java replace German umlauts

Question

I have the following problem. I am trying to replace german umlauts like ä, ö, ü in java. But it simply does not work. Her

Answer 1

Your code looks fine, replaceAll() should work as expected.

Try this, if you also want to preserve capitalization (e.g. ÜBUNG will become UEBUNG, not UeBUNG):

private static String replaceUmlaut(String input) {
 
     //replace all lower Umlauts
     String output = input.replace("ü", "ue")
                          .replace("ö", "oe")
                          .replace("ä", "ae")
                          .replace("ß", "ss");
 
     //first replace all capital umlaute in a non-capitalized context (e.g. Übung)
     output = output.replaceAll("Ü(?=[a-zäöüß ])", "Ue")
                    .replaceAll("Ö(?=[a-zäöüß ])", "Oe")
                    .replaceAll("Ä(?=[a-zäöüß ])", "Ae");
 
     //now replace all the other capital umlaute
     output = output.replace("Ü", "UE")
                    .replace("Ö", "OE")
                    .replace("Ä", "AE");
 
     return output;
 }

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