Lab #11 (Exercise 12-2)

Calculate the user's age

Due Date: Wednesday of Week 4
10 points

In this lab, you'll write a program that accepts a person's birth date from the console and displays the person's age in years. To make that easier to do, we'll give you a class that contains the code for accepting the birth date. The console output for the program should look something like this:

Open the AgeCalculatorApp class:

Validator.java

import java.util.Scanner;

public class Validator
{
    public static String getString(Scanner sc, String prompt)
    {
        System.out.print(prompt);
        String s = sc.next();        // read the first string on the line
        sc.nextLine();               // discard any other data entered on the line
        return s;
    }

    public static String getLine(Scanner sc, String prompt)
    {
        System.out.print(prompt);
        String s = sc.nextLine();        // read the whole line
        return s;
    }

    public static int getInt(Scanner sc, String prompt)
    {
        boolean isValid = false;
        int i = 0;
        while (isValid == false)
        {
            System.out.print(prompt);
            if (sc.hasNextInt())
            {
                i = sc.nextInt();
                isValid = true;
            }
            else
            {
                System.out.println("Error! Invalid integer value. Try again.");
            }
            sc.nextLine();  // discard any other data entered on the line
        }
        return i;
    }

    public static int getInt(Scanner sc, String prompt,
    int min, int max)
    {
        int i = 0;
        boolean isValid = false;
        while (isValid == false)
        {
            i = getInt(sc, prompt);
            if (i <= min)
                System.out.println(
                    "Error! Number must be greater than " + min);
            else if (i >= max)
                System.out.println(
                    "Error! Number must be less than " + max);
            else
                isValid = true;
        }
        return i;
    }

    public static double getDouble(Scanner sc, String prompt)
    {
        boolean isValid = false;
        double d = 0;
        while (isValid == false)
        {
            System.out.print(prompt);
            if (sc.hasNextDouble())
            {
                d = sc.nextDouble();
                isValid = true;
            }
            else
            {
                System.out.println("Error! Invalid decimal value. Try again.");
            }
            sc.nextLine();  // discard any other data entered on the line
        }
        return d;
    }

    public static double getDouble(Scanner sc, String prompt,
    double min, double max)
    {
        double d = 0;
        boolean isValid = false;
        while (isValid == false)
        {
            d = getDouble(sc, prompt);
            if (d <= min)
                System.out.println(
                    "Error! Number must be greater than " + min);
            else if (d >= max)
                System.out.println(
                    "Error! Number must be less than " + max);
            else
                isValid = true;
        }
        return d;
    }
}

Add code to this class that gets the current date and then uses the current year to validate the birth year the user enters. the user should not be allowed to enter a year after the current year or more than 110 years before the current year.

Add code to create, format, and print the user's birth date and to format and print the current date.

Add code to calculate and print the user's age.

Compile the class. Then run it for a variety of dates to be sure it works.

Include in your program the following comments:

Name of program
Team's name with all the names of the members (e.g. Team A: John Doe, Jane Smith, etc.)
Current Date
Computer system and compiler you are using
Brief description of the program

Compile and run the Java program.

Take a screen capture by hitting simultaneously the keys Alt and Print Screen (Prt Sc) of the output results (console) and paste it in MS Paint. Save it as a gif file.

When you are ready, upload the java program and the gif file by clicking the link below:

Upload Lab

I cannot grade if I don't get the files and receive your email.