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Asked by NHBFighter in Java Programming Language, Main-Frame Programming Languages, COBOL Programming Language
I have been given the task of recreating a number of mainframe files that are currently created by Cobol and stored in EBCDIC format. We are re-designing a legacy system and the system creates several files that are pushed out to other systems which are not changing, so the file format needs to remain the same as it is today.
I have been given some documentation that describes the file layout in a manner such as:
field1 PIC X(4)
field2 PIC S9(03)V99 COMP-3.
field3 PIC S9(07) COMP-3.
field4 PIC S9(4)V9
I have a general idea what these formats mean, X(4) represents a 4 character string (abcd) where each character is represented has a single byte. S9(07) represents a 7 digit signed integer (1254782) which is represented by 4 bytes. And S9(4)V9 is a decimal number with one digit after the decimal (1234.5). I know that COMP-3 means that its a packed field (the details of what that really means eludes me a bit).
I need to able to construct these files using Java running on a Unix machine can any one offer me some guidance on the best way to approach it.
Thanks
David
20091021-EE-VQP-81 / EE_QW_2_20070628