Translation(s): English~ español-

If you've questions about packaging Java Software for Debian, have a look at Java/Packaging and the JavaPackagingFAQ.

How get going with running and compiling Java programs in Debian real quick

In order to run java software you proboably need a jre package such as openjdk-6-jre. In order to compile java you need a jdk package such as openjdk-6-jdk. If you don't care which version of java is used, then default-jre and default-jdk are packages which exist on all platforms and give you something sensible.

sudo apt-get install openjdk-6-jdk

You reach java as /usr/bin/java . This file is really a link to /etc/alternatives/java , which in turn is a link to your java installation folder that's located in /usr/lib/jvm . For instance, java may link via /etc/alternatives/java to /usr/lib/jvm/java-6-openjdk/jre/bin/java .

If you have more detailed questions, you may be interested in seeing

One particular reason that may lead your interest to read the tips above, is in case ant terminates for you with the error:


(path)/build.xml:49: Unable to find a javac compiler; is not on the classpath.

Perhaps JAVA_HOME does not point to the JDK

About pbuilder and Sun's Java SDK


I am build-depending on sun-javaX-jdk. However, I can't get an automatic build in a clean environment working, because sun-javaX-jdk does not install in a non-interactive environment, because it asks for license confirmation:

 Unpacking sun-java6-jdk (from .../sun-java6-jdk_6-06-1_amd64.deb) ...
 sun-dlj-v1-1 license could not be presented
 try 'dpkg-reconfigure debconf' to select a frontend other than noninteractive


There are two possible answers:

Patch one and for all your pbuilder environment

 $ sudo pbuilder login --save-after-login
 # echo "sun-java5-jdk shared/accepted-sun-dlj-v1-1 boolean true" | debconf-set-selections
 # echo "sun-java6-jdk shared/accepted-sun-dlj-v1-1 boolean true" | debconf-set-selections
 # exit

Add a hook to patch it on the fly

In Manuel Prinz says:

  • I use a way to do that "on the fly" because I think it's easier to manage if you have several debconf settings to manage. Just add to your .pbuilderrc:
    The create a file called i.e. "D50sun-java-licenses" in $HOOKDIR with the following content (it basically has to start with "D" and a two digit number for ordering):
     debconf-set-selections <<EOF
     sun-java5-jdk shared/accepted-sun-dlj-v1-1 boolean true
     sun-java6-jdk shared/accepted-sun-dlj-v1-1 boolean true
    This accepts the licenses before packages are installed. I prefer this because I can deactivate certain settings easily (by commenting out sections or renaming hook files) and do not have to keep a full chroot for every possible debconf setting. Also, I tend to forget which exactly setting I did in which chroot.

As mentioned in man pbuilder, you need to make the hook script (D50sun-java-licenses) executable before pbuilder will load it.