java - How to install the JDK on Ubuntu Linux

I am trying to install the Java Development Kit (JDK) on Ubuntu Linux distribution, but I am unable to install it.

What are the steps to install it on Ubuntu?

Answer

Referring to Ask Ubuntu question How to set JAVA_HOME for OpenJDK?,

How to install Open JDK (Java developement kit) in Ubuntu (Linux)?

1. Open Terminal from Application Dash or press Ctrl+Alt+T




2. Update repository:

   
   
   

   sudo add-apt-repository ppa:openjdk-r/ppa  # only Ubuntu 17.4 and earlier
   sudo apt update
   




3. Optional: To search available distributions of openjdk, use the following command:

   
   
   

   apt search openjdk
   




4. Install the appropriate version with the following command:

   
   
   

   sudo apt install openjdk-8-jdk
   sudo apt install openjdk-8-source #this is optional, the jdk source code
   




5. For JAVA_HOME (Environment Variable) type command as shown below, in "Terminal" using your installation path...

   
   
   

   export JAVA_HOME=/usr/lib/jvm/java-8-openjdk
   

   
   
   

   (Note: /usr/lib/jvm/java-8-openjdk is symbolically used here just for demostration. You should use your path as per your installation.)




6. For PATH (Environment Variable) type command as shown below, in Terminal:

   
   
   

   export PATH=$PATH:$JAVA_HOME/bin




7. To check your installation:

   
   
   

   java -version