How can i include (constant) primitive data tables in a class?

I have some classes that need a bunch of data tables to do their work (basically arrays of primitives, byte[], short[], int[] and float[]).

Some of the tables are relatively large. Initializing them in the code blows up the class fil开发者_JS百科e, and in some cases it also exceeds the size limit for the class initializer.

Currently i have stored the data in files and use getResourceAsStream() to read the files in a static block.

Is there a better way that makes the data inseparable from the class file? There is no need to ever replace the data independently from the class.

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The use of class resources sounds perfectly appropriate. They are abused for many purposes, but this is a great application.

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maybe you can encode the data in a string literal (64K limit).

final byte[] table = decode("20,5F,A9,3D,E3.........");

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I think it depends on the situation. For something like DES or AES for example, the tables are actually intrinsic to the algorithm: to separate them from the code that uses them doesn't make much sense in my eyes. In these cases the table isn't really "data": they're code in more ways.

When I wrote a DES implementation, I still did want to get them out of the way a bit so I included them as static members of a package-private class in the same package. You can even do a static import then and use the arrays as if they're declared right there in your class.