How to Install Java 11 on Ubuntu

Installing Oracle Java involves a straightforward process of downloading, installing, and verifying the Java Runtime Environment (JRE) on your Ubuntu system. In this tutorial, we will guide you through the steps to install Java 11 on Ubuntu.

Step 1: Download and Install Java

To begin with, you need to download the OpenJDK package for Ubuntu from the official Oracle website. You can also use the `sudo apt-get update` command to update your system's package list before downloading.

Once downloaded, open your terminal and run the following commands one by one:

```

sudo apt install openjdk-11-jdk openjdk-11-jre

```

You can replace '11' with the Java version of your requirement. In this example, we are installing Java 11.

Step 2: Set Environment Variables

After installation, you need to set the `JAVA_HOME` and `JRE_HOME` environment variables to your system path so that Java becomes accessible from anywhere in your computer. To do this, open your terminal and edit the `/etc/environment` file using the nano command:

```

sudo nano /etc/environment

```

Append the following lines to the environment file and save it:

```

JRE_HOME=/usr/lib/jvm/java-11-openjdk-amd64/jre

JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64

```

Step 3: Verify Java Installation

To verify the version of Java installed on your system, run the following command in your terminal:

```

java -version

```

You should see the version of installed Java as shown in the example below:

```

openjdk 11.0.12 2021-07-20 OpenJDK 64-Bit Server VM (build 25.292-b10, mixed mode)

```

In this tutorial, we have learned how to install Java 11 on Ubuntu using the OpenJDK package. You can use this package for both personal and commercial purposes without needing a license from Oracle. However, if you want to use the official Oracle JDK in a commercial setting, you may need to buy a license.

Note that starting from Java 11, Oracle uses a new commercial license for Java. Therefore, it is recommended to install OpenJDK instead of Oracle JDK unless you have a valid commercial license.

Install java 11 ubuntu