I'm using linux OS with Debian 11 distribution. I'm using this this documentation.
The output of javac -version is javac 1.8.0_371 indicating that I have Java 8 JDK installed.
I downloaded the specific version of BlueJ mentioned in the documentation. Then I ran sudo dpkg -i BlueJ-linux-411-duke.deb and it outputs this error messages:
Selecting previously unselected package bluej.
(Reading database ... 205849 files and directories currently installed.)
Preparing to unpack BlueJ-linux-411-duke.deb ...
Unpacking bluej (4.1.1-duke) ...
dpkg: dependency problems prevent configuration of bluej:
bluej depends on openjdk-8-jdk | oracle-java8-jdk | oracle-java8-installer; however:
Package openjdk-8-jdk is not installed.
Package oracle-java8-jdk is not installed.
Package oracle-java8-installer is not installed.
bluej depends on libopenjfx-java | oracle-java8-jdk | oracle-java8-installer; however:
Package libopenjfx-java is not installed.
Package oracle-java8-jdk is not installed.
Package oracle-java8-installer is not installed.
dpkg: error processing package bluej (--install):
dependency problems - leaving unconfigured
Processing triggers for gnome-menus (3.36.0-1) ...
Processing triggers for desktop-file-utils (0.26-1) ...
Processing triggers for mailcap (3.69) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Errors were encountered while processing:
bluej
It's saying things like Package oracle-java8-jdk is not installed. even though it is certainly installed.
I'm completely new to Java. Any feedback, help, and answers would be much appreciated.
I've now solved this problem by running
sudo nano /etc/apt/sources.list
Then in the sources.list file I added this:
deb https://debian.opennms.org/ stable main
Then I run this commands in order:
wget -O - http://debian.opennms.org/OPENNMS-GPG-KEY | sudo apt-key add -
sudo apt-get update
sudo apt-get install oracle-java8-installer
sudo dpkg -i BlueJ-linux-411-duke.deb
I now have BlueJ installed and can run it.