public static int lastIndexOfIgnoreCase(String s,String subS){
  return lastIndexOfIgnoreCase(s,subS,s.length(),0);
}

public static int lastIndexOfIgnoreCase ( String s , String subS ) { return lastIndexOfIgnoreCase ( s , subS , s . length ( ) , 0 ) ; }
finds last index of a substring in the given source string with ignored case .
