public Coffee next() {
try {
return (Coffee) types[rand.nextInt(types.length)].newInstance();
// report programmer error at run time
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public Product next() {
return new Product(
rand.nextInt(1000), "Test", Math.round(rand.nextDouble() * 1000.0) + 0.99);
}