Java generating “random” numbers that don't repeat for 2^48 period

Question

Basically I want to generate random numbers that won\'t ever repeat for a very long period (I don\'t want to use a sequence) like for example the LCG that java uses:

Answer 1

Not for that LCG, since you are modding out by 2^48 each time you call it (and thus the period/state is at most 2^48 in length). If you want a better random number generator, you could try the Mersenne twister:

http://en.wikipedia.org/wiki/Mersenne_twister

The standard MT19937 has a period of 2^19937-1 (!!!) That should be more than you will ever need.