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help-center-docs/software/java/en.md

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title = "Java"
lastmod = "2017-07-22T16:28:23+03:00"
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# Java
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This article covers obtaining open source Java as well as Oracle Java.
## Installation
If you are looking for OpenJDK or OpenJRE, install `openjdk-8` from the repository. The instructions below are for Oracle Java.
You can set up Java by following the instructions below:
## JRE
Grab the Java Runtime Environment (JRE) as `.tar.gz` from the [Oracle Download Page](http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html).
Extract JRE and move it to /opt:
``` bash
cd ~/Downloads
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tar xf jre-8u131-linux-x64.tar.gz
sudo mv jre1.8.0_131 /opt/
sudo ln -svf /opt/jre1.8.0_131/bin/java /usr/bin/java
```
To enable Java in Firefox:
``` bash
mkdir -p ~/.mozilla/plugins
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ln -s /opt/jre1.8.0_131/lib/amd64/libnpjp2.so ~/.mozilla/plugins/libnpjp2.so
```
## JDK
Grab the Java Development Kit (JDK) as `.tar.gz` from the [Oracle Download Page](http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html).
Extract JDK and move it to /opt:
``` bash
cd ~/Downloads
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tar xf jdk-8u131-linux-x64.tar.gz
sudo mv jdk1.8.0_131 /opt/
sudo ln -svf /opt/jdk1.8.0_131/bin/java /usr/bin/java
```
To enable Java in Firefox:
``` bash
mkdir -p ~/.mozilla/plugins
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ln -s /opt/jdk1.8.0_131/jre/lib/amd64/libnpjp2.so ~/.mozilla/plugins/libnpjp2.so
```