Package not dependent upon non-headless JRE

[Ian Gibbs]

It is possible to install the arduino package without a suitable JRE to run it with.

11.10 64-bit. arduino-0022+dfsg-4ubuntu0.1

For whatever reason (maybe because of another program I had installed), I had default-jre-headless (and thus openjdk-6-jre-headless) installed. The computer is not headless. I did not choose to have headless JRE as I regularly use Java GUI programs.

I installed arduino from the Ubuntu Software Centre. It failed to start from the launcher. Running it from the command line gives the output:

Exception in thread "main" java.lang.ExceptionInInitializerError
    at processing.app.Base.main(Base.java:112)
Caused by: java.awt.HeadlessException
    at sun.awt.HeadlessToolkit.getMenuShortcutKeyMask(HeadlessToolkit.java:231)
    at processing.core.PApplet.<clinit>(Unknown Source)
    ... 1 more

Installing openjdk-6-jre resolves the problem by replacing the headless JRE with a full one. I don't believe I should have been able to install it without my headless JRE being upgraded to a full one.

[Ian Gibbs (flash666)]

I'm not the only one: http://askubuntu.com/questions/26474/unable-to-install-arduino

[Scott Howard (showard314)]

Thanks,
This bug has bothered me - because it does depend on openjdk-6-jre already and should already do what you are asking (but obviously is not):

From http://packages.debian.org/sid/arduino, Arduino depends on:
dep: default-jre OR java6-runtime

default-jre requires:
default-jre-headless AND openjdk-6-jre

default-jre-headless requires:
openjdk-6-jre-headless

java6-runtime is any of:
default-jre, openjdk-6-jre, openjdk-7-jre, sun-java6-jre

So expanding dependencies, arduino requires:
(openjdk-6-jre-headless AND openjdk-6-jre)
OR
([openjdk-6-jre-headless AND openjdk-6-jre] OR openjdk-6-jre OR openjdk-7-jre OR sun-java6-jre)

So your bug should be impossible, all possible scenarios are already covered - if you only hard openjdk-6-jre-headless, it should not have let you installed arduino without first installing default-jre (which would install openjdk-6-jre).

If anyone has any hints to what's going on, I'd appreciate it.
~Scott