Windows

Install JDK and JRE

1. Download the corresponding installer from oracle.

   

2. Execute Installer to install. Quite easy. Note that the installer will install both the JDK and the corresponding JRE.

Set Path

1. Update the environment variables PATH. For me I just need to add C:\Program Files\Java\jdk-1.8\bin to my User variable.

Ubuntu

Install JDK and JRE

JDK

1. Download the corresponding file from oracle. For Ubuntu users, please download the “Compressed Archive” File.

   

2. Uncompress the .tar.gz using command tar zxvf your-name.tar.gz. Then move all the file to a new installation directory if you like. For me, it’s /usr/lib/jvm/jdk-1.8-oracle-x64.

JRE

1. Download the corresponding “Compressed Archive” file from oracle.

   

2. Uncompress the file and move it to the installation directory. For me it’s /usr/lib/jvm/jre-1.8-oracle-x64

Note that x64 can be replaced to your architecture.

Set Path

1. Add this line to your ~/.bashrc (Note to change the directory to yours)

    export PATH=/usr/lib/jvm/JDK-directory/bin:$PATH
   

2. Reload using source ~/.bashrc

References

1. https://docs.oracle.com/javase/8/docs/technotes/guides/install/install_overview.html#A1097144
2. https://docs.oracle.com/cd/E19215-01/820-2215/6ndr6ai1m/index.html
3. https://media.pearsoncmg.com/ph/esm/ecs_liang_ijp_11/cw/content/supplements/Supplement1bInstallingJDK8.pdf