Created
February 23, 2015 20:30
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java alex
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| import java.util.Random; | |
| public class BirthdaySimulation | |
| { | |
| public static void main(String [] args) { | |
| Random rand = new Random(); | |
| int month = rand.nextInt(12); | |
| int day = getDayInMonth(month); | |
| int matches = 0; | |
| // Check how many matches we get out of 100 random dates | |
| for (int i = 0; i < 100; i++) { | |
| int month2 = rand.nextInt(12); | |
| int day2 = getDayInMonth(month); | |
| // If month and day are equal, we have a match | |
| if (month == month2 && day == day2) { | |
| matches++; | |
| } | |
| } | |
| System.out.println("We have " + matches + "for month:" + month + " day:" + day); | |
| } | |
| // Get number of days in month, assuming the current year isn't a leap year | |
| public static int getDayInMonth(int month) { | |
| int monthDays[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; | |
| if (month > 11 || month < 0) { | |
| return -1; | |
| } else { | |
| Random rand = new Random(); | |
| return rand.nextInt(monthDays[month]); | |
| } | |
| } | |
| } | |
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