The current generator named as CRAY allows to generate numbers included in the interval from 0 to 1 with period 2^46 and binary modulo exponentiation and multiplication. The selected values for the Lehmer generator:
a = 44 485 709 909 377, c = 0, m = 2^48, X0 = 1.
CBasicRandomValue basicGenerator = new CBasicRandomValue();
for (int i = 0; i < 100000; ++i)
basicGenerator.next();You can also create random variables using a factory, which divides produced sequence of numbers into several parts and gives a better result.
int seed = 1234;
CLinearCongruentGenerator linearGenerator = new CLinearCongruentGenerator(seed);
CBasicRandomValue basicGeneratorFirst = new CBasicRandomValue(linearGenerator);
for (int i = 0; i < 1 << 20; ++i)
basicGeneratorFirst.next();
CBasicRandomValue basicGeneratorSecond = new CBasicRandomValue(linearGenerator);
for (int i = 0; i < 1 << 20; ++i)
basicGeneratorSecond.next();