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Compare Dates in Java

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i want to write my thesis. 2.1K likes. Our team possesses sufficient knowledge with expertise to complete the needs of students by understandings their... In this article, we will show you how to compare two dates in Java.

DLTK's visit here Paper. Looking for a way to create themed writing paper? The next few steps will allow you to choose a theme for the top and bottom The Date class represents a specific instant in time, with millisecond precision — a milliseconds value represents the number of milliseconds that have passed since January 1, 1970 00:00:00.000 GMT. It provides multiple methods to handle date and time comparison.

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Date Comparison until Java 7

1. Using Date.compareTo():

  1. It returns a value ‘0’ if both dates are equal.
  2. It returns a value greater than 0 or positive number if date1 is after the date2.
  3. It returns a value less than 0 or negative number if date1 is before the date2.

Home Accounting Assignment Help Online. Accounting Assignment Help Online. The moment you think who would cervical dissertation vaccine, import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class DateCompareToExample { public static void main(String[] args) throws ParseException { SimpleDateFormat sdFormat= new SimpleDateFormat("yyyy-MM-dd"); Date date1 = sdFormat.parse("2018-01-18"); Date date2 = sdFormat.parse("2012-10-10"); System.out.println("Date 1: " + sdFormat.format(date1)); System.out.println("Date 2: " + sdFormat.format(date2)); if (date1.compareTo(date2) > 0) { System.out.println("Date 1 is after Date 2"); } else if (date1.compareTo(date2) < 0) { System.out.println("Date 1 is before Date 2"); } else if (date1.compareTo(date2) == 0) { System.out.println("Date 1 is equal to Date 2"); } } }

OUTPUT:

value at risk master thesis UK is the heart and soul of various promising scholars who are desperately seeking some support to accomplish in the field Date 1: 2018-01-18 Date 2: 2012-10-10 Date 1 is after Date 2

2. Using Date.before(), Date.after() and Date.equals():

http://sumberfood1.com/?personal-statement-help-sheet & Custom Term Paper Writing Service. Get term paper, essay writing help, dissertation writing and all kind of academic writing These method is simple and very straightforward to compare two dates.

  1. Date.before() – It returns true if date1 comes before date2; false otherwise.
  2. Date.after() – It returns true if date1 comes after date2; false otherwise.
  3. Date.equal() – It returns true if two dates are the same; false otherwise.

import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class DateComparisonExample { public static void main(String[] args) throws ParseException { SimpleDateFormat sdformat = new SimpleDateFormat("yyyy-MM-dd"); Date date1 = sdformat.parse("2017-02-31"); Date date2 = sdformat.parse("2018-11-31"); System.out.println("Date 1 : " + sdformat.format(date1)); System.out.println("Date 2 : " + sdformat.format(date2)); if (date1.after(date2)) { System.out.println("Date 1 is after Date 2"); } if (date1.before(date2)) { System.out.println("Date 1 is before Date 2"); } if (date1.equals(date2)) { System.out.println("Date 1 is equal Date 2"); } } }

OUTPUT:


Date 1 : 2017-03-03
Date 2 : 2018-12-01
Date 1 is before Date 2

3. Using Calendar.before(), Calendar.after() and Calendar.equals().

The java.util.Calendar class provides methods that work in the same way as described above for the java.util.Date class.

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class CalendarCompareDateExample {
	
	public static void main(String[] args) throws ParseException {

		SimpleDateFormat sdFormat = new SimpleDateFormat("yyyy-MM-dd");
		Date date1 = sdFormat.parse("2018-05-31");
		Date date2 = sdFormat.parse("2012-02-31");

		System.out.println("Date 1 : " + sdFormat.format(date1));
		System.out.println("Date 2 : " + sdFormat.format(date2));

		Calendar calendar1 = Calendar.getInstance();
		Calendar calendar2 = Calendar.getInstance();
		calendar1.setTime(date1);
		calendar2.setTime(date2);

		if (calendar1.after(calendar2)) {
			System.out.println("Date 1 is after Date 2");
		}

		if (calendar1.before(calendar2)) {
			System.out.println("Date 1 is before Date 2");
		}

		if (calendar1.equals(calendar2)) {
			System.out.println("Date 1 is equal Date 2");
		}
	}
	
}

OUTPUT:


Date 1 : 2018-05-31
Date 2 : 2012-03-02
Date 1 is after Date 2

Date Comparison in Java 8

In Java 8, java.time.LocalDate, java.time.LocalTime and java.time.LocalDateTime classes have methods that we can use to compare two dates.

4. Using Java 8 isBefore(), isAfter(), isEqual() and compareTo() methods

  1. date1.isAfter( date2 ) – It returns true if date1 comes after date2; false otherwise.
  2. date1.isBefore( date2 ) – It returns true if date1 comes before date2; false otherwise.
  3. date1.isEqual( date2 ) – It returns true if two dates are the same; false otherwise.
  4. date1.compareTo( date2 ) – It returns a value greater than 0 if date1 comes after date2; otherwise value less than 0. Returns value ‘0’ means both dates are equal.
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;

public class CompareDateExample {
	
	public static void main(String[] args) {
		
        DateTimeFormatter sdf = DateTimeFormatter.ofPattern("yyyy-MM-dd");
        LocalDate date1 = LocalDate.of(2017, 12, 31);
        LocalDate date2 = LocalDate.of(2016, 03, 31);

        System.out.println("date1 : " + sdf.format(date1));
        System.out.println("date2 : " + sdf.format(date2));

        System.out.println("// Using isAfter(), isBefore(), isEqual()");
        if (date1.isAfter(date2)) {
            System.out.println("Date1 is after Date2");
        }

        if (date1.isBefore(date2)) {
            System.out.println("Date1 is before Date2");
        }

        if (date1.isEqual(date2)) {
            System.out.println("Date1 is equal Date2");
        }

        System.out.println("// using compareTo()");
        if (date1.compareTo(date2) > 0) {

            System.out.println("Date1 is after Date2");

        } else if (date1.compareTo(date2) < 0) {

            System.out.println("Date1 is before Date2");

        } else if (date1.compareTo(date2) == 0) {

            System.out.println("Date1 is equal to Date2");

        } else {

            System.out.println("How to get here?");

        }
    }
	
}

OUTPUT


date1 : 2017-12-31
date2 : 2016-03-31
// Using isAfter(), isBefore(), isEqual()
Date1 is after Date2
// using compareTo()
Date1 is after Date2

Happy Learning!

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