Time for action – installing JDK and configuring the environment variables

To configure the JAVA_HOME and PATH variables, follow these steps:

Installing on a LINUX environment:

1. Install JDK 1.7. You can go to the official Java website (www.java.com), download the installer file and then execute it in your operating system. Or you can execute the following commands in a terminal:

   shell> sudo add-apt-repository ppa:webupd8team/java
   shell> sudo apt-get update
   shell> sudo apt-get install oracle-java7-installer

2. Write the following command in the terminal:

   shell> sudo gedit /etc/environment

3. Add a line in this file that contains the following (or similar, depending on each environment):

   JAVA_HOME="/usr/lib/jvm/java-7-oracle"

4. To the beginning of the value of the PATH variable, add the /usr/lib/jvm/java-7-oracle/bin: string.

   Note

   The separator for the PATH entries in Linux environments is ":".

5. The /etc/environment file should look like this:
   
6. Restart the session.

In Windows...