How powerful is Verilog at using parameters to specify designs?

I have a design in mind that would fit in this skeleton:

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module xyz ( result, leftOp, rightOp);

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parameter  integer nmBits = 1;

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localparam integer highBit = nmBits - 1;

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output             result;

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input [ highBit:0] leftOp;

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input [ highBit:0] rightOp;

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// ...

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endmodule

The way (xyz) is designed, this module would work differently for 
different values of (nmBits), but in a way that can be precisely 
defined. In fact, I'm seriously thinking of writing a Java program that 
takes (nmBits) as an input and produces a parameterless verion of (xyz) 
for that version of (nmBits). So I'm wondering, is it a true statement 
that, if one can write such a Java program to produce the equivalent 
(parameterless) Verilog code for any given set of parameters, one can 
also write Verilog code with parameters to do the same thing?