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Java defined int as a 32-bit number because that is generally large enough to hold the information you need.

The size of an int in C may actually have either 16 or 32 bits, depending on the implementation. Basically, the specifications for any C implementation in UNIX must have 32-bit ints, while the ISO C standard only requires 16-bit ints. The stdint.h and limits.h files exist exactly because not all implementations are the same, and these files will define the min/max values of the integral types.

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