How to Install Java (OpenJDK 21) on Linux via Terminal

Installing Java on Linux

• 💡 Installing Java on Linux is a straightforward process that can be done using the terminal.
• 🚀 The guide demonstrates how to check for existing Java installations and available OpenJDK versions.

Checking for Java Installation

• 🔍 To check if Java is already installed, open the terminal and type java -version.
• ⚠️ If Java is not found, the system will often suggest available installation commands.

Installing OpenJDK 21

• 🎯 The specific command to install OpenJDK 21 (headless) is sudo apt install openjdk-21-jdk-headless.
• 🔑 After entering the command, you will be prompted to enter your password and confirm the installation by typing 'Y'.
• 📊 The installation progress will be displayed in the terminal.

Verifying the Installation

• ✅ Once the installation is complete, verify it by running java -version again.
• 💻 The output should now show that Java is installed, confirming the successful setup.