BlueJ is a development environment that allows you to develop Java programs quickly and easily.
A note about the future of ecsoft2.org
ecsoft2.org runs on software (Drupal 7 and PHP 7.4) that reached its end of life years ago and no longer receives security updates. Keeping the site online safely is getting harder.
Giving it a future means migrating it to a current platform — and that is only worth doing if people still use it and want to help keep it alive.
If you care about ecsoft2.org, as a user, a contributor, or someone willing to lend a hand, please ggamba
tiscali [dot] it (get in touch) by January 31, 2027.
If no one comes forward by then, the site will be turned into a read-only archive, so that its content stays available.
Program is distributed as JAR package: download to destination folder, create a java.exe program object using "-jar bluej-xxx.jar" for parameter. See below for download link(s).
Following ones are the download links for manual installation:
| BlueJ v. 3.1.7 (24/5/2020, Michael Kölling, Ian Utting, Davin McCall, Neil Brown, Amjad Altadmri, Fabio Hedayioglu) | ||
hobbes.nmsu.edu/download/pub/java/dev/BlueJ_GreenFoot.zip |
local copy
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| BlueJ v. 3.1.7 (23/2/2016, Michael Kölling, Ian Utting, Davin McCall, Neil Brown, Amjad Altadmri, Fabio Hedayioglu) | Readme/What's new |
This is a bug-fix release for users who still need to use Java 6. In the absence of any major issues, it will be the last version of BlueJ which will work with Java 6.
List of fixes and improvements:
Fixed problems in handling SVN projects.
Fixed minor issues with the debugger.
Note that from this version, to work around bugs in the SVNKit library that BlueJ uses for Subversion support, BlueJ projects which are shared to or checked out from a repository will use the (old) version 1.6 working copy format. This may mean that some external tools (including recent versions of the subversion command line client) may not be able usable with BlueJ projects. Projects checked out or shared using BlueJ version 3.1.6 used the version 1.7 working copy format and will not work properly (in any version of BlueJ) due to SVNKit bugs; BlueJ version 3.1.7 will issue a warning when opening such a project. |
www.bluej.org/download/files/bluej-317.jar |
local copy
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| BlueJ v. 3.1.7 (Source code, , Michael Kölling, Ian Utting, Davin McCall, Neil Brown, Amjad Altadmri, Fabio Hedayioglu) | Readme/What's new |
This is a bug-fix release for users who still need to use Java 6. In the absence of any major issues, it will be the last version of BlueJ which will work with Java 6.
List of fixes and improvements:
Fixed problems in handling SVN projects.
Fixed minor issues with the debugger.
Note that from this version, to work around bugs in the SVNKit library that BlueJ uses for Subversion support, BlueJ projects which are shared to or checked out from a repository will use the (old) version 1.6 working copy format. This may mean that some external tools (including recent versions of the subversion command line client) may not be able usable with BlueJ projects. Projects checked out or shared using BlueJ version 3.1.6 used the version 1.7 working copy format and will not work properly (in any version of BlueJ) due to SVNKit bugs; BlueJ version 3.1.7 will issue a warning when opening such a project. |
www.bluej.org/download/files/source/BlueJ-source-317.zip |

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