Make an original Java + Javadoc plz

P-1.29 The birthday paradox says that the probability that two people in a room will have the same birtday is more than halr, provided n, the number of people in the room, is more than 23. This property is not really a paralox, but many people find it surprising. Design a Java program that can test this paradox by a series of experiments on randomly generated birthdays, which test this paradox for n 5,0,5,20,...,100