I earlier had Oracle Java 7 installed on my Linux box. I upgraded to Oracle Java 8 as follows (below commands to be typed in a terminal window):
$ sudo apt-get purge oracle-java7-installer <enter>
$ sudo apt-get install oracle-java8-installer <enter>
However, when Oracle Java 8 was downloaded and installed, I saw a message like this:
update-binfmts: warning: current package is oracle-java8, but binary format already installed by openjdk-7
Appears there is some issue in the update-binfmts and it could be listed using:
$ update-binfmts --display <enter>
You will see that the entry shows openjdk-7. To change it and overcome the error message, do the following:
$ sudo update-binfmts --package openjdk-7 --remove jar /usr/bin/jexec <enter>
$ sudo update-binfmts --package oracle-java8 --install jar /usr/bin/jexec --magic PKx03x04 <enter>
That’s all and it should now be okay.
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