public ProperBigFractionFormat(final NumberFormat format){
  this(format,(NumberFormat)format.clone(),(NumberFormat)format.clone());
}

public ProperBigFractionFormat ( final NumberFormat format ) { this ( format , ( NumberFormat ) format . clone ( ) , ( NumberFormat ) format . clone ( ) ) ; }
create a proper formatting instance with a custom number format for the whole , numerator , and denominator .
