How to Install JDK 11 on Ubuntu via Command Line

What are the steps to install OpenJDK 11 on an Ubuntu system using the command line?

Installing OpenJDK 11 on Ubuntu can be accomplished using terminal commands. The OpenJDK package is the reference implementation of the Java Platform, which is widely used for developing Java-based applications.

```bash
# Update the package index
sudo apt update

# Install OpenJDK 11
sudo apt install openjdk-11-jdk

# Verify the installation
java -version
```

Solutions

• Open your terminal.
• To install OpenJDK 11 on Ubuntu, you can use the built-in package manager. Run the command:
• ```bash sudo apt update sudo apt install openjdk-11-jdk ```
• After the installation, verify the Java installation with:
• ```bash java -version ```
• You can also set up an Oracle Java PPA if you require the Oracle JDK specifically:
• ```bash sudo add-apt-repository ppa:linuxuprising/java sudo apt update sudo apt install oracle-java11-installer ```
• This will install the Oracle version of Java 11.
• To set Oracle Java 11 as the default, run:
• ```bash sudo apt install oracle-java11-set-default ```

Mistake: Forgetting to update the package index before installation

Solution: Always run `sudo apt update` before installing new packages.

Mistake: Confusion between OpenJDK and Oracle JDK versions

Solution: Make sure to specify `openjdk` or `oracle-java` based on your needs.

Mistake: Not checking system requirements or compatibility issues

Solution: Check the specific Ubuntu version compatibility with the JDK version you intend to install.