Ubuntu – how to install java 8 in ubuntu 16.04?

16.04javajdk

How to install java-JDK 8 & maven in Ubuntu 16.04 without adding any PPA?

Best Answer

Open a terminal (ctrl+alt+t):

sudo apt-get install openjdk-8*

This will install the folowing packages:

openjdk-8-jre-dcevm - Alternative VM for OpenJDK 8 with enhanced class redefinition
openjdk-8-jre-zero - Alternative JVM for OpenJDK, using Zero/Shark
openjdk-8-dbg - Java runtime based on OpenJDK (debugging symbols)
openjdk-8-demo - Java runtime based on OpenJDK (demos and examples)
openjdk-8-doc - OpenJDK Development Kit (JDK) documentation
openjdk-8-jdk - OpenJDK Development Kit (JDK)
openjdk-8-jdk-headless - OpenJDK Development Kit (JDK) (headless)
openjdk-8-jre - OpenJDK Java runtime, using Hotspot JIT
openjdk-8-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless)
openjdk-8-jre-jamvm - Alternative JVM for OpenJDK, using JamVM
openjdk-8-source - OpenJDK Development Kit (JDK) source files

Now to maven:

sudo apt-get install maven maven*

This will install the folowing packages:

maven - Java software project management and comprehension tool
maven-ant-helper - helper scripts for building Maven components with ant
maven-debian-helper - Helper tools for building Debian packages with Maven
maven-repo-helper - Helper tools for including Maven metadata in Debian packages

Related Solutions

Ubuntu – Where is the Oracle java jdk keystore located

The keystore is : jre/lib/security/cacerts . You can list its contents by:

keytool -list -keystore java.home/jre/lib/security/cacerts -v

To find JAVA_HOME, issue this command:

sudo apt-get install galternatives

And then run that program.

But, it sound to me like you dont need to alter the keystore. What you need to do is edit the .policy file. It's easy to find at:

java.home/jre/lib/security/java.policy

Of course, if you still cant find it then it is easy to derive with this command:

sudo find / -name "java"

Ubuntu – Installing Java 8 and Setting environment variables

Actually all these PPAs are from third parties. Oracle does not provide any PPA, and the manual way of installing Oracle JDK 8 is explained in step by step manner in this article : Install Latest Oracle JDK in Ubuntu

Step 1: Download the latest JDK(jdk-Xuxx-linux-xXX.tar.gz) from this official link.

Step 2: Open the terminal (Ctrl + Alt + T) and enter the following command.

sudo mkdir /usr/lib/jvm

Step 3: Enter the following command to change the directory.

cd /usr/lib/jvm

Step 4: Extract the jdk-Xuxx-linux-xXX.tar.gz file in that directory using this command.

sudo tar -xvzf ~/Downloads/jdk-8u45-linux-x64.tar.gz

Step 5: Enter the following command to open the environment variables file.

sudo -H gedit /etc/environment

Step 6: In the opened file, add the following bin folders to the existing PATH variable.

/usr/lib/jvm/jdk1.8.0_45/bin
/usr/lib/jvm/jdk1.8.0_45/db/bin
/usr/lib/jvm/jdk1.8.0_45/jre/bin

The PATH variables have to be separated by colon. Notice that the installed JDK version is 1.8 update 45. Depending on your JDK version, the paths can be different. Add the following environment variables at the end of the file.

J2SDKDIR="/usr/lib/jvm/jdk1.8.0_45"
J2REDIR="/usr/lib/jvm/jdk1.8.0_45/jre"
JAVA_HOME="/usr/lib/jvm/jdk1.8.0_45"
DERBY_HOME="/usr/lib/jvm/jdk1.8.0_45/db"

The environment file before the modification:

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"

The environment file after the modification:

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/jvm/jdk1.8.0_45/bin:/usr/lib/jvm/jdk1.8.0_45/db/bin:/usr/lib/jvm/jdk1.8.0_45/jre/bin"
J2SDKDIR="/usr/lib/jvm/jdk1.8.0_45"
J2REDIR="/usr/lib/jvm/jdk1.8.0_45/jre"
JAVA_HOME="/usr/lib/jvm/jdk1.8.0_45"
DERBY_HOME="/usr/lib/jvm/jdk1.8.0_45/db"

Best Answer

Related Solutions

Ubuntu – Where is the Oracle java jdk keystore located

Ubuntu – Installing Java 8 and Setting environment variables

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