Research of informations about java.util.Random

Damien W damien.wojtowicz at gmail.com
Thu Dec 18 08:10:25 UTC 2014


Hello,

I found on Javadoc (java.util.Random) the linear congruential generator
formula which is:

seed = (seed * 0x5DEECE66DL + 0xBL) & ((1L << 48) - 1)

I'd like to know why these numbers were chosen (0x5DEECE66D, 0xB), why
are they in hexadecimal and why is there a bit-to-bit comparison.

Best regards,

Damien Wojtowicz


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