[ubuntu-za] Help with running GREENFOOT> error message - bb + cc

[Ubuntu Bear ZA]

On 28/11/2013 07:35, Wesley Werner wrote:
> Hello,
>
> Yes try running the jar file from the terminal, it will give you a
> more helpful error message if anything is amiss:
>
>      java -jar Greenfoot-generic-221.jar
>
> Or run Greenfoot from the terminal directly - try Green<tab> to auto
> complete the command. Unless the menu shortcut runs the above java
> -jar command then you won't have a dedicated executable or shell
> script.
>
hi Werner and Johan, I got this reply in terminal java -jar 
Greenfoot-generic-221.jar

""HP-635-Notebook-PC:~$ java -jar Greenfoot-generic-221.jar
Error: Unable to access jarfile Greenfoot-generic-221.jar

re the java version

java -version
""java version "1.7.0_25"
OpenJDK Runtime Environment (IcedTea 2.3.10) (7u25-2.3.10-1ubuntu0.12.04.2)
OpenJDK Client VM (build 23.7-b01, mixed mode, sharing)

re typing in GREENFOOT
""greenfoot
A suitable JDK couldn't be located. You may need to edit the
/usr/bin/greenfoot launch script.

what does this mean?

Rusty