yes, DrJava Works under Mac OS X 10.7 Lion

I just upgraded to Mac OS X 10.7, and DrJava works flawlessly. The one vague report that someone had filed therefore proved to be wrong. When I started DrJava the first time, Mac OS X asked me if I wanted … Continue reading

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Does DrJava Work on Mac OS X Lion?

We were just informed of an entry on RoaringApps indicating that DrJava does not work on Mac OS X Lion. Is that the case? We don’t know at this time. DrJava has always worked on previous versions of Mac OS … Continue reading

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Two DrJava Tutorials on YouTube

On YouTube, I found two tutorial series that describe DrJava: DrJava – Easy to use java editor (We will use this in our Java Tutorial) DrJava – The “Interaction Pane” Overview and Introductory tour of DrJava 2nd DrJava Tutorial – … Continue reading

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PPPJ 2011 Tool Paper Accepted

A while ago I worked on a paper together with Vivek, Corky, Vincent, Jared and Raghavan at Rice. We still have to make some final revisions, but I’m happy to report that our tool paper “DrHJ — a lightweight pedagogic … Continue reading

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Eclipse Has Messed with My Shortcut-fu for DrJava

Working with Eclipse for nearly half a year has definitely messed with my shortcut-fu for DrJava. I keep pressing the wrong buttons now: Very confusing indeed. I decided to pick up working on this file I/O bug in DrJava again, … Continue reading

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DrJava Is Virus-Free

Today, Ian Barland informed me that someone on the AP-CS mailing list believed he found a virus in DrJava. Let me reassure you, if you download from drjava.org or SourceForge, our software is virus-free. We build on Linux or Mac … Continue reading

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DrJava Build and Release Instructions

As part of our knowledge (back) transfer, I wrote up these instructions for creating a fresh build of all parts of DrJava and then making a new release on SourceForge. Note: Our build process is currently broken for Windows machines … Continue reading

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New DrJava Development Release: drjava-20110205-r5425

We have made a new development release available: drjava-20110205-r5425. You can download it from the DrJava website or from SourceForge. Available for download at http://drjava.org . DrJava is a lightweight programming environment for Java designed to foster test-driven software development. … Continue reading

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Integrating the Habanero Java Race Detector into DrJava

Jarred, Vincent and the guys of the Habanero Java group are planning to add a race detector to the Habanero Java compiler adapter in DrJava. I won’t have much time to help them with this, but I gave them some … Continue reading

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DrJava Listed in Overview of Java IDEs

DrJava was included in this overview of Java IDEs: Dr. Java- This is a lightweight IDE geared towards students in introductory level classes, including the Advanced Placement Computer Science course. Dr. Java has support for evaluating snippets of code without … Continue reading

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DrJava Preferences Stored in Project Files

I told myself I wouldn’t work on DrJava anymore, but here I go again. I Implemented feature request 3081586, Store Preferences within Projects, mainly because this was something I had wanted for a long time (I kept going back and … Continue reading

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