Install Java on BBB - another issue

GoogleGroups
1

Hello,

According to the book Exploring BeagleBone (Derek Molloy), the instructions to install java on BBB are as follows:

debian@beaglebone:~$ sudo update-alternatives --install /usr/bin/java java /opt/java-jdk/jdk1.8.0_261/bin/java 1
debian@beaglebone:~$ sudo update-alternatives --install /usr/bin/javac javac /opt/java-jdk/jdk1.8.0_261/bin/javac 1

Unless there was a typo, these commands don’t work: java has not been installed.

Thanks.

P.S. downloaded archive is unarchived in /opt/java-jdk

2

Hello,

According to the book Exploring BeagleBone (Derek Molloy), the instructions to install java on BBB are as follows:

Revision 1 or Revision 2 of the book?

debian@beaglebone:~$ sudo update-alternatives --install /usr/bin/java java /opt/java-jdk/jdk1.8.0_261/bin/java 1
debian@beaglebone:~$ sudo update-alternatives --install /usr/bin/javac javac /opt/java-jdk/jdk1.8.0_261/bin/javac 1

Unless there was a typo, these commands don't work: java has not been installed.

Thanks.

P.S. downloaded archive is unarchived in /opt/java-jdk

sudo apt install java-common ?

Ignoring "java 8", as that pre-dates Oracle merging their arm-32
branch directly into open-jdk.. So after java-8, openjdk is Oracle's
java..

So unless you absolutely need Java 8, just look at openjdk..

Regards,

3

Revision 1 or Revision 2 of the book?

2nd

sudo apt install java-common
Works ! Thanks.
BTW it installs “openjdk” ?

4

Revision 1 or Revision 2 of the book?
2nd

and as i asked that, i remembered, that book is sitting at work an hour away..

sudo apt install java-common
Works ! Thanks.
BTW it installs "openjdk" ?

OpenJDK (Open Java Development Kit)

Oracle submitted their Java 9 port for arm to OpenJDK:

https://openjdk.java.net/jeps/297

Regards,

5

OpenJDK (Open Java Development Kit)
With java-common I can run java files, so probably I’ll not need OpenJDK

… that book is sitting at work an hour away…

Sorry, here I didn’t understand what you mean.

6

OpenJDK provides /usr/bin/java

Regards,

7

Well … after executing instructions from “Exploring BeagleBone” and then installing java-common, java seems well installed:
debian@beaglebone:~$ ls /usr/bin/java* -l
lrwxrwxrwx 1 root root 22 Sep 4 12:46 /usr/bin/java → /etc/alternatives/java
lrwxrwxrwx 1 root root 23 Sep 4 12:48 /usr/bin/javac → /etc/alternatives/javac
debian@beaglebone:~$ java -version
java version “1.8.0_261”
Java™ SE Runtime Environment (build 1.8.0_261-b13)
Java HotSpot™ Client VM (build 25.261-b13, mixed mode)
debian@beaglebone:~$

8

I "think" update-alternatives just needs /usr/bin/java to exist, which
was solved by java-common..

Then it just updated the symlink when you ran it..

Regards,

9

Probably.
Thanks.