public UnknownFormatFlagsException(String f) {if (f == null) {throw new NullPointerException();}flags = f;}

public UnknownFormatFlagsException ( String f ) { if ( f == null ) { throw new NullPointerException ( ) ; } flags = f ; }
public UnknownFormatFlagsException(string f){if (f == null){throw new System.ArgumentNullException();}flags = f;}
