question: public double nextDouble ( double degreesOfFreedom ) { if ( degreesOfFreedom <= 0.0 ) throw new IllegalArgumentException ( ) ; double u , v , w ; do { u = 2.0 * randomGenerator . raw ( ) - 1.0 ; v = 2.0 * randomGenerator . raw ( ) - 1.0 ; } while ( ( w = u * u + v * v ) > 1.0 ) ; return ( u * Math . sqrt ( degreesOfFreedom * ( Math . exp ( - 2.0 / degreesOfFreedom * Math . log ( w ) ) - 1.0 ) / w ) ) ; }
target:  Returns a random number from the distribution; bypasses the internal state.