Revision 923527

Change the APIs from char to int character input to match underlying JRE API called. There is no need to narrow the input type argument to the JRE, in fact this causes us to loose support for Unicode supplementary characters. The APIs changed are:
- indexOf(String, char) -> indexOf(String, int)
- indexOf(String, char, int) -> indexOf(String, int, int)
- lastIndexOf(String, char) -> lastIndexOf(String, int)
- lastIndexOf(String, char, int) -> lastIndexOf(String, int, int)
- contains(String, char) -> contains(String, int)