# Oracle JDK

```html
Important notice regarding Oracle Java 11 and newer: the Oracle JDK license has changed 
starting April 16, 2019. The new license permits certain uses, such as personal use and 
development use, at no cost -- but other uses authorized under prior Oracle JDK licenses 
may no longer be available. 

A FAQ is available here: 
https://www.oracle.com/technetwork/java/javase/overview/oracle-jdk-faqs.html . 

About Oracle Java 10: This version reached the end of public updates, therefore it's no longer 
available for download.
```
 
### Oracle JDK 13 (64bit only!!)

    sudo add-apt-repository ppa:linuxuprising/java
    sudo apt update
    sudo apt install oracle-java13-installer

#### Java version 8
    sudo add-apt-repository ppa:webupd8team/java
    sudo apt update

#### Java version 10
    sudo add-apt-repository ppa:linuxuprising/java
    sudo apt update

#### To install Java 8 execute:
    sudo apt install oracle-java8-set-default

#### To install Java 10 execute :
    sudo apt install oracle-java10-set-default

To make Oracle Java 13 default, install the "oracle-java13-set-default" in case it wasn't automatically installed by the Oracle Java 13 installer:

    sudo apt install oracle-java13-set-default

To skip installing the "oracle-java13-set-default" package when installing oracle-java13-installer, use:

    sudo apt install --no-install--recommends oracle-java13-installer

Don't want Oracle Java 13 to be default any more, but want to have it installed? 
Remove the oracle-java13-set-default package:

    sudop apt remove oracle-java13-set-default

### Managing Java Alternatives

You can have multiple Java installations on one server. You can configure which version is the default for use on the command line by using the update-alternatives command.

    sudo update-alternatives --config java

You can do this for other Java commands, such as the compiler (javac):

    sudo update-alternatives --config javac

### List your current java environment variable settings:

    sudo update-alternatives --get-selections | grep ^java

# Open JDK

### To install Java Open JDK version 11:

    sudo apt install openjdk-11-jdk

### To install Java Open JDK version 11:

    sudo apt install openjdk-8-jdk