ubuntu java compiler version

To check the version of the Java compiler (javac) on Ubuntu, follow these steps:

1. Open a terminal and run the following command:

javac -version

This will display the version number of the javac compiler.

Note: If you have multiple versions of Java installed on your system, the version of javac that is used may not be the same as the version of the Java runtime (java) that is currently set as the default. To change the default version of javac, you can use the update-alternatives command in a similar way as you would to change the default Java runtime. For example, to change the default javac version to OpenJDK 8, you can run the following command:

sudo update-alternatives --config javac

This will list the available javac versions and allow you to select the one you want to use as the default.