Step-by-step – OpenJDK 13 Installation in Linux Mint 20

Installing

2. 2. Enabling OpenJDK 13 PPA

   Add OpenJDK 13 PPA for Mint GNU/Linux

   Enabling OpenJDK 13 Repo for Mint

   OpenJDK 13 PPA for Mint

3. 3. Installing OpenJDK 13

   Then to Install OpenJDK 13 in Mint
   First, to look up all the available flavors play:

   sudo apt search openjdk-13

   So next for OpenJDK JDK 13 issue:

   sudo apt install openjdk-13-jdk

   Where for the Java Runtime instead:

   sudo apt install openjdk-13-jre

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo
   Now to Check the current Java:

   java -version

   And in output you find it:

   

   Finally, to check for available Java releases:

   sudo apt search openjdk | grep jdk