Question

How to check if date1 is before date2 in Java

Answer 1

import java.util.Date;
 
public class CompareDates {

    public static void main(String[] args) {
       
        Date date1 = new Date(); // current date
        Date date2 = new Date(System.currentTimeMillis() + 1000000); // future date

        if (date1.before(date2)) {
            System.out.println("date1 is before date2");
        } else {
            System.out.println("date1 is not before date2");
        }
    }
}


/*
run:

date1 is before date2

*/

 

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Answer 2

import java.time.LocalDate;
 
public class CompareDates {

    public static void main(String[] args) {

        LocalDate date1 = LocalDate.of(2025, 6, 1); // June 1, 2025
        LocalDate date2 = LocalDate.of(2025, 6, 14); // June 14, 2025

        if (date1.isBefore(date2)) {
            System.out.println("date1 is before date2");
        } else {
            System.out.println("date1 is not before date2");
        }
    }
}


/*
run:

date1 is before date2

*/

 

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Answer 3

import java.time.LocalDateTime;
 
public class CompareDates {

    public static void main(String[] args) {

        LocalDateTime date1 = LocalDateTime.of(2025, 6, 1, 10, 0); // June 1, 2025, 10:00 AM
        LocalDateTime date2 = LocalDateTime.of(2025, 6, 15, 10, 0); // June 15, 2025, 10:00 AM

        if (date1.isBefore(date2)) {
            System.out.println("date1 is before date2");
        } else {
            System.out.println("date1 is not before date2");
        }
    }
}


/*
run:

date1 is before date2

*/

 

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