Do you mean
String#replace(java.lang.CharSequence,%20java.lang.CharSequence)? Note that takes a CharSequence as its argument, not a regular expression like the replaceAll method. I think you are passing a regular expression.
I think you can use an ASCII value (well, Unicode) and
you should find " in the "basic Latin" page
here. You would use "\u1234" or '\u1234' depending whether you want it as a
String or a char (or even (char)0x1234!). But you need to check carefully which method you are invoking. I don't think the replace method will allow you to delete the character.
StringBuilder does allow deletions, however.
