Summary

Drop support for "7" from javac's -source, -target, and --release options.

Problem

JDK 7 shipped over a decade ago; continued support for that 7 increases maintenance costs of javac and is outside of the spirit of the policy published in JEP 182.

Solution

Drop the 7 from the set of supported values..

Specification

The value "7" is not listed in the relevant javac -help output:

  --release <release>
        Compile for the specified Java SE release. Supported releases: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
...
  --source <release>, -source <release>
        Provide source compatibility with the specified Java SE release. Supported releases: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
...
  --target <release>, -target <release>
        Generate class files suitable for the specified Java SE release. Supported releases: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20