How to Install Oracle Java JRE on Ubuntu Linux

Installing Java Manually

1. 
   Open the Java download site. Go to https://java.com/download in your computer's web browser.
2. 
   Click Free Java Download. It's a red button in the middle of the page. Doing so opens the Downloads page.
3. 
   Click the Linux link. This option is near the middle of the page. Clicking it should prompt the Java folder to begin downloading.

   1. You may first have to click Save to prompt the download to begin.
4. 
   Open the "Downloads" folder. Click the Files app icon—which resembles a grey filing cabinet drawer on the left side of the screen—then double-click the "Downloads" folder.
5. 
   Extract the downloaded folder. Right-click the "jre-#####-linux" folder, then click Extract Here in the resulting drop-down menu. You should see a new, regular folder with a similar name appear in the "Downloads" folder.
6. 
   Move the extracted folder if necessary. If you want to install Java in a location other than the "Downloads" folder, do the following:

   1. Click once the extracted folder to select it.
   2. Press Ctrl+X to cut the folder.
   3. Go to the folder you want to use as an installation location and open it.
   4. Press Ctrl+V to paste in the extracted Java folder.
7. 
   Find the extracted folder's "bin" folder. Open the extracted folder, then double-click the folder with the Java version number as its name. This will open the Java folder; you should see a folder entitled "bin" here.
8. 
   Find the "bin" folder's path. To do so:

   1. Right-click the "bin" folder.
   2. Click Properties.
   3. Expand the "Properties" window by clicking and dragging right its right side until the entire "Location" path is visible.
   4. Select the "Location" path by clicking and dragging your mouse across it.
   5. Press Ctrl+C to copy the path.
9. 
   Open the ".profile" document. The easiest way to do this is through Terminal:

   1. Open Terminal.
   2. Type in gedit .profile and press ↵ Enter.
10. 
    Create a new line at the bottom of the document. Scroll all the way down to the bottom of the document, then click below the bottom text entry.
11. 
    Enter the Java "Home" path. The home path is the line export JAVA_HOME=/path where "/path" refers to the path you copied from the "bin" folder; you can paste in the copied path by pressing Ctrl+V. Your end result should resemble something like the following:^[1]

    1. export JAVA_HOME=/home/name/java/jre1.8.0_181
12. 
    Press ↵ Enter to create a new line. This new line should be directly beneath the "export JAVA_HOME=" line.
13. 
    Specify the PATH variable. Type in PATH="$PATH:$JAVA_HOME/bin" and then press ↵ Enter.
14. 
    Click Save. It's in the top-right corner of the window. Doing so saves your changes to the ".profile" document.
15. 
    Restart your computer. This will apply your changes, thus installing Java:

    1. Click
       
       in the top-right corner of the screen.
    2. Click
       
       in the resulting drop-down menu.
    3. Click Restart when prompted.