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How to Compare Dates in Java,Using Date.compareTo() Method

 · You can get the current date in Java in various ways. Following are some of them −. The constructor of Date class. The no-arg constructor of the blogger.com class returns the Missing: online  · you can still get today’s date in Java using one line of code with the Java Calendar class, like this: // the correct way to get today's date Date today = Missing: online  · // importing local Date time import blogger.comateTime; // Java main class public class Main { // main method public static void main(String[] args) { // java date and java Missing: online Java Date Format. There are two classes for formatting dates in Java: DateFormat and SimpleDateFormat. The blogger.comrmat class provides various methods to format and So, it is a little bit tricky task to compare two dates in Java. We need not to implement any logic to compare dates. To make this task easy Java provides compareTo(), before(), after(), and ... read more

It returns true if the objects are same, else returns false. Therefore, the Date objects will be equal if and only if the getTime method returns the same long value for both dates.

Let's use the above-explained method in an example and compare two dates with the help of these methods. Like the Java Date class, the Calendar class also provides before , after , and equals methods. All three methods have the same signature, as we have explained above. Let's use the Calendar class and compare two dates with the help of after , before , and equals method.

In the following example, we have used the same method used in the previous example, except the getInstance and setTime methods. getInstance : It is a static method of the Calendar. It returns a Calendar using the default time zone and locale.

setTime : The method sets the calendar time according to the specified date. Java provides another LocalDate class to compare two LocalDate, LocalTime, and LocalDateTime. It is the member of java.

time package. The class provides isBefore , isAfter , isEquals , and compareTo method to compare dates. These methods works same as the method before , after , and equals of the Date and Calendar class. Let's use the LocalDate class in an example to compare two dates.

In the following example, we have used the following method to compare two dates. All the methods check the dates according to the local-time line. of : It is a static method of LocalDate class. It obtains an instance of LocalDate form year, month, and day. It accepts three parameters year, month, and date of type int. It returns a LocalDate with the specified date. isBefore : The method checks the date is before the specified date.

It parses a date to compare as a parameter. It returns true if and only if the date is before the specified date. Its comparison approach is different from compareTo ChronoLocalDate. isAfter : The method checks the date is before the specified date. isEqual : The method compares the dates are equal or not. If both dates are equal it returns true, false otherwise. JavaTpoint offers too many high quality services.

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Java Tutorial. JDK, JRE and JVM JVM: Java Virtual Machine Java Variables Java Data Types Unicode System Operators Keywords. Java Control Statements Java If-else Java Switch Java For Loop Java While Loop Java Do While Loop Java Break Java Continue Java Comments Java Programs. Java OOPs Concepts Naming Convention Object and Class Method Constructor static keyword this keyword. Inheritance IS-A Aggregation HAS-A.

Method Overloading Method Overriding Covariant Return Type super keyword Instance Initializer block final keyword Runtime Polymorphism Dynamic Binding instanceof operator.

Abstract class Interface Abstract vs Interface. Package Access Modifiers Encapsulation. Object class Object Cloning Math class Wrapper Class Java Recursion Call By Value strictfp keyword javadoc tool Command Line Arg Object vs Class Overloading vs Overriding. public int compareTo Date anotherDate. import java. Date; import java. SimpleDateFormat; import java. format date1 ; System. println "Date 1 comes after Date 2" ; } else if date1.

compareTo date2. Date 1: Date 2: Date 1 comes after Date 2. public boolean before Date when. Date and java. It's still useful to know how to get the current date and time using the previous two classes since not all applications have yet migrated to Java 8. LocalDate represents just a date, without time. This means that we can only get the current date, but without the time of the day:. This time around, instead of initializing a new object, we're calling the static method now which returns the current date according to the system clock, with the default time-zone.

You can also pass a ZoneId to the method to retrieve the date based on the specified time-zone, instead of the default one:. LocalTime is the opposite of LocalDate in that it represents only a time, without the date. This means that we can only get the current time of the day, without the actual date:. Check out our hands-on, practical guide to learning Git, with best-practices, industry-accepted standards, and included cheat sheet. Stop Googling Git commands and actually learn it!

Alongside the previous classes, the ZonedDateTime class also offers this functionality:. It provides access to the current Instant , LocalDate , LocalTime and LocalDateTime using a time-zone. That being said, using a Clock , you practically instantiate all of those and can access the ones you're interested in. Note: It's valid to ask why we'd use a Clock instead of just leaving the now method empty. A Clock is optional and the now method typically uses the system's clock to determine the values.

Though, through a clock you can have more than just your system's clock if you wish so. In our example, it doesn't make a difference, though. You can make a zoned Clock by passing a ZoneId to to Clock. system :. And finally, using a Clock , via the millis method, you can access the millisecond value of the clock, which is the same as System. currentTimeMillis :.

Joda-Time is a tool that was originally developed to counter the problems with the old Java time and date classes. With the release of Java 8, these problems have been tackled, and Joda-Time has served its purpose, without being used today very often.

Again, if your project isn't updated to Java 8, Joda-Time is still a great tool to use as an alternative. Let's see the simple example to convert string into date using java.

Let's see the working of the getDateTimeInstance int dateStyle, int timeStyle, Locale locale method. JavaTpoint offers too many high quality services. Mail us on [email protected] , to get more information about given services. JavaTpoint offers college campus training on Core Java, Advance Java,. Net, Android, Hadoop, PHP, Web Technology and Python. Please mail your requirement at [email protected] Duration: 1 week to 2 week.

Home Java Programs OOPs String Exception Multithreading Collections JavaFX JSP Spring Spring Boot Projects Interview Questions. Java Date Time API Java LocalDate Java LocalTime Java LocalDateTime Java MonthDay Java OffsetTime Java OffsetDateTime Java Clock Java ZonedDateTime Java ZoneId Java ZoneOffset Java Year Java YearMonth Java Period Java Duration Java Instant Java DayOfWeek enum Java Month enum.

Date java. Date Java Calendar Java TimeZone. DateFormat SimpleDateFormat. Java Conversion Java Collection Java JDBC Java New Features RMI Internationalization Interview Questions.

import java. DateFormat; import java. format currentDate ; System. getTimeInstance DateFormat. println "Date Format using getTimeInstance DateFormat. getDateTimeInstance DateFormat. println "Date Format using getDateTimeInstance DateFormat.

SHORT : PM Date Format using getTimeInstance DateFormat. MEDIUM : PM Date Format using getTimeInstance DateFormat. LONG : PM IST Date Format using getDateTimeInstance DateFormat. SHORT : 31 March, PM. parse "31 Mar, " ; System. Date; import java. Locale; import java.

Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. currentTimeMillis gives you that, expressed as the number of milliseconds after the UNIX epoch as a Java long. This value is a delta from a UTC time-point, and is independent of the local time-zone 1.

The problem is that the Date API methods are mostly flawed and deprecated. Calendar works but the APIs are still cumbersome.

new org. There are lots of other Joda alternatives too many to describe here. But note that some people report that Joda time has performance issues. in Java 8, calling java. now and java. Prior to Java 8, most people who know about these things recommended Joda-time as having by far the best Java APIs for doing things involving time point and duration calculations.

With Java 8 and later, the standard java. time package is recommended. Joda time is now considered "obsolete", and the Joda maintainers are recommending that people migrate.

currentTimeMillis gives the "system" time. While it is normal practice for the system clock to be set to nominal UTC, there will be a difference a delta between the local UTC clock and true UTC. The size of the delta depends on how well and how often the system's clock is synced with UTC.

As the javadoc says: "It cannot represent an instant on the time-line without additional information such as an offset or time-zone. As of , an official "end of life" for Joda has not been announced, and the Joda APIs have not been marked as Deprecated. If you just need to output a time stamp in format YYYY. SS very frequent case then here's the way to do it:. A few of the Answers mention that java. time classes are the modern replacement for the troublesome old legacy date-time classes bundled with the earliest versions of Java.

Below is a bit more information. The other Answers fail to explain how a time zone is crucial in determining the current date and time. For any given moment, the date and the time vary around the globe by zone. To get the current moment in UTC with a resolution in nanoseconds , use Instant class. Conventional computer hardware clocks are limited in their accuracy, so the current moment may be captured in milliseconds or microseconds rather than nanoseconds.

You can adjust that Instant into other time zones. Apply a ZoneId object to get a ZonedDateTime. Always pass that optional time zone argument. The default can change at any moment, even during runtime. Do not subject your app to an externality out of your control.

Always use an Instant or ZonedDateTime rather than a LocalDateTime when you want an actual moment on the timeline. The Local… types purposely have no concept of time zone so they represent only a rough idea of a possible moment. To get an actual moment you must assign a time zone to transform the Local… types into a ZonedDateTime and thereby make it meaningful. The LocalDate class represents a date-only value without time-of-day and without time zone.

To generate a String representing the date-time value, simply call toString on the java. time classes for the standard ISO formats. The ZonedDateTime class extends the standard format by wisely appending the name of the time zone in square brackets.

For other formats, search Stack Overflow for many Questions and Answers on the DateTimeFormatter class. Contrary to the comment on the Question by RamanSB, you should not use LocalDateTime class for the current date-time.

The LocalDateTime purposely lacks any time zone or offset-from-UTC information. So, this is not appropriate when you are tracking a specific moment on the timeline.

Certainly not appropriate for capturing the current moment. A LocalDateTime has only a date and a time-of-day such as "noon on 23rd of January ", but we have no idea if that is noon in Tokyo Japan or noon in Toledo Ohio US, two different moments many hours apart. It means any locality rather than any one specific locality. For example Christmas this year starts at midnight on the 25th of December: T , to be represented as a LocalDateTime.

But this means midnight at various points around the globe at different times. Midnight happens first in Kiribati , later in New Zealand, hours more later in India, and so on, with several more hours passing before Christmas begins in France when the kids in Canada are still awaiting that day. Each one of these Christmas-start points would be represented as a separate ZonedDateTime.

If you cannot trust your system clock, see Java: Get current Date and Time from Server not System clock and my Answer. To harness an alternate supplier of the current moment, write a subclass of the abstract java. Clock class. You can pass your Clock implementation as an argument to the various java. time methods. For example, Instant. now clock.

For testing purposes, note the alternate implementations of Clock available statically from Clock itself: fixed , offset , tick , and more.

The java. time framework is built into Java 8 and later. These classes supplant the troublesome old legacy date-time classes such as java. To learn more, see the Oracle Tutorial. And search Stack Overflow for many examples and explanations. Specification is JSR The Joda-Time project, now in maintenance mode , advises migration to the java.

time classes. You may exchange java. time objects directly with your database. Use a JDBC driver compliant with JDBC 4. No need for strings, no need for java. The ThreeTen-Extra project extends java. time with additional classes. This project is a proving ground for possible future additions to java. You may find some useful classes here such as Interval , YearWeek , YearQuarter , and more. In Java 8 it is:. This will return the number of milliseconds since January 1, , GMT for time comparison purposes.

Also try using different format patterns like "yyyy-MM-dd hh:mm:ss" and select desired pattern. Have a look at the Date class. If you just want the current date, then either create a new Date object or call Calendar. getInstance ;. As mentioned the basic Date can do what you need in terms of getting the current time. In my recent experience working heavily with Java dates there are a lot of oddities with the built in classes as well as deprecation of many of the Date class methods.

One oddity that stood out to me was that months are 0 index based which from a technical standpoint makes sense, but in real terms can be very confusing. I second Stephen C's recommendation as I have found Joda-time to be very useful in simplifying my work with dates, it is also very well documented and you can find many useful examples throughout the web. I even ended up writing a static wrapper class as DateUtils which I use to consolidate and simplify all of my common date manipulation.

The print statement will print the time when it is called and not when the SimpleDateFormat was created. So it can be called repeatedly without creating any new objects. New Data-Time API is introduced with the dawn of Java 8. This is due to following issues that were caused in the old data-time API. You can use Date object and format by yourself. It is hard to format and need more codes, as a example,. As you can see this is the worst way you can do it and according to oracle documentation it is deprecated.

Prior to JDK 1. It allowed the interpretation of dates as year, month, day, hour, minute, and second values.

How to Get Current Date and Time in Java,2021 cookbook

So, it is a little bit tricky task to compare two dates in Java. We need not to implement any logic to compare dates. To make this task easy Java provides compareTo(), before(), after(), and Java Date Format. There are two classes for formatting dates in Java: DateFormat and SimpleDateFormat. The blogger.comrmat class provides various methods to format and  · You can get the current date in Java in various ways. Following are some of them −. The constructor of Date class. The no-arg constructor of the blogger.com class returns the Missing: online Online based tool to find java milliseconds to date converter, java getTime() functions returns milliseconds to date converson 23 rows · Java SimpleDateFormat Online Tester SimpleDateFormat 'format' String: (click button to test your format) Today's Formatted Date String: 09/15/ (Server Date/Time:  · you can still get today’s date in Java using one line of code with the Java Calendar class, like this: // the correct way to get today's date Date today = Missing: online ... read more

In a programming language, sometimes we might need the current time or date. which is not the same as true UTC. Home Java Programs OOPs String Exception Multithreading Collections JavaFX JSP Spring Spring Boot Projects Interview Questions. now yourClockGoesHere ; For testing purposes, note the alternate implementations of Clock available statically from Clock itself: fixed , offset , tick , and more. CODE GAME Play Game. Therefore, the Date objects will be equal if and only if the getTime method returns the same long value for both dates.

Get tutorials, guides, and dev jobs in your inbox. So, it is a little bit tricky task to compare two dates in Java. ofPattern "yyyy" ; } public boolean java date now online long year { return Year. Amir Afghani Amir Afghani 37k 16 16 gold badges 83 83 silver badges bronze badges. At least not as the first option. Moreover, we will also discuss the difference between duration and a period and will take examples of each.

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