How to Install Java 8 on Ubuntu

Java is a popular programming language used for developing various applications, and installing it on your Ubuntu machine is a straightforward process. In this article, we will guide you through the installation of Java 8 on Ubuntu 20.04 LTS.

Installing Oracle Java 8

To install Oracle Java 8, you can download it from the official Oracle website and follow these steps:

1. Download the Oracle Java 8 package (`.deb` file) from the official Oracle website.

2. Open a terminal on your Ubuntu machine and navigate to the directory where you downloaded the package.

3. Install the package by running the command `sudo apt install ./oracle-java8-installer.deb`.

Installing OpenJDK

Alternatively, you can install OpenJDK 8, which is an open-source implementation of Java. To do this, run the following command:

```

sudo apt-get install openjdk-8-jre

```

This will install the JRE (Java Runtime Environment), which allows you to run Java applications.

Installing JDK

The JDK (Java Development Kit) includes tools useful for developing and testing Java applications. You can install it by running the following command:

```

sudo apt-get install openjdk-8-jdk

```

Verifying the Installation

To verify that Java is installed correctly, you can check the version of Java by running the command `java -version` in your terminal.

Troubleshooting Issues

If you encounter any issues during the installation process or if the command `java` is not found, you can try installing the default JRE using the following command:

```

sudo apt install default-jre

```

Or, if you are getting an error message indicating that a package was not found, you can try searching for it in your terminal by running the command `$ ls /var/cache/apt/archives/sun*`.

In conclusion, installing Java 8 on Ubuntu is a simple process that can be completed using either Oracle's official installer or OpenJDK. By following these steps, you should be able to successfully install and verify Java 8 on your Ubuntu machine.

Ubuntu install java 8