![]() ![]() Let me know your thoughts on the above solutions. So now you know how to use the equation for GPA. Divide the grade total (1,644) by the total number of hours (500): 1644/500 3.3. ![]() In above examples, we learned to write a program to calculate the age of a person in java. Put together the total number of hours for all academic disciplines taken: 100 + 200 + 70 + 80 + 50 500. SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy") Public static void main(String args) throws ParseException Int today = now.get(Calendar.DAY_OF_MONTH) ĭays = now.getActualMaximum(Calendar.DAY_OF_MONTH) - birthDay.get(Calendar.DAY_OF_MONTH) + today if month difference is in negative then reduce years by oneĭays = now.get(Calendar.DATE) - birthDay.get(Calendar.DATE) Įlse if (now.get(Calendar.DATE) < birthDay.get(Calendar.DATE)) Int birthMonth = birthDay.get(Calendar.MONTH) + 1 Int currMonth = now.get(Calendar.MONTH) + 1 Years = now.get(Calendar.YEAR) - birthDay.get(Calendar.YEAR) c:bluejcalculator project: calculator Calculator.java Calculator.class. Long currentTime = System.currentTimeMillis() BlueJ projects A BlueJ project is stored in a directory on disk A BlueJ. Private static Age calculateAge(Date birthDate)Ĭalendar birthDay = Calendar.getInstance() ītTimeInMillis(birthDate.getTime()) Second class is AgeCalculator itself which has a private method which accept a person’s date of birth and return the Age instance having person’s age information. Return years + " Years, " + months + " Months, " + days + " Days" Public Age(int days, int months, int years) We can add parameter validation as well so that it does not accept negative values. I have made the default constructor private and provided a constructor which accepts days, months, years. I have made some effort by adding Age class to make this solution look professional. The low performance (not measured accurately) can be also a downside. Though it works fine but code is not very readable. I will not recommend this method for production-class applications. This solution is very basic and should be used for only learning the logic of calculation. Period p = Period.between(birthday, today) Given below is a Java 8 program to calculate the age of a person from the date of birth. LocalDate birthday = LocalDate.of(1980, Month.JANUARY, 1) // Birth date In Java 8, Period class is used to define an amount of elapsed time with date-based values (years, months, days). LocalDate today = LocalDate.now() // Today's date is 10th Jan 2022 Note that birthday is inclusive, while today date is exclusive in the calculated period. Once the Period is obtained, we can get the difference between both dates in desired metrics. We are using Period to store the difference between today’s date and the person’s date of birth. The program uses Period class to store the differences between two LocalDate instances. In Java 8, Period class is used to define an amount of elapsed time with date-based values (years, months, days). ![]()
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