Intellij IDEA: "unmappable character for encoding UTF-8" compiling ISO-8859-1 files

Question

I have a mixed-encoding source tree and I'm getting the warning above for some of my source files. I managed to sucessfully set the encoding for those files to ISO 8859-1 and, after invalidating IDEA's caches, they now display correctly in the editor. However, when I compile, I still get the error message.

Production builds use ant and it's not an issue there, but it means I can't "make" in the IDE. Is there a way to get IDEA to compile these correctly, or failing that, drop the error down to a warning?

Answer 1

I solved this issue adding this property in IntelliJ option panel Compiler/Java Compiler :

Additional command line parameters : -encoding ISO-8859-1

Answer 2

I have UTF-8 encoding in encoding.xml as follows, but still not working. keeps getting error "Error: java: error: unmappable character (0xFE) for encoding UTF-8"

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="Encoding" defaultCharsetForPropertiesFiles="UTF-8">
    <file url="file://$PROJECT_DIR$" charset="UTF-8" />
    <file url="PROJECT" charset="UTF-8" />
  </component>
</project>