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import java.util.Scanner;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.lang.Math;
public class AgeDifference {
public static void main(String[] args) {
SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy"); // Stating the format that will be used
Scanner scanner = new Scanner(System.in);
while (true) {
System.out.println("Write the date in the format: dd-mm-yyyy"); // Ex 20-03-1990
System.out.print("Enter person A's date of birth: ");
String inputPersonA = scanner.nextLine();
System.out.print("Enter person B's date of birth: ");
String inputPersonB = scanner.nextLine();
try {
Date personA = dateFormat.parse(inputPersonA); // The birth date of person A
Date personB = dateFormat.parse(inputPersonB); // The birth date of person B
int ageDiff = (int) ((personB.getTime() - personA.getTime()) / (24 * 60 * 60 * 1000)); // Calculating
// the age difference between person A & B in days
if (ageDiff > 0) // If ageDiff is bigger than 0, it means that person A is older
System.out.println("Person A is older than Person B by " + ageDiff + " days");
else {
// Otherwise person B is older
ageDiff = ageDiff * -1; // Convert ageDiff from negative to positive
System.out.println("Person B is older than Person A by " + ageDiff + " days");
}
break;
}
// If either of the dates are incorrect, the user will get to try again until it is correct
catch (Exception ex) {
System.out.println("Invalid, try again by pressing Enter");
scanner.nextLine();
continue;
}
}
scanner.close();
}
}
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