How to Install Java 8 on AWS Cloud9 IDE

By PreetiAWS, DevOps
Install Java 8 on AWS Cloud9 IDE

How to Install Java 8 on AWS Cloud9 IDE

This quick post will help you install Java 8 on AWS cloud9 IDE. By default, cloud9 is on the Linux platform and it runs Java 7. So you need to install java8 to get started with your development.

Install Java 8 on AWS Cloud9 IDE

While creating a cloud9 environment there are three options for platforms to choose from as you can see in the above screenshot as well.

  • Amazon Linux
  • Amazon Linux 2
  • Ubuntu Server 18.04 LTS

Please note that, if you create a cloud9 IDE using an Ubuntu server, it already comes with java8. However, I will provide installation commands for Linux as well as the Ubuntu server for your reference.

If you want to have the command straightaway, you can find them below for Linux as well as Ubuntu Server.

However, If you would like to understand each command and see the installation step by step, keep reading the post till the end.

For Amazon Linux:

java -version
sudo yum -y update
sudo yum -y install java-1.8.0-openjdk-devel
sudo update-alternatives --config java
sudo update-alternatives --config javac
java -version

For Ubuntu Server:

java -version
sudo apt update
sudo apt install -y openjdk-8-jdk
sudo update-alternatives --config java
sudo update-alternatives --config javac
java -version

Steps to Install Java 8 on AWS Cloud9 IDE

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Step 1: Check Java Version

I always start by checking the Java version. you can run the below command for Linux/Ubuntu

java -version

When you run this command in a newly created cloud9(Linux) environment, you will see output like below.

Install Java 8 on AWS Cloud9 IDE

This proves that by default cloud 9 on Linux has Java7 installed. So let’s proceed with step 2.

Step 2: Install Latest Security Updates

After checking the java version now we know that we need to install java8. But before doing that let’s install the latest security updates. It’s a good security practice to update the latest security updates.

Amazon Linux:

sudo yum -y update

Ubuntu Server:

sudo apt update

Step 3: Install OpenJDK 8

The latest security updates are installed so let’s install openjdk8 now

Amazon Linux:

sudo yum -y install java-1.8.0-openjdk-devel

Ubuntu:

sudo apt install -y openjdk-8-jdk

Step 4: Switch the default Java env to OpenJDK 8

Run the below command to switch or upgrade the command line versions of the Java runner(java) and compiler(javac).

sudo update-alternatives --config java
sudo update-alternatives --config javac

Choose a selection number which contains java8 as shown below screenshot.

install java8 on cloud9

Step 5: Check the Java version Again

After doing the selection, let’s run the java – version again to ensure it’s pointing to opnejdk8 now.

java -version

Step 6: Remove Java7 Package

I always like to keep my environment clean and keep only the required things. As I don’t need java7 anymore so I am removing it with the below command

For Amazon Linux:

sudo yum remove java-1.7.0-openjdk-devel

With the removal of java7 from the cloud9 IDE, installation of java8 in cloud9 IDE is complete.

Conclusion:

In this post, you learnt to install Java 8 on AWS cloud9 IDE. We also provided a set of commands for Linux as well as a Ubuntu server to install java8.

I hope this post was useful to you. In case of any issues please add in the comment section. We would love to resolve your issue.

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