In this article, we will discuss different ways to compare two instances of LocalDate in Java 1.8 version
1. Comparing two LocalDate instances :
There are different methods available to compare 2 LocalDate instances, those are –
- compareTo(ChronoLocalDate) –
- This method compares invoking LocalDate with another LocalDate
- isBefore(ChronoLocalDate) –
- This method checks if invoking LocalDate is before the specified LocalDate
- isAfter(ChronoLocalDate) –
- This method checks if invoking LocalDate is after the specified LocalDate
- isEqual(ChronoLocalDate) –
- This method checks if invoking LocalDate is equal to the specified LocalDate
- equals(Object) –
- This method checks if invoking LocalDate is equal to another LocalDate
2. Examples for Comparing 2 LocalDate instances :
- Using compareTo(ChronoLocalDate) method
- Using isBefore(ChronoLocalDate) method
- Using isAfter(ChronoLocalDate) method
- Using isEqual(ChronoLocalDate) method
- Using equals(Object) method
2.1 Using compareTo(ChronoLocalDate) method :
- This method compares invoking LocalDate with another LocalDate and returns integer value based on the comparison
- Returns Zero, if both LocalDate in comparison are equal
- Returns Positive value, if invoking LocalDate is latter-than (greater-than) the specified LocalDate
- Returns Negative value, if invoking LocalDate is earlier-than (lesser-than) the specified LocalDate
Compare2LocalDateUsingCompareToMethod.java
package in.bench.resources.java8.localdate.examples;
import java.time.LocalDate;
import java.time.Month;
public class Compare2LocalDateUsingCompareToMethod {
public static void main(String[] args) {
// 1. get today's LocalDate
LocalDate todaysLocalDate = LocalDate.of(2022, Month.AUGUST, 3);
System.out.println("1. Today's LocalDate is = " + todaysLocalDate);
// 2. form past LocalDate
LocalDate pastLocalDate = LocalDate.of(2022, Month.JANUARY, 1);
System.out.println("2. Past LocalDate is = " + pastLocalDate);
// 3. form future LocalDate
LocalDate futureLocalDate = LocalDate.of(2022, Month.DECEMBER, 31);
System.out.println("3. Future LocalDate is = " + futureLocalDate);
// 4. LocalDate comparison using compareTo() method
System.out.println("\n\n4. Comparison with compareTo() method :- \n");
// 4.1 check whether todaysLocalDate Older-than futureLocalDate
int compareTo1 = todaysLocalDate.compareTo(futureLocalDate);
System.out.println("4.1 Today (" + todaysLocalDate
+ ") is Older-than Future (" + futureLocalDate + ") ?\t "
+ (compareTo1 < 0));
// 4.2 check whether todaysLocalDate Latter-than futureLocalDate
int compareTo2 = todaysLocalDate.compareTo(futureLocalDate);
System.out.println("4.2 Today (" + todaysLocalDate
+ ") is Latter-than Future (" + futureLocalDate + ") ?\t "
+ (compareTo2 > 0));
// 4.3 check whether todaysLocalDate Older-than pastLocalDate
int compareTo3 = todaysLocalDate.compareTo(pastLocalDate);
System.out.println("4.3 Today (" + todaysLocalDate
+ ") is Older than Past (" + pastLocalDate + ") ?\t "
+ (compareTo3 < 0));
// 4.4 check whether todaysLocalDate Latter-than pastLocalDate
int compareTo4 = todaysLocalDate.compareTo(pastLocalDate);
System.out.print("4.4 Today (" + todaysLocalDate
+ ") is Latter-than Past (" + pastLocalDate + ") ?\t "
+ (compareTo4 > 0));
}
}
Output:
1. Today's LocalDate is = 2022-08-03
2. Past LocalDate is = 2022-01-01
3. Future LocalDate is = 2022-12-31
4. Comparison with compareTo() method :-
4.1 Today (2022-08-03) is Older-than Future (2022-12-31) ? true
4.2 Today (2022-08-03) is Latter-than Future (2022-12-31) ? false
4.3 Today (2022-08-03) is Older than Past (2022-01-01) ? false
4.4 Today (2022-08-03) is Latter-than Past (2022-01-01) ? true
2.2 Using isBefore(ChronoLocalDate) method :
- This method checks if invoking LocalDate is before the specified LocalDate
- Returns true, if invoking LocalDate is before the specified LocalDate
- Returns false, if invoking LocalDate is not before the specified LocalDate
- Read Java 8 – How to check whether a LocalDate is Before another LocalDate ? for more details and examples
CheckLocalDateIsBeforeAnotherLocalDate.java
package in.bench.resources.java8.localdate.examples;
import java.time.LocalDate;
import java.time.Month;
public class CheckLocalDateIsBeforeAnotherLocalDate {
public static void main(String[] args) {
// 1. get today's LocalDate
LocalDate todaysLocalDate = LocalDate.of(2022, Month.AUGUST, 3);
System.out.println("1. Today's LocalDate is = " + todaysLocalDate);
// 2. form past LocalDate
LocalDate pastLocalDate = LocalDate.of(2022, Month.AUGUST, 1);
System.out.println("2. Past LocalDate is = " + pastLocalDate);
// 3. form future LocalDate
LocalDate futureLocalDate = LocalDate.of(2022, Month.AUGUST, 29);
System.out.println("3. Future LocalDate is = " + futureLocalDate);
// 4. isBefore() - LocalDate comparison
System.out.println("\n\n4. Comparing 2 LocalDate using isBefore() method :- \n");
// 4.1 check whether todaysLocalDate isBefore futureLocalDate
boolean isBefore1 = todaysLocalDate.isBefore(futureLocalDate);
System.out.println("4.1 Today's LocalDate (" + todaysLocalDate
+ ") is Before Future LocalDate (" + futureLocalDate + ") ? "
+ isBefore1);
// 4.2 check whether todaysLocalDate isBefore pastLocalDate
boolean isBefore2 = todaysLocalDate.isBefore(pastLocalDate);
System.out.println("4.2 Today's LocalDate (" + todaysLocalDate
+ ") is Before Past LocalDate (" + pastLocalDate + ") ? "
+ isBefore2);
// 4.3 check whether pastLocalDate isBefore todaysLocalDate
boolean isBefore3 = pastLocalDate.isBefore(todaysLocalDate);
System.out.println("4.3 Past LocalDate (" + pastLocalDate
+ ") is Before Today's LocalDate (" + todaysLocalDate + ") ? "
+ isBefore3);
// 4.4 check whether pastLocalDate isBefore futureLocalDate
boolean isBefore4 = pastLocalDate.isBefore(futureLocalDate);
System.out.println("4.4 Past LocalDate (" + pastLocalDate
+ ") is Before Future LocalDate (" + futureLocalDate + ") ? "
+ isBefore4);
// 4.5 check whether futureLocalDate isBefore todaysLocalDate
boolean isBefore5 = futureLocalDate.isBefore(todaysLocalDate);
System.out.println("4.5 Future LocalDate (" + futureLocalDate
+ ") is Before Today's LocalDate (" + todaysLocalDate + ") ? "
+ isBefore5);
// 4.6 check whether futureLocalDate isBefore pastLocalDate
boolean isBefore6 = futureLocalDate.isBefore(todaysLocalDate);
System.out.print("4.6 Future LocalDate (" + futureLocalDate
+ ") is Before Past LocalDate (" + pastLocalDate + ") ? "
+ isBefore6);
}
}
Output:
1. Today's LocalDate is = 2022-08-03
2. Past LocalDate is = 2022-08-01
3. Future LocalDate is = 2022-08-29
4. Comparing 2 LocalDate using isBefore() method :-
4.1 Today's LocalDate (2022-08-03) is Before Future LocalDate (2022-08-29) ? true
4.2 Today's LocalDate (2022-08-03) is Before Past LocalDate (2022-08-01) ? false
4.3 Past LocalDate (2022-08-01) is Before Today's LocalDate (2022-08-03) ? true
4.4 Past LocalDate (2022-08-01) is Before Future LocalDate (2022-08-29) ? true
4.5 Future LocalDate (2022-08-29) is Before Today's LocalDate (2022-08-03) ? false
4.6 Future LocalDate (2022-08-29) is Before Past LocalDate (2022-08-01) ? false
2.3 Using isAfter(ChronoLocalDate) method :
- This method checks if invoking LocalDate is after the specified LocalDate
- Returns true, if invoking LocalDate is after the specified LocalDate
- Returns false, if invoking LocalDate is not after the specified LocalDate
- Read Java 8 – How to check whether a LocalDate is After another LocalDate ? for more details and examples
CheckLocalDateIsAfterAnotherLocalDate.java
package in.bench.resources.java8.localdate.examples;
import java.time.LocalDate;
import java.time.Month;
public class CheckLocalDateIsAfterAnotherLocalDate {
public static void main(String[] args) {
// 1. get today's LocalDate
LocalDate todaysLocalDate = LocalDate.of(2022, Month.AUGUST, 3);
System.out.println("1. Today's LocalDate is = " + todaysLocalDate);
// 2. form past LocalDate
LocalDate pastLocalDate = LocalDate.of(2022, Month.AUGUST, 1);
System.out.println("2. Past LocalDate is = " + pastLocalDate);
// 3. form future LocalDate
LocalDate futureLocalDate = LocalDate.of(2022, Month.AUGUST, 29);
System.out.println("3. Future LocalDate is = " + futureLocalDate);
// 4. isAfter() - LocalDate comparison
System.out.println("\n\n4. Comparing 2 LocalDate using isAfter() method :- \n");
// 4.1 check whether todaysLocalDate isAfter futureLocalDate
boolean isAfter1 = todaysLocalDate.isAfter(futureLocalDate);
System.out.println("4.1 Today's LocalDate (" + todaysLocalDate
+ ") is After Future LocalDate (" + futureLocalDate + ") ? "
+ isAfter1);
// 4.2 check whether todaysLocalDate isAfter pastLocalDate
boolean isAfter2 = todaysLocalDate.isAfter(pastLocalDate);
System.out.println("4.2 Today's LocalDate (" + todaysLocalDate
+ ") is After Past LocalDate (" + pastLocalDate + ") ? "
+ isAfter2);
// 4.3 check whether pastLocalDate isAfter todaysLocalDate
boolean isAfter3 = pastLocalDate.isAfter(todaysLocalDate);
System.out.println("4.3 Past LocalDate (" + pastLocalDate
+ ") is After Today's LocalDate (" + todaysLocalDate + ") ? "
+ isAfter3);
// 4.4 check whether pastLocalDate isAfter futureLocalDate
boolean isAfter4 = pastLocalDate.isAfter(futureLocalDate);
System.out.println("4.4 Past LocalDate (" + pastLocalDate
+ ") is After Future LocalDate (" + futureLocalDate + ") ? "
+ isAfter4);
// 4.5 check whether futureLocalDate isAfter todaysLocalDate
boolean isAfter5 = futureLocalDate.isAfter(todaysLocalDate);
System.out.println("4.5 Future LocalDate (" + futureLocalDate
+ ") is After Today's LocalDate (" + todaysLocalDate + ") ? "
+ isAfter5);
// 4.6 check whether futureLocalDate isAfter pastLocalDate
boolean isAfter6 = futureLocalDate.isAfter(todaysLocalDate);
System.out.println("4.6 Future LocalDate (" + futureLocalDate
+ ") is After Past LocalDate (" + pastLocalDate + ") ? "
+ isAfter6);
}
}
Output:
1. Today's LocalDate is = 2022-08-03
2. Past LocalDate is = 2022-08-01
3. Future LocalDate is = 2022-08-29
4. Comparing 2 LocalDate using isAfter() method :-
4.1 Today's LocalDate (2022-08-03) is After Future LocalDate (2022-08-29) ? false
4.2 Today's LocalDate (2022-08-03) is After Past LocalDate (2022-08-01) ? true
4.3 Past LocalDate (2022-08-01) is After Today's LocalDate (2022-08-03) ? false
4.4 Past LocalDate (2022-08-01) is After Future LocalDate (2022-08-29) ? false
4.5 Future LocalDate (2022-08-29) is After Today's LocalDate (2022-08-03) ? true
4.6 Future LocalDate (2022-08-29) is After Past LocalDate (2022-08-01) ? true
2.4 Using isEqual(ChronoLocalDate) method :
- This method checks if invoking LocalDate is equal to the specified LocalDate
- Return true, only if both invoking LocalDate & specified LocalDate are same
- Return false, for all other cases
CheckTwoLocalDateAreEqualUsingIsEqualMethod.java
package in.bench.resources.java8.localdate.examples;
import java.time.LocalDate;
import java.time.Month;
public class CheckTwoLocalDateAreEqualUsingIsEqualMethod {
public static void main(String[] args) {
// 1. get today's LocalDate
LocalDate todaysLocalDate = LocalDate.of(2022, Month.AUGUST, 4);
System.out.println("1. Today's LocalDate is = " + todaysLocalDate);
// 2. get current LocalDate
LocalDate currentLocalDate = LocalDate.now();
System.out.println("2. Current System Date is = " + currentLocalDate);
// 3. form past LocalDate
LocalDate pastLocalDate = LocalDate.of(2022, Month.AUGUST, 1);
System.out.println("3. Past LocalDate is = " + pastLocalDate);
// 4. form future LocalDate
LocalDate futureLocalDate = LocalDate.of(2022, Month.AUGUST, 29);
System.out.println("4. Future LocalDate is = " + futureLocalDate);
// 5. LocalDate comparison using isEqual() method
System.out.println("\n\n5. Check 2 LocalDate are equal using isEqual() method :- \n");
// 5.1 check whether todaysLocalDate & currentLocalDate are same ?
boolean isEqual1 = todaysLocalDate.isEqual(currentLocalDate);
System.out.println("5.1 Today's LocalDate (" + todaysLocalDate
+ ") & Current LocalDate (" + currentLocalDate + ") are equal ?\t "
+ isEqual1);
// 5.2 check whether todaysLocalDate & pastLocalDate are same ?
boolean isEqual2 = todaysLocalDate.isEqual(pastLocalDate);
System.out.println("5.2 Today's LocalDate (" + todaysLocalDate
+ ") & Past LocalDate (" + pastLocalDate + ") are equal ?\t "
+ isEqual2);
// 5.3 check whether todaysLocalDate & futureLocalDate are same ?
boolean isEqual3 = todaysLocalDate.isEqual(futureLocalDate);
System.out.print("5.3 Today's LocalDate (" + todaysLocalDate
+ ") & Future LocalDate (" + futureLocalDate + ") are equal ?\t "
+ isEqual3);
}
}
Output:
1. Today's LocalDate is = 2022-08-04
2. Current System Date is = 2022-08-04
3. Past LocalDate is = 2022-08-01
4. Future LocalDate is = 2022-08-29
5. Check 2 LocalDate are equal using isEqual() method :-
5.1 Today's LocalDate (2022-08-04) & Current LocalDate (2022-08-04) are equal ? true
5.2 Today's LocalDate (2022-08-04) & Past LocalDate (2022-08-01) are equal ? false
5.3 Today's LocalDate (2022-08-04) & Future LocalDate (2022-08-29) are equal ? false
2.5 Using equals(Object) method :
- This method checks if invoking LocalDate is equal to the another LocalDate
- Return true, only if both invoking LocalDate & specified LocalDate are same
- Return false, for all other cases
CheckTwoLocalDateAreEqualUsingEqualsMethod.java
package in.bench.resources.java8.localdate.examples;
import java.time.LocalDate;
import java.time.Month;
public class CheckTwoLocalDateAreEqualUsingEqualsMethod {
public static void main(String[] args) {
// 1. get today's LocalDate
LocalDate todaysLocalDate = LocalDate.of(2022, Month.AUGUST, 4);
System.out.println("1. Today's LocalDate is = " + todaysLocalDate);
// 2. get current LocalDate
LocalDate currentLocalDate = LocalDate.now();
System.out.println("2. Current System Date is = " + currentLocalDate);
// 3. form past LocalDate
LocalDate pastLocalDate = LocalDate.of(2022, Month.AUGUST, 1);
System.out.println("3. Past LocalDate is = " + pastLocalDate);
// 4. form future LocalDate
LocalDate futureLocalDate = LocalDate.of(2022, Month.AUGUST, 29);
System.out.println("4. Future LocalDate is = " + futureLocalDate);
// 5. LocalDate comparison using isEqual() method
System.out.println("\n\n5. Check 2 LocalDate are equal using equals() method :- \n");
// 5.1 check whether todaysLocalDate & currentLocalDate are same ?
boolean equals1 = todaysLocalDate.equals(currentLocalDate);
System.out.println("5.1 Today's LocalDate (" + todaysLocalDate
+ ") & Current LocalDate (" + currentLocalDate + ") are equal ?\t "
+ equals1);
// 5.2 check whether todaysLocalDate & pastLocalDate are same ?
boolean equals2 = todaysLocalDate.equals(pastLocalDate);
System.out.println("5.2 Today's LocalDate (" + todaysLocalDate
+ ") & Past LocalDate (" + pastLocalDate + ") are equal ?\t "
+ equals2);
// 5.3 check whether todaysLocalDate & futureLocalDate are same ?
boolean equals3 = todaysLocalDate.equals(futureLocalDate);
System.out.print("5.3 Today's LocalDate (" + todaysLocalDate
+ ") & Future LocalDate (" + futureLocalDate + ") are equal ?\t "
+ equals3);
}
}
Output:
1. Today's LocalDate is = 2022-08-04
2. Current System Date is = 2022-08-04
3. Past LocalDate is = 2022-08-01
4. Future LocalDate is = 2022-08-29
5. Check 2 LocalDate are equal using equals() method :-
5.1 Today's LocalDate (2022-08-04) & Current LocalDate (2022-08-04) are equal ? true
5.2 Today's LocalDate (2022-08-04) & Past LocalDate (2022-08-01) are equal ? false
5.3 Today's LocalDate (2022-08-04) & Future LocalDate (2022-08-29) are equal ? false
Related Articles:
- Java 8 – LocalDate with method details and examples
- Java 8 – How to get Year, Month and Day fields from LocalDate ?
- Java 8 – How to get Number of Days in a Month from LocalDate ?
- Java 8 – How to get Number of Days in a Year from LocalDate ?
- Java 8 – How to form LocalDate passing Year, Month and Day fields ?
- Java 8 – How to parse LocalDate in String form ?
- Java 8 – How to convert String to LocalDate ?
- Java 8 – How to convert LocalDate to String ?
- Java 8 – How to convert LocalDate in different formats ?
- Java 8 – How to convert LocalDate in different Format Style ?
- Java 8 – How to convert LocalDate to LocalDateTime ?
- Java 8 – How to convert LocalDate to ZonedDateTime ?
- Java 8 – How to convert LocalDate to an OffsetDateTime ?
- Java 8 – How to convert LocalDate to an Instant ?
- Java 8 – How to convert LocalDate to java.sql.Timestamp and vice-versa ?
- Java 8 – How to convert LocalDate to java.util.Date and vice-versa ?
- Java 8 – How to convert LocalDate to java.util.Calendar and vice-versa ?
- Java 8 – How to convert LocalDate to java.util.GregorianCalendar and vice-versa ?
- Java 8 – How to convert LocalDate to javax.xml.datatype.XMLGregorianCalendar and vice-versa ?
- Java 8 – How to convert java.util.Date to LocalDate in different ways ?
- Java 8 – How to add Year, Month and Day fields to LocalDate ?
- Java 8 – How to subtract Year, Month and Day fields from LocalDate ?
- Java 8 – How to alter Year, Month and Day fields of LocalDate ?
- Java 8 – How to check whether a LocalDate is Before another LocalDate ?
- Java 8 – How to check whether a LocalDate is After another LocalDate ?
- Java 8 – How to compare two LocalDate instances ?
- Java 8 – How to get remaining number of Days in a Year using LocalDate ?
- Java 8 – How to find difference between two LocalDate instances using Period ?
- More Java 8 Date/Time API examples
References:
- https://docs.oracle.com/javase/8/docs/api/java/time/LocalDate.html
- https://docs.oracle.com/javase/8/docs/api/java/time/chrono/ChronoLocalDate.html
Happy Coding !!
Happy Learning !!
