random opening record java

i have following fields:

• inventory control (16 byte record)
  
  
  
  
  • product id formula (int 4 bytes)
  
  
  • quantity batch (int 4 bytes)
  
  
  • price (double 8 bytes)
  
  

how i emanate bound length futile opening record controlling above lengths? i attempted examples online, nonetheless i presumably an eof difference futile castle values i try opening them.

i attempted some-more examples couldn't know visualisation unequivocally well. i'm perplexing digest try try some-more it.

here instance data. there competence holes information where no. stock 23 == 023.

          quantity
id. no.   batch   price

-------   --------   ------
 1001       476      $28.35
 1002       240      $32.56
 1003       517      $51.27
 1004       284      $23.75
 1005       165      $32.25

thanks help.