"install-java.sh" is an installation script for setting up Java Development Kit (JDK) on Debian based Linux Operating Systems.

Currently, the install-java.sh script supports tar.gz distributions from Oracle, OpenJDK and AdoptOpenJDK

I'm mainly using Ubuntu and therefore this script is tested only on different versions of Ubuntu.

The script uses "unzip" command. Therefore, please make sure it is installed.

sudo apt install unzip

The "install-java.sh" script will not download the Java distribution. You must download JDK tar.gz distribution.

For Oracle JDK 7 & 8, install-java.sh supports installing demos and "Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files". This files are picked up from the same directory.

For example, if you want to install Java 7, then the following files should be downloaded and moved to a single directory.

• jdk-7u80-linux-x64.tar.gz
• jdk-7u80-linux-x64-demos.tar.gz
• UnlimitedJCEPolicyJDK7.zip

Similarly for Java 8, following are the files required

• jdk-8u212-linux-x64.tar.gz
• jdk-8u212-linux-x64-demos.tar.gz
• jce_policy-8.zip

The Java Demos and Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy files are optional. There are no demos from Java 9 upwards. Since Java 9, default JCE policy files already allow for "unlimited" cryptographic strengths.

For any other JDK, you only need to have the Java binary distribution.

The script needs to be run as root.

You need to provide the JDK distribution file (tar.gz) and the Java Installation Directory. The default value for Java installation directory is "/usr/lib/jvm"

$ sudo ./install-java.sh -h

Usage: 
install-java.sh -f <java_dist> [-p <java_dir>]

-f: The jdk tar.gz file.
-p: Java installation directory. Default: /usr/lib/jvm.
-h: Display this help and exit.

Example: Installing Oracle JDK 12

$ sudo ./install-java.sh -f ~/software/java/jdk-12.0.1_linux-x64_bin.tar.gz 
Installing: jdk-12.0.1_linux-x64_bin.tar.gz
Extracting /home/isuru/software/java/jdk-12.0.1_linux-x64_bin.tar.gz to /usr/lib/jvm
JDK is extracted to /usr/lib/jvm/jdk-12.0.1
Run update-alternatives commands? [y/N] 
Do you want to set JAVA_HOME environment variable in /home/isuru/.bashrc? [y/N]

You can automate the Java installation script by using the yes command.

Example: Installing AdoptOpenJDK 11

yes | sudo ./install-java.sh -f ~/software/java/OpenJDK11U-jdk_x64_linux_hotspot_11.0.3_7.tar.gz

The installation script will also create a shortcut for Oracle Java Mission Control (JMC).

If the "Welcome" page is blank in JMC, try installing libwebkitgtk-3.0-0 package.

sudo apt install libwebkitgtk-3.0-0

There is another script named "uninstall-java.sh" to uninstall Java.

You need to provide Java distribution directory.

$ sudo ./uninstall-java.sh -h

Usage: 
uninstall-java.sh -p <java_dist_dir>

-p: Java distribution directory.
-h: Display this help and exit.

Example: Uninstall Oracle JDK 12

sudo ./uninstall-java.sh -p /usr/lib/jvm/jdk-12.0.1/

Copyright (C) 2014 M. Isuru Tharanga Chrishantha Perera

Licensed under the Apache License, Version 2.0