Ubuntu – Installing JDK.rpm file using alien

javajdknetbeansoraclesoftware installation

I'm trying to install JDK on my Ubuntu virtual machine to use it for Netbeans but for some reason it won't work. I downloaded JDK from oracle's site, the .rpm file. I read online that I should use

sudo alien -g packagename.rpm

to change the file from .rpm to .deb but it just like extracted my archive and nothing else. There's no .deb file anywhere, no executable either. I'm completely lost. Now if I do sudo aline -g package.rpm again, it says that there's already a folder with the name created but I'm stuck. What else should I do to install the JDK?

Best Answer

First read the whole answer. The first part shows you your errors and the second part shows you that alien is not necessary.

First Part

Use -d to create a DEB file

alien -d packagename.rpm

alien packagename.rpm

from man alien

-d, --to-deb
    Make debian packages. This is the default.

-g, --generate
    Generate a temporary directory suitable for building a package from,
    but do not actually create the package. This is useful if you want to
    move files around in the package before building it. The package can be
    built from this temporary directory by running "debian/rules binary",
    if you were creating a Debian package, or by running "rpmbuild -bb
    <packagename>.spec" if you were creating a Red Hat package.

Second Part

To install Oracle Java you don't need alien and a RPM file. Simply use the following commands.

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer

Related Solutions

Ubuntu – Replacing the OpenJDK with the Oracle JDK

Follow these instructions to add the source to your repositories.

In a terminal run:

sudo apt-get update
sudo apt-get install update-sun-jre
sudo update-alternatives --config firefox-javaplugin.so and select the one that's in /opt (This enables Sun Java in Firefox)

With this package you don't have to worry about constantly checking for updates. The maintainer takes good care to keep it current for you. It also adds all the update-alternatives links for you, so it's a lot less work than the above comment on your question.

java – JavaFX Missing in Ubuntu 18.04

In the Ubuntu 16.04 and later default repositories JavaFX is packaged as a separate package named openjfx. To install it in Ubuntu 18.04, open the terminal and type:

sudo apt install openjdk-8-jdk openjfx

Check that JDK 8 is selected as the default Java version in Netbeans -> Tools -> Options -> Java -> Nashorn tab -> click the Manage Platforms button -> click the Add Platform button -> click the radio button marked Java Standard Edition -> click the Next button -> browse to /usr/lib/jvm/java-8-openjdk-amd64 and select it as the default Java version.

Optionally you can install openjdk-11-jdk instead of or alongside openjdk-8-jdk. openjfx works with both openjdk-8-jdk and openjdk-11-jdk in Netbeans in Ubuntu 18.04. I am using Netbeans ~~8.2~~ 10.0 in Ubuntu 18.04.