Step-by-step – Oracle JDK 11 Installation in Ubuntu 20.04 Guide

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5. 5. Switching to Java 11

   Now to Switch Java to JDK 11
   This is Valid only if you have to Manage more than One Java Releases:

   sudo update-alternatives --config java

   And for the Java Compiler instead:

   sudo update-alternatives --config javac

   Choose the Number entry corresponding to Oracle JDK 11.
   Test your Java 11 Installation:

   java --version

   
   

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