question: public Random ( byte [ ] randomBytes ) { if ( randomBytes == null ) { throw new NullPointerException ( "Random bytes must not be null" ) ; } else if ( randomBytes . length != 32 ) { throw new IllegalArgumentException ( "Random bytes array's length must be 32" ) ; } else { this . randomBytes = Arrays . copyOf ( randomBytes , randomBytes . length ) ; } }
target:  Sets the random bytes explicitly.