question: public PDFXref ( byte [ ] line ) { if ( line == null ) { id = - 1 ; generation = - 1 ; } else { id = Integer . parseInt ( new String ( line , 0 , 10 ) ) ; generation = Integer . parseInt ( new String ( line , 11 , 5 ) ) ; } compressed = false ; }
target:  create a new PDFXref, given a sequence of bytes representing the fixed-width cross reference table line