How to set the default Java version on Linux

  1. Open a new Terminal Window
  2. Execute the following command:
    sudo update-alternatives --config java
  3. Output similar to the below will show:
    There are 4 choices for the alternative java (providing /usr/bin/java).
      Selection    Path                                            Priority   Status
      0            /usr/lib/jvm/java-8-oracle/jre/bin/java          1092      auto mode
    * 1            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1071      manual mode
      2            /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java   1081      manual mode
      3            /usr/lib/jvm/java-8-oracle/jre/bin/java          1092      manual mode
      4            /usr/lib/jvm/java-9-openjdk-amd64/bin/java       1091      manual mode
    Press <enter> to keep the current choice[*], or type selection number:
  4. Enter the number next to your preferred version and hit the Enter key
  5. Now the default Java version will be changed.

Image Credits: Photo by Isis França on Unsplash.

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