public FormatFlagsConversionMismatchException(String f, char c) {if (f == null) {throw new NullPointerException();}this.f = f;this.c = c;}

public FormatFlagsConversionMismatchException(string f, char c){if (f == null){throw new System.ArgumentNullException();}this.f = f;this.c = c;}
