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How to Install Oracle Java 7 update 45 on Ubuntu 12.04-64 Linux

This is a step-by-step installation instructions for Java on Ubuntu 64.

Open your console window and enter the following command:

$ java –version

If you get the following result, you already have Java 7 installed and can ignore the rest of the steps:

java -version java version "1.6.0_45"
Java(TM) SE Runtime Environment (build 1.6.0_45-b06)
Java HotSpot(TM) 64-Bit Server VM (build 20.45-b01, mixed mode)

Step 1: Create the installation folder

$ sudo mkdir -p /usr/lib/jvm

The –p option ensures that all folders in the mkdir path 1s created.

Step 2: Download Oracle Java

Download jre-7u79-linux-x64.tar.gz, jdk-7u79-linux-x64.tar.gz from:
http://www.oracle.com/technetwork/java/javase/downloads/jre7-downloads-1880261.html
http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html

Step 3: Navigate to the folder to which you downloaded the Java installation files

Typicly:

$ cd ~/Downloads

Step 4: Move the downloaded files to the installation folder

$ sudo mv jdk-6u45-linux-x64.bin  /usr/lib/jvm
$ sudo mv jre-6u45-linux-x64.bin /usr/lib/jvm

Step 5: Change to the installation folder.

$ cd /usr/lib/jvm

Step 6: Make the downloaded binaries executable.

$ sudo chmod a+x jdk-6u45-linux-x64.bin 
$ sudo chmod a+x jre-6u45-linux-x64.bin

Step 7: Extract both compressed binary files.

$ sudo ./jdk-6u45-linux-x64.bin 
$ sudo ./jre-6u45-linux-x64.bin

Step 8: Check your extracted folder names.

$ ls -l

Response: jdk1.6.0_45 jre1.6.0_45

Step 9: Inform Ubuntu where your Java installation is located.

$ sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jre1.6.0_45/bin/java 1
$ sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.6.0_45/bin/javac 1

Step 10: Inform Ubuntu that this is your default Java installation.

$ sudo update-alternatives --set java /usr/lib/jvm/jre1.6.0_45/bin/java
$ sudo update-alternatives --set javac /usr/lib/jvm/jdk1.6.0_45/bin/javac

Step 11: Update your system-wide PATH.

Edit your /etc/profile file using:

$ sudo gedit /etc/profile

Add the following entries to the bottom of the file:
JAVA_HOME=/usr/lib/jvm/jdk1.6.0_45
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME
export PATH
Save your changes and exit

Step 12:

Reload your system-wide PATH.

$ . /etc/profile

Step 13: Test your new installation.

$ java -version

Response: java version "1.6.0_45"
Java(TM) SE Runtime Environment (build 1.6.0_45-b06)
Java HotSpot(TM) 64-Bit Server VM (build 20.45-b01, mixed mode)

$ javac -version

Response: javac 1.6.0_45