How to Install Oracle Java JRE on Ubuntu Linux
This tutorial will cover the installation of 32-bit and 64-bit Oracle Java 7 (currently version number 1.8.0_5) JRE on 32-bit and 64-bit Ubuntu operating systems. These instructions will also work on Debian and Linux Mint. This article is intended for those who only want to install Oracle Java JRE on their Debian based Linux systems, such as Debian, Ubuntu and Linux Mint. Using this method you will only be able to run and execute Java programs and not be able to develop and program in Java. This article was created due to so many requests from other users who wanted to know how to only install Oracle Java JRE on their Ubuntu systems. I included a section on how to enable Oracle Java JRE in your web browsers as well using this method. These instructions will work on Debian, Ubuntu and Linux Mint.
Steps
1Check to see if your Ubuntu Linux operating system architecture is 32-bit or 64-bit, open up a terminal and run the following command below.
Ad- Type/Copy/Paste: file /sbin/init
- Note the bit version of your Ubuntu Linux operating system architecture it will display whether it is 32-bit or 64-bit.
- Type/Copy/Paste: file /sbin/init
- 2
Check if you have Java installed on your system. To do this, you will have to run the Java version command from terminal.
- Open up a terminal and enter the following command:
- Type/Copy/Paste: java -version
- If you have OpenJDK installed on your system it may look like this:
- java version “1.7.0_15”
OpenJDK Runtime Environment (IcedTea6 1.10pre) (6b15~pre1-0lucid1)
OpenJDK 64-Bit Server VM (build 19.0-b09, mixed mode)
- java version “1.7.0_15”
- If you have OpenJDK installed on your system, you have the wrong vendor version of Java installed for this exercise.
- Open up a terminal and enter the following command:
- 3
Completely remove the OpenJDK/JRE from your system and create a directory to hold your Oracle Java JRE binaries. This will prevent system conflicts and confusion between different vendor versions of Java. For example, if you have the OpenJDK/JRE installed on your system, you can remove it by typing the following at the command line:
- Type/Copy/Paste: sudo apt-get purge openjdk-*
- This command will completely remove OpenJDK/JRE from your system
- Type/Copy/Paste: sudo mkdir -p /usr/local/java
- This command will create a directory to hold your Oracle Java JDK and JRE binaries.
- Type/Copy/Paste: sudo apt-get purge openjdk-*
- 4
Download the Oracle Java JRE for Linux. Make sure you select the correct compressed binaries for your system architecture 32-bit or 64-bit (which end in tar.gz).
- For example, if you are on Ubuntu Linux 32-bit operating system download 32-bit Oracle Java binaries.
- For example, if you are on Ubuntu Linux 64-bit operating system download 64-bit Oracle Java binaries.
- Optional, Download the Oracle Java JDK/JRE Documentation
- Select jdk-7u40-apidocs.zip
- Important Information: 64-bit Oracle Java binaries do not work on 32-bit Ubuntu Linux operating systems, you will receive multiple system error messages, if you attempt to install 64-bit Oracle Java on 32-bit Ubuntu Linux.
- For example, if you are on Ubuntu Linux 32-bit operating system download 32-bit Oracle Java binaries.
5Copy the Oracle Java binaries into the /usr/local/java directory. In most cases, the Oracle Java binaries are downloaded to: /home/“your_user_name”/Downloads.
- 32-bit Oracle Java on 32-bit Ubuntu Linux installation instructions:
- Type/Copy/Paste: cd /home/“your_user_name”/Downloads
- Type/Copy/Paste: sudo cp -r jre-8u5-linux-i586.tar.gz /usr/local/java
- Type/Copy/Paste: cd /usr/local/java
- 64-bit Oracle Java on 64-bit Ubuntu Linux installation instructions:
- Type/Copy/Paste: cd /home/“your_user_name”/Downloads
- Type/Copy/Paste: sudo cp -r jre-8u5-linux-x64.tar.gz /usr/local/java
- Type/Copy/Paste: cd /usr/local/java
- 32-bit Oracle Java on 32-bit Ubuntu Linux installation instructions:
6Run the following commands on the downloaded Oracle Java tar.gz files. Make sure to do this as root in order to make them executable for all users on your system. To open a root terminal type sudo -s you will be prompted for your logon password.
- 32-bit Oracle Java on 32-bit Ubuntu Linux installation instructions:
- Type/Copy/Paste: sudo chmod a+x jre-8u5-linux-i586.tar.gz
- 64-bit Oracle Java on 64-bit Ubuntu Linux installation instructions:
- Type/Copy/Paste: sudo chmod a+x jre-8u5-linux-x64.tar.gz
- 32-bit Oracle Java on 32-bit Ubuntu Linux installation instructions:
7Unpack the compressed Java binaries, in the directory /usr/local/java
- 32-bit Oracle Java on 32-bit Ubuntu Linux installation instructions:
- Type/Copy/Paste: sudo tar xvzf jre-8u5-linux-i586.tar.gz
- 64-bit Oracle Java on 64-bit Ubuntu Linux installation instructions:
- Type/Copy/Paste: sudo tar xvzf jre-8u5-linux-x64.tar.gz
- 32-bit Oracle Java on 32-bit Ubuntu Linux installation instructions:
8Double-check your directories. At this point, you should have an uncompressed binary directory in /usr/local/java for the Java JDK/JRE listed as:
- Type/Copy/Paste: ls -a
- jre1.8.0_05
9Edit the system PATH file /etc/profile and add the following system variables to your system path. Use nano, gedit or any other text editor, as root, open up /etc/profile.
- Type/Copy/Paste: sudo gedit /etc/profile
- or
- Type/Copy/Paste: sudo nano /etc/profile
10Scroll down to the end of the file using your arrow keys and add the following lines below to the end of your /etc/profile file:
- Type/Copy/Paste:JAVA_HOME=/usr/local/java/jre1.7.0_45
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME
export PATH
- Type/Copy/Paste:JAVA_HOME=/usr/local/java/jre1.7.0_45
11Save the /etc/profile file and exit.
- 12
Inform your Ubuntu Linux system where your Oracle Java JRE is located. This will tell the system that the new Oracle Java version is available for use.
- Type/Copy/Paste: sudo update-alternatives –install “/usr/bin/java” “java” “/usr/local/java/jre1.8.0_05/bin/java” 1
- this command notifies the system that Oracle Java JRE is available for use
- Type/Copy/Paste: sudo update-alternatives –install “/usr/bin/javaws” “javaws” “/usr/local/java/jre1.8.0_05/bin/javaws” 1
- this command notifies the system that Oracle Java Web start is available for use
- Type/Copy/Paste: sudo update-alternatives –install “/usr/bin/java” “java” “/usr/local/java/jre1.8.0_05/bin/java” 1
- 13
Inform your Ubuntu Linux system that Oracle Java JRE must be the default Java.
- Type/Copy/Paste: sudo update-alternatives –set java /usr/local/java/jre1.8.0_05/bin/java
- This command will set the Java runtime environment for the system
- Type/Copy/Paste: sudo update-alternatives –set javaws /usr/local/java/jre1.8.0_05/bin/javaws
- this command will set Java Web start for the system
- Type/Copy/Paste: sudo update-alternatives –set java /usr/local/java/jre1.8.0_05/bin/java
14Reload your system wide PATH /etc/profile by typing the following command:
- Type/Copy/Paste: /etc/profile
- Note your system-wide PATH /etc/profile file will reload after reboot of your Ubuntu Linux system
15Test to see if Oracle Java was installed correctly on your system. Run the following commands and note the version of Java:
16A successful installation of 32-bit Oracle Java will display:
- Type/Copy/Paste: java -version
- This command displays the version of Java running on your system
- You should receive a message which displays:
- java version “1.8.0_05”
Java(TM) SE Runtime Environment (build 1.8.0_05-b18)
Java HotSpot(TM) Server VM (build 24.45-b08, mixed mode)
- java version “1.8.0_05”
- Type/Copy/Paste: java -version
17A successful installation of Oracle Java 64-bit will display:
- Type/Copy/Paste: java -version
- This command displays the version of Java running on your system
- You should receive a message which displays:
- java version “1.8.0_05”
Java(TM) SE Runtime Environment (build 1.8.0_05-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)
- java version “1.8.0_05”
- Type/Copy/Paste: java -version
Reference
http://www.wikihow.com/Install-Oracle-Java-JRE-on-Ubuntu-Linux