How to install java 8 JRE & JDK?

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1

Hi guys. I cant seem to find a guide to install both Java 8 JRE & JDK in OpenSuse 42.1.

Please advise me and point me to one.

Thanks,

2

you cn install openjdk 1.8 (or 8.0) from the standard oss repo’s (it should already be installed) by executing

zypper in java-1_8_0-openjdk

to get oracle’s jave go to
https://www.java.com/en/download/linux_manual.jsp
and select the 64bit rpm or click this
http://javadl.sun.com/webapps/download/AutoDL?BundleId=111740
then open a terminal in the download folder install that rpm with zypper

zypper in jre-8u66-linux-x64.rpm
3

Is installing enough? I used to be configure it after install when I was in Fedora 23. And what about JDK?

4

you need to use update-alternatives in order to select/set the default java run-time, even tho it’s called openjdk it’s not a development toolkit it’s a run-time, I do believe there is gui in kde’s config center just not sure if it was kde4’s or plasma 5’s as I don’t really use java I only keep the one that came with the OS.

edit
just remembered the KDE GUI was an extra package I played around with a few months ago it’s for KDE4
https://software.opensuse.org/package/kalternatives

5

sorry didn’t see your jdk question
well for installing the jdk is more or less the same
install the java-1_8_0-openjdk-devel packages which carry the compiler and libraries

zypper in java-1_8_0-openjdk-devel

for Oracle’s version go here and download the 64bit rpm
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
or click this
http://download.oracle.com/otn-pub/java/jdk/8u66-b17/jdk-8u66-linux-x64.rpm
then install it with zypper

zypper in jdk-8u66-linux-x64.rpm

again use update-alternatives to set the preferred java compiler

6

I installed JRE and JDK. I also installed kalternative but I dont know how to run it?

I tried update-alternatives but it seems that it cant see the Java 8 new install.

arkan:/home/ahmed # update-alternatives --all
There is only one alternative in link group alternate-install-present (providing /usr/lib/nvidia/alternate-install-present): /usr/lib/nvidia/alternate-install-present-default
Nothing to configure.

There is only one alternative in link group awk (providing /bin/awk): /usr/bin/gawk
Nothing to configure.

There is only one alternative in link group coverage (providing /usr/bin/coverage): /usr/bin/coverage-3.4
Nothing to configure.

There is only one alternative in link group db_archive (providing /usr/bin/db_archive): /usr/bin/db48_archive
Nothing to configure.

There is only one alternative in link group db_checkpoint (providing /usr/bin/db_checkpoint): /usr/bin/db48_checkpoint
Nothing to configure.

There is only one alternative in link group db_deadlock (providing /usr/bin/db_deadlock): /usr/bin/db48_deadlock
Nothing to configure.

There is only one alternative in link group db_dump (providing /usr/bin/db_dump): /usr/bin/db48_dump
Nothing to configure.

There is only one alternative in link group db_hotbackup (providing /usr/bin/db_hotbackup): /usr/bin/db48_hotbackup
Nothing to configure.

There is only one alternative in link group db_load (providing /usr/bin/db_load): /usr/bin/db48_load
Nothing to configure.

There is only one alternative in link group db_printlog (providing /usr/bin/db_printlog): /usr/bin/db48_printlog
Nothing to configure.

There is only one alternative in link group db_recover (providing /usr/bin/db_recover): /usr/bin/db48_recover
Nothing to configure.

There is only one alternative in link group db_sql (providing /usr/bin/db_sql): /usr/bin/db48_sql
Nothing to configure.

There is only one alternative in link group db_stat (providing /usr/bin/db_stat): /usr/bin/db48_stat
Nothing to configure.

There is only one alternative in link group db_upgrade (providing /usr/bin/db_upgrade): /usr/bin/db48_upgrade
Nothing to configure.

There is only one alternative in link group db_verify (providing /usr/bin/db_verify): /usr/bin/db48_verify
Nothing to configure.

There is only one alternative in link group easy_install (providing /usr/bin/easy_install): /usr/bin/easy_install-3.4
Nothing to configure.

There is only one alternative in link group ftp (providing /usr/bin/ftp): /usr/bin/tnftp
Nothing to configure.

There is only one alternative in link group funzip (providing /usr/bin/funzip): /usr/bin/funzip-plain
Nothing to configure.

There is only one alternative in link group gem2rpm (providing /usr/bin/gem2rpm): /usr/bin/gem2rpm.ruby2.1-0.10.1
Nothing to configure.

There is only one alternative in link group gem2rpm-0.10.1 (providing /usr/bin/gem2rpm-0.10.1): /usr/bin/gem2rpm.ruby2.1-0.10.1
Nothing to configure.

There is only one alternative in link group gem2rpm.ruby2.1 (providing /usr/bin/gem2rpm.ruby2.1): /usr/bin/gem2rpm.ruby2.1-0.10.1
Nothing to configure.

There is only one alternative in link group gst-install-plugins-helper (providing /usr/lib/gst-install-plugins-helper): /usr/lib/pk-gstreamer-install
Nothing to configure.

There are 2 choices for the alternative gtk-update-icon-cache (providing /usr/bin/gtk-update-icon-cache).

Selection Path Priority Status

  • 0 /usr/bin/gtk-update-icon-cache-3.0 3 auto mode
    1 /usr/bin/gtk-update-icon-cache-2.0 2 manual mode
    2 /usr/bin/gtk-update-icon-cache-3.0 3 manual mode

Press enter to keep the current choice
[li], or type selection number: 3[/li]There are 2 choices for the alternative gtk-update-icon-cache (providing /usr/bin/gtk-update-icon-cache).

Selection Path Priority Status

  • 0 /usr/bin/gtk-update-icon-cache-3.0 3 auto mode
    1 /usr/bin/gtk-update-icon-cache-2.0 2 manual mode
    2 /usr/bin/gtk-update-icon-cache-3.0 3 manual mode

Press enter to keep the current choice
[li], or type selection number: 0[/li]
There are 2 choices for the alternative icewm (providing /usr/bin/icewm).

Selection Path Priority Status

  • 0 /usr/bin/icewm-default 100 auto mode
    1 /usr/bin/icewm-default 100 manual mode
    2 /usr/bin/icewm-lite 0 manual mode

Press enter to keep the current choice
[li], or type selection number: 0[/li]
There is only one alternative in link group input.svgz (providing /usr/share/plasma/desktoptheme/default/icons/input.svgz): /usr/share/plasma/desktoptheme/default/icons/input.svgz-kdeorg
Nothing to configure.

There are 2 choices for the alternative java (providing /usr/bin/java).

Selection Path Priority Status

  • 0 /usr/lib64/jvm/jre-1.8.0-openjdk/bin/java 1805 auto mode
    1 /usr/lib64/jvm/jre-1.7.0-openjdk/bin/java 1705 manual mode
    2 /usr/lib64/jvm/jre-1.8.0-openjdk/bin/java 1805 manual mode

Press enter to keep the current choice
[li], or type selection number: 0[/li]
There are 2 choices for the alternative javaplugin (providing /usr/lib64/browser-plugins/javaplugin.so).

Selection Path Priority Status

  • 0 /usr/lib64/java-1_8_0-openjdk-plugin/lib/IcedTeaPlugin.so 18020 auto mode
    1 /usr/lib64/java-1_7_0-openjdk-plugin/lib/IcedTeaPlugin.so 17147 manual mode
    2 /usr/lib64/java-1_8_0-openjdk-plugin/lib/IcedTeaPlugin.so 18020 manual mode

Press enter to keep the current choice
[li], or type selection number: 0[/li]
There is only one alternative in link group jre_1.7.0 (providing /usr/lib64/jvm/jre-1.7.0): /usr/lib64/jvm/jre-1.7.0-openjdk
Nothing to configure.

There is only one alternative in link group jre_1.8.0 (providing /usr/lib64/jvm/jre-1.8.0): /usr/lib64/jvm/jre-1.8.0-openjdk
Nothing to configure.

There are 2 choices for the alternative jre_openjdk (providing /usr/lib64/jvm/jre-openjdk).

Selection Path Priority Status

  • 0 /usr/lib64/jvm/jre-1.8.0-openjdk 1805 auto mode
    1 /usr/lib64/jvm/jre-1.7.0-openjdk 1705 manual mode
    2 /usr/lib64/jvm/jre-1.8.0-openjdk 1805 manual mode

Press enter to keep the current choice
[li], or type selection number: 0[/li]
There are 2 choices for the alternative kdesu (providing /usr/bin/kdesu).

Selection Path Priority Status

  • 0 /usr/lib64/libexec/kf5/kdesu 25 auto mode
    1 /usr/lib64/kde4/libexec/kdesu 20 manual mode
    2 /usr/lib64/libexec/kf5/kdesu 25 manual mode

Press enter to keep the current choice
[li], or type selection number: 0[/li]
There is only one alternative in link group keyring (providing /usr/bin/keyring): /usr/bin/keyring-2.7
Nothing to configure.

There is only one alternative in link group ksh (providing /bin/ksh): /bin/ksh93
Nothing to configure.

There is only one alternative in link group ld (providing /usr/bin/ld): /usr/bin/ld.bfd
Nothing to configure.

There is only one alternative in link group libblas.so.3 (providing /usr/lib64/libblas.so.3): /usr/lib64/blas/libblas.so.3
Nothing to configure.

There are 2 choices for the alternative libglx.so (providing /usr/lib64/xorg/modules/extensions/libglx.so).

Selection Path Priority Status

  • 0 /usr/lib64/xorg/modules/extensions/nvidia/nvidia-libglx.so 100 auto mode
    1 /usr/lib64/xorg/modules/extensions/nvidia/nvidia-libglx.so 100 manual mode
    2 /usr/lib64/xorg/modules/extensions/xorg/xorg-libglx.so 50 manual mode

Press enter to keep the current choice
[li], or type selection number: 0[/li]
There is only one alternative in link group liblapack.so.3 (providing /usr/lib64/liblapack.so.3): /usr/lib64/lapack/liblapack.so.3
Nothing to configure.

There is only one alternative in link group lua (providing /usr/bin/lua): /usr/bin/lua5.2
Nothing to configure.

There is only one alternative in link group mount.ntfs (providing /sbin/mount.ntfs): /sbin/mount.ntfs-3g
Nothing to configure.

There is only one alternative in link group netcat (providing /usr/bin/netcat): /usr/bin/nc
Nothing to configure.

There is only one alternative in link group nosetests (providing /usr/bin/nosetests): /usr/bin/nosetests-3.4
Nothing to configure.

There is only one alternative in link group openSUSE-default.xml (providing /usr/share/wallpapers/openSUSE-default.xml): /usr/share/wallpapers/openSUSE-default-static.xml
Nothing to configure.

There is only one alternative in link group pip (providing /usr/bin/pip): /usr/bin/pip3.4
Nothing to configure.

There is only one alternative in link group rake (providing /usr/bin/rake): /usr/bin/rake.ruby.ruby2.1
Nothing to configure.

There is only one alternative in link group rake.ruby2.1 (providing /usr/bin/rake.ruby2.1): /usr/bin/rake.ruby.ruby2.1
Nothing to configure.

There is only one alternative in link group rdoc (providing /usr/bin/rdoc): /usr/bin/rdoc.ruby.ruby2.1
Nothing to configure.

There is only one alternative in link group rdoc.ruby2.1 (providing /usr/bin/rdoc.ruby2.1): /usr/bin/rdoc.ruby.ruby2.1
Nothing to configure.

There is only one alternative in link group ri (providing /usr/bin/ri): /usr/bin/ri.ruby.ruby2.1
Nothing to configure.

There is only one alternative in link group ri.ruby2.1 (providing /usr/bin/ri.ruby2.1): /usr/bin/ri.ruby.ruby2.1
Nothing to configure.

There is only one alternative in link group unzip (providing /usr/bin/unzip): /usr/bin/unzip-plain
Nothing to configure.

There is only one alternative in link group unzipsfx (providing /usr/bin/unzipsfx): /usr/bin/unzipsfx-plain
Nothing to configure.

There is only one alternative in link group vncviewer (providing /usr/bin/vncviewer): /usr/bin/vncviewer-tigervnc
Nothing to configure.

There is only one alternative in link group xml-commons-apis (providing /usr/share/java/xml-commons-apis.jar): /usr/share/java/xerces-j2-xml-apis.jar
Nothing to configure.

There is only one alternative in link group zipgrep (providing /usr/bin/zipgrep): /usr/bin/zipgrep-plain
Nothing to configure.

Please advise me. Thanks,

7

to use kalternatives you need to use kde4’s settings center for that you need to install kdebase4-workspace-addons

zypper in kdebase4-workspace-addons

then you need to run systemsettings

systemsettings

there should be a menu item called KDE System Settings but plasma5 also has that menu item for running plasma 5 system settings.

the rest of your post is informative, update-alternatives is not used for java only it’s used for a lot of other applications and for most you don’t have an alternative.
I’d say you need to run
for jre

update-alternatives --config java

for jdk

update-alternatives --config javac
8

The java 8 is not showing in the alternatives list. I need it to be added to show.

arkan:/home/ahmed # update-alternatives --config java
There are 2 choices for the alternative java (providing /usr/bin/java).      
                                                                             
  Selection    Path                                       Priority   Status  
------------------------------------------------------------                 
* 0            /usr/lib64/jvm/jre-1.8.0-openjdk/bin/java   1805      auto mode
  1            /usr/lib64/jvm/jre-1.7.0-openjdk/bin/java   1705      manual mode
  2            /usr/lib64/jvm/jre-1.8.0-openjdk/bin/java   1805      manual mode                       

Press enter to keep the current choice
[li], or type selection number: 0[/li]arkan:/home/ahmed # update-alternatives --config javac
update-alternatives: error: no alternatives for javac
arkan:/home/ahmed #
9

It looks like your update-alternatives is currently set to Java 8 JRE using openjdk ( 1.8.x is Java 8).
javac is a package and binary, so there wouldn’t be an update-alternatives setting it (at most there might have been an update-alternatives setting for the jdk, but that doesn’t seem to be the case for openjdk’s jdk).

So,
Some things to know about the jre and jdk using openjdk…

  • By default when you install the openjdk package, it only installs the jre, you don’t install the jdk.
  • To install the openjdk jdk, you have to install the package openjdk-devel(select specific version for 7 or 8).
  • Once openjdk-devel is installed, although it’s automatically linked to the existing update-alternative options(You won’t see a new separate option), it looks like it’s set regardless of update-alternatives setting (eg if you set to Java 7 jre, you’re still using the Java 8 jdk). I don’t know if that’s an error or not.

Bottom line for your example invoking javac is that it wouldn’t be even expected to be seen in update-alternatives. If it’s installed, it’s accessible without needing any switching.
You should just be able to invoke in a console, eg

javac -help

TSU

10

The Oracle package doesn’t facilitate ease of use with update-alternatives (you have to manually intervine). You need to use (as root) update-alternatives --install blah blah blah

See man update-alternatives for details about the blah blah blah switches

11

well I haven’t done java in a long time and that was just for fun (I’m not a coder), the only issue running multiple java virtual machines and compilers are the $PATH and $CLASSPATH environment variables which uses different executeble’s and jar files for different runtimes/compilers
my recommendation is to use 2 or more bash files which will modify your path and classpath
you can try something like this:
for java and javac and cp add these two lines

[FONT=inherit][FONT=&quot]export PATH=/path/to/java/you/want/to/use/bin:$PATH
[FONT=inherit][FONT=inherit][FONT=&quot]export CLASSPATH="[FONT=inherit][FONT=inherit][FONT=&quot]/path/to/java/you/want/to/use/lib/ext[/FONT][/FONT][/FONT] [/FONT][/FONT]
[/FONT][/FONT][/FONT]

use one script to modify your path and classpath to point to openjdk_1.8 and a second to point to Oracle’s java bin folder and the classpath to oracle’s ext folder

12

A User posted his scripts to install update-alternatives for Oracle 8 JDE (I assume based on the SE RPM, since there is no mention whether he used the RPM or TAR). I have not tried his scripts or reviewed closely what is in the scripts but a superficial skim suggests the scripts might work

https://forums.opensuse.org/showthread.php/512626-Java-8-jdk-and-update-alternatives-on-Leap

If the scripts work,
I may apply the same improvements I contributed for the Oracle SE JDK 7 scripts which can be found in the comments to the SDB and on my github site. I didn’t post Oracle SE 8 JDK 8 scripts because the JDK architecture moving from 7 to 8 radically changed and requires some real work to identify all the components that need to be linked in the newer JDK.

Again… This is strictly for the Oracle 8 JDK download and <does not> apply to the openjdk JDK installed by the OP of this thread.

tSU

13

  1. Download jdk from Oracle:
    64bit Version: http://download.oracle.com/otn-pub/java/jdk/8u74-b02/jdk-8u74-linux-x64.rpm
    32bit Version:http://download.oracle.com/otn-pub/java/jdk/8u74-b02/jdk-8u74-linux-i586.rpm

  2. Install the JDK by opening a terminal,
    becoming ROOT and switching to the directory where you downloaded the RPM package.

For x64 version execute: rpm -i jdk-8u74-linux-x64.rpm

For 32-bit version execute: rpm -i jdk-8u74-linux-i586.rpm

  1. Make the OracleJDK default system JDK. While at the terminal and with root privileges execute the following sequence of commands:
    a. update-alternatives --install /usr/bin/java java /usr/java/jdk1.8.0_74/bin/java 1551

        b.        update-alternatives --install /usr/bin/javac javac /usr/java/jdk1.8.0_74/bin/javac 1551

    c. (this one is for browser plugin, optional, in openSuse we have IcedTea, as for me redundant step..)                                                                                                                                                      update-alternatives --install /usr/lib/browser-plugins/javaplugin.so javaplugin /usr/java/jdk1.8.0_74/jre/lib/amd64/libnpjp2.so" 1551

  2.     a.   update-alternatives --config java
                                                                                And choose ....           /usr/java/jdk1.8.0_74/bin/java
       
    b.   update-alternatives --config javac
                                                                               And choose ....           /usr/java/jdk1.8.0_74/bin/javac 

  c. (optional, for browser plugin, may break you dependencies, openSuse uses IcedTea by default)
                                                                                                                                                                                     update-alternatives --config javaplugin

  3. Type ‘exit‘ at the terminal. As normal user open ~/.bashrc in your favorite command line text editor and add the following lines:

export JAVA_HOME=/usr/java/jdk1.8.0_74
export PATH=$JAVA_HOME/bin:$PATH

save file and then in terminal modify/add :
source ~/.bash_profile