Question

Can you help me with a Java Code:

We are to write software for the checkout system of a video game rental store. Note: You are not writing the entire checkout system. You are responsible for writing (and testing!) only the age-restricted part of the system.

The specification for your system is as follows: At the start of each rental transaction, the system will first scan a barcode to do a customer lookup. (Assume other people in the company will be writing the database software. Your software only needs to be passed a date of birth, followed by a progression of ratings. In other words, you will be using test stubs to test your software.)

After the date of birth is received, the system will scan barcodes on each game being rented. This time, instead of being passed a date of birth, the test stubs will return a series of video game ratings. Video game ratings and restrictions are shown in the accompanying table. This process loops until the cashier signal the end of the transaction (in other words, no more games to be scanned).

Ratings:	EC	E	E10	T	M	AO
Age Restrictions:	None	None	Must be 10 or older	Must be 13 or older	Must be 17 or older	Must be 18 or older

The software must (1) correctly calculate an age given a date of birth and today’s date, and (2) correctly determine whether or not each item being rented passes the store’s age restriction policy or not.

Note:

**The program should be continued till the cashiers hit the end, the date format for current date and Birthdate is MM/DD/YYYY**

Answer 1

ANS:

CODE:

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
import java.util.Scanner;

public class VideoRental {

    public static final List<String> ratings = new ArrayList<String>();

    public static void main(String args[]) throws Exception {

        ratings.add("EC");
        ratings.add("E");
        ratings.add("E10");
        ratings.add("T");
        ratings.add("M");
        ratings.add("AO");
        Scanner s = new Scanner(System.in);
        /*
        Prompting user to input first name
         */
        System.out.println("Enter your date of birth in MM/DD/YYYY format ");
        String rawdate  = s.nextLine();
        SimpleDateFormat dateFormat2 = new SimpleDateFormat("MM/dd/yyyy");
        Calendar dob = Calendar.getInstance();
        dob.setTime(dateFormat2.parse(rawdate));
        System.out.println("Your date of birth is is " + dateFormat2.format(rawdate));
        System.out.println("Age is:" + getAge(dob));
        final int age = getAge(dob);
        LocalDate localDate = LocalDate.now();
        System.out.println("Todays current date is " + DateTimeFormatter.ofPattern("MM/dd/yyyy").format(localDate));

        for(String rating: ratings){
            switch(rating){
                case "EC":
                    System.out.println("No Age restrictions" );
                    break;
                case "E":
                    System.out.println("No Age restrictions" );
                    break;
                case "E10":
                    if(age >= 10){
                        System.out.println("He is 10 or older" );
                    }else{
                        System.out.println("He is not 10 or older" );
                    }
                    break;
                case "T":
                    if(age >= 13){
                        System.out.println("He is 13 or older" );
                    }else{
                        System.out.println("He is not 13 or older" );
                    }
                    break;
                case "M":
                    if(age >= 17){
                        System.out.println("He is 17 or older" );
                    }else{
                        System.out.println("He is not 17 or older" );
                    }
                    break;
                case "AO":
                    if(age >= 18){
                        System.out.println("He is 18 or older" );
                    }else{
                        System.out.println("He is not 18 or older" );
                    }
                    break;
            }

            // Use for(;;) to have the repeated calling of the code
            System.out.println("Press 1 to Exit");
            int i = s.nextInt();
            if(i == 1){
                System.exit(0);
            }

        }

    }

    // Returns age given the date of birth
    public static int getAge(Calendar dob) throws Exception {
        Calendar today = Calendar.getInstance();

        int curYear = today.get(Calendar.YEAR);
        int dobYear = dob.get(Calendar.YEAR);

        int age = curYear - dobYear;

        // if dob is month or day is behind today's month or day
        // reduce age by 1
        int curMonth = today.get(Calendar.MONTH);
        int dobMonth = dob.get(Calendar.MONTH);
        if (dobMonth > curMonth) { // this year can't be counted!
            age--;
        } else if (dobMonth == curMonth) { // same month? check for day
            int curDay = today.get(Calendar.DAY_OF_MONTH);
            int dobDay = dob.get(Calendar.DAY_OF_MONTH);
            if (dobDay > curDay) { // this year can't be counted!
                age--;
            }
        }

        return age;
    }


}

OR

CODE:

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import java.util.Calendar;

import java.util.Scanner;

public class GFG

{

public static int calculated_year,calculated_month,calculated_date;

static void findAge(int current_date, int current_month,

int current_year, int birth_date,

int birth_month, int birth_year)

{

int month[] = { 31, 28, 31, 30, 31, 30, 31,

31, 30, 31, 30, 31 };

//if birth date is greater then current

// birth_month, then donot count this month

// and add 30 to the date so as to subtract

// the date and get the remaining days

if (birth_date > current_date)

{

current_month = current_month - 1;

current_date = current_date + month[birth_month - 1];

}

// if birth month exceeds current month,

// then do not count this year and add

// 12 to the month so that we can subtract

// and find out the difference

if (birth_month > current_month)

{

current_year = current_year - 1;

current_month = current_month + 12;

}

// calculate date, month, year

calculated_date = current_date - birth_date;

calculated_month = current_month - birth_month;

calculated_year = current_year - birth_year;

// print the present age

System.out.println("Present Age");

System.out.println("Years: " + calculated_year +

" Months: " + calculated_month + " Days: " +

calculated_date);

}

public static void main(String[] args)

{

String regex = "^(1[0-2]|0[1-9])/(3[01]|[12][0-9]|0[1-9])/[0-9]{4}$";

Scanner input=new Scanner(System.in);

String date;

while(true)

{

System.out.print("Enter Your bday in mm/dd/yyyy format:");

date=input.nextLine();

Pattern pattern = Pattern.compile(regex);

Matcher matcher = pattern.matcher(date);

if(matcher.matches())

break;

else

System.out.println("Invalid date format. Please re-enter date.");

}

// present date

input.close();

Calendar cal = Calendar.getInstance();

int current_month = cal.get(Calendar.MONTH); // 5 int year = cal.get(Calendar.YEAR); // 2016

int current_date = cal.get(Calendar.DATE);

int current_year = cal.get(Calendar.YEAR); // 2016

  

// birth dd// mm// yyyy

String b_day=date.substring(0,date.indexOf("/"));

int birth_date = Integer.parseInt(b_day);

int birth_month=Integer.parseInt(date.substring(date.indexOf("/")+1, 5));

int birth_year = Integer.parseInt(date.substring(6));

  

  

// function call to print age

findAge(current_date, current_month, current_year,birth_date, birth_month, birth_year);

System.out.println("Rating\t\tAligibility");

if(calculated_year>=18)

{

System.out.println("EC\t\tPassed");

System.out.println("E\t\tPassed");

System.out.println("E10\t\tPassed");

System.out.println("T\t\tPassed");

System.out.println("M\t\tPassed");

System.out.println("AO\t\tPassed");

}

else if(calculated_year==17&& calculated_date<18)

{

System.out.println("EC\t\tPassed");

System.out.println("E\t\tPassed");

System.out.println("E10\t\tPassed");

System.out.println("T\t\tPassed");

System.out.println("M\t\tPassed");

}

else if(calculated_year==13&& calculated_date<17)

{

System.out.println("EC\t\tPassed");

System.out.println("E\t\tPassed");

System.out.println("E10\t\tPassed");

System.out.println("T\t\tPassed");

}

else if(calculated_year==10&& calculated_date<13)

{

System.out.println("EC\t\tPassed");

System.out.println("E\t\tPassed");

System.out.println("E10\t\tPassed");

}

else

{

System.out.println("EC\t\tPassed");

System.out.println("E\t\tPassed");

}

}

}

output

$Java-Age Calc/src/GFG.java-Eclipse IDE Eile Edit Source Refactor Navigate Search Projec Bun Window Help Quick Access: E | 巵ち ▽-B D GFGjava × Package Explorer 3 Age Calc Console ittcaLcutatea_year-) sterminated> GFG lJava Application) C:Program Files Javaljdk1.8.0 131bin javaw.exe (21-Sep-2018, 9:14:0S PM) 82 83 Enter Your bday in mm/dd/yyyy format:11/86/1989 Present Age Years: 29 Months: 2 Days: 10 Rating EC JRE System Library ljdk1.8.0 131] System.out.println(Ct tPassed System.out.println(EltitPassed System.out.println(E18 titPassed System.out.println(TthtPassed System.out.printlnMt\tPassed) System.out.println(A0titPassed (defoult package 85 86 Aligibility Passed Passed Passed Passed Passed Passed GFG,javia Game Word Wars GorceryStoreSimple Integer Class Poem Inhenitence Simple Validation for date E10 90 else if(calculated year 178& calcula A0 92 93 94 95 96 System.out.printin(ECYttPassed System.out.println(EltltPassed System.out.println(E1 titPassed System.out.println(TitltPassed) System.out.printinMt tPassed) 98 else if(calculated-year=138& calcula 01 182 183 System.out.printin(ECYttPassed System.out.println(EltltPassed System.out.println( E1 titPassed System .out printlnTt tPassed) else if(calculated year--188& calcula 106 187 System.out.println( ECt tPassed System.out.println(EltitPassed System.out.println(E1 titPassed 110 else 112 System.out.println(ECht tPassed System.out.println(Et\tPassed 114 115 116 118 119 O Type here to search sf ^ ) ENG 21:14 21-09-2018$