Lab 13: Java Arrays The Birthday Coincidence Objectives: Java...
Question
Lab 13: Java Arrays
The Birthday Coincidence
Objectives: Java Arrays (chapter 7)
Part 1
Suppose that people enter an empty room until a pair of people share a birthday. On average, how many people will have to enter before there is a match?
Write a program BirthdayCoincidence. java to simulate one experiment
The output of this program is the number of people that were added until a pair has matching birthdays.
Assume birthdays to be uniform random integers between 1 and 365. So, 1 representsJanuary 1; *** 31 represents January 31, 32 represents February 1, 33 represents February 2; and so on until 365 representing December 31.
Part 2
Then write a program BirthdayCoincidenceAverage.java to repeat the experiment many times and estimate the average value.
The number of trials to repeat the experiment should be specified via a command-line argument args [0], or using Scanner, or JoptionPane.showInputDialog()
Try it with several very large numbers of trials, c.g. 10,000, 100,000 or 1,000,000. The output of this program is the average number of people that were added until a birthday match occurred.
The Birthday Coincidence
Objectives: Java Arrays (chapter 7)
Part 1
Suppose that people enter an empty room until a pair of people share a birthday. On average, how many people will have to enter before there is a match?
Write a program BirthdayCoincidence. java to simulate one experiment
The output of this program is the number of people that were added until a pair has matching birthdays.
Assume birthdays to be uniform random integers between 1 and 365. So, 1 representsJanuary 1; *** 31 represents January 31, 32 represents February 1, 33 represents February 2; and so on until 365 representing December 31.
Part 2
Then write a program BirthdayCoincidenceAverage.java to repeat the experiment many times and estimate the average value.
The number of trials to repeat the experiment should be specified via a command-line argument args [0], or using Scanner, or JoptionPane.showInputDialog()
Try it with several very large numbers of trials, c.g. 10,000, 100,000 or 1,000,000. The output of this program is the average number of people that were added until a birthday match occurred.
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import java.util.ArrayList;
/*
* BirthdayCoincidence class
*/
public class BirthdayCoincidence {
// Main method for program execution
public static void main(String[] args) {
// ArrayList to store birthdays
ArrayList<Integer> birthdays = new ArrayList<Integer>();
// Run in a loop
while (true) {
// Person enters with random birthday 1 to 365
int birthday = (int)(Math.
/*
* BirthdayCoincidence class
*/
public class BirthdayCoincidence {
// Main method for program execution
public static void main(String[] args) {
// ArrayList to store birthdays
ArrayList<Integer> birthdays = new ArrayList<Integer>();
// Run in a loop
while (true) {
// Person enters with random birthday 1 to 365
int birthday = (int)(Math.
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