Step-by-step – OpenJDK 11 Installation in Ubuntu 20.04

Managing

3. 3. Managing Java Versions

   So now to Manage Multiple Java on System
   Use the update-alternatives as:

   sudo update-alternatives --config java

   If more than one then choose the wanted Release from list:

   

   And in case of a JDK Setup you may also switch the Java Compiler with:

   sudo update-alternatives --config javac

So Now I’m truly Happy if My Guide could Help you to Install OpenJDK 11 on Ubuntu 20.04!