Eclipse: Invalid character constant

[Eric Grobler]

Hi Everyone,

Some language specific classes like GermanLightStemmer has invalid character
compiler errors for code like:
      switch(s[i]) {
        case 'ä':
        case 'Ã ':
        case 'á':
in Eclipse with JDK 1.6

How do I get rid of these errors?
Thanks & Regards

Ericz