AC11-XMLPersona/.idea/compiler.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="CompilerConfiguration">
    <bytecodeTargetLevel target="11" />
  </component>
  <component name="JavacSettings">
    <option name="ADDITIONAL_OPTIONS_OVERRIDE">
      <module name="XMLAct11.main" options="--add-modules java.xml" />
    </option>
  </component>
</project>