I installed jdk-8u91-linux-x64.rpm onto my CentOS box, got no errors.
However, when I write the command it is still displaying Java 7, not the Java 8 I installed.
$ java -version
java version "1.7.0_09-icedtea" OpenJDK Runtime Environment (rhel-2.3.4.1.el6_3-x86_64) OpenJDK 64-Bit Server VM (build 23.2-b09, mixed mode)
I need to leave Java7 files, but need java to use 8.
You missing the following:
cd /opt/jdk1.8.xxx/
alternatives --install /usr/bin/java java /opt/jdk1.8.xxx/bin/java 2
alternatives --config java
alternatives --install /usr/bin/jar jar /opt/jdk1.8.xxx/bin/jar 2
alternatives --install /usr/bin/javac javac /opt/jdk1.8.xxx/bin/javac 2
alternatives --set jar /opt/jdk1.8.xxx/bin/jar
alternatives --set javac /opt/jdk1.8.xxx/bin/javac
For more information: http://tecadmin.net/install-java-8-on-centos-rhel-and-fedora/
Run this and it will find all instances of java installed:
update-alternatives --config java
Then select the version to default to.
/Thread
To see which version(s) of JDKs are installed, run the below command:
update-java-alternatives --list
Use java -version , to see which Java version you are currently using.
To use the latest OpenJDK 8, follow the following steps to install and set OpenJDK 8 the default Java version:
Enter the following command, type user password and hit Enter to continue.
sudo add-apt-repository ppa:openjdk-r/ppa
Update system package cache with the command :
sudo apt-get update
Install OpenJDK 8 by running :
sudo apt-get install openjdk-8-jdk
To make it the default version, enter :
sudo update-alternatives --config java
and select OpenJDK 8 by typing the selection number against it.
Also, set default Java Compiler by running :
sudo update-alternatives --config javac
Now run
java -version
to check if Java is updated.
Reference: http://ubuntuhandbook.org/index.php/2015/01/install-openjdk-8-ubuntu-14-04-12-04-lts/
update-java-alternatives in CentOS.
$PATHvariable. I am not sure how CentOS manages environment variables and software alternatives, but you might want to look into this topic. Maybe this helps.