Comparing Dates and Times
It is also possible to check whether a temporal object represents a point in time before or after another temporal object of the same type. In addition, the LocalDate and LocalDateTime classes provide an isEqual() method that determines whether a temporal object is equal to another temporal object of the same type. In contrast, the equals() method allows equality comparison with an arbitrary object.
LocalDate d1 = LocalDate.of(1948, 2, 28); // 1948-02-28
LocalDate d2 = LocalDate.of(1949, 3, 1); // 1949-03-01
boolean result1 = d1.isBefore(d2); // true
boolean result2 = d2.isAfter(d1); // true
boolean result3 = d1.isAfter(d1); // false
boolean result4 = d1.isEqual(d2); // false
boolean result5 = d1.isEqual(d1); // true
boolean result6 = d1.isLeapYear(); // true
The temporal classes implement the Comparable<E> interface, providing the compareTo() method so that temporal objects can be compared in a meaningful way. The temporal classes also override the equals() and the hashCode() methods of the Object class. These methods make it possible to both search for and sort temporal objects.
// LocalTime
boolean isBefore(LocalTime other)
boolean isAfter(LocalTime other)
Determine whether this LocalTime represents a point on the timeline before or after the other time, respectively.
// LocalDate
boolean isBefore(ChronoLocalDate other)
boolean isAfter(ChronoLocalDate other)
boolean isEqual(ChronoLocalDate other)
boolean isLeapYear()
The first two methods determine whether this LocalDate represents a point on the timeline before or after the other date, respectively. The LocalDate class implements the ChronoLocalDate interface.
The third method determines whether this date is equal to the specified date.
The last method checks for a leap year according to the ISO proleptic calendar system rules.
// LocalDateTime
boolean isBefore(ChronoLocalDateTime<?> other)
boolean isAfter(ChronoLocalDateTime<?> other)
boolean isEqual(ChronoLocalDateTime<?> other)
The first two methods determine whether this LocalDateTime represents a point on the timeline before or after the specified date-time, respectively. The Local-DateTime class implements the ChronoLocalDateTime<LocalDateTime> interface.
The third method determines whether this date-time object represents the same point on the timeline as the other date-time.
int compareTo(LocalTime other) // LocalTime
int compareTo(ChronoLocalDate other) // LocalDate
int compareTo(ChronoLocalDateTime<?> other) // LocalDateTime
Compare this temporal object to another temporal object. The three temporal classes implement the Comparable<E> functional interface. The compareTo() method returns 0 if the two temporal objects are equal, a negative value if this temporal object is less than the other temporal object, and a positive value if this temporal object is greater than the other temporal object.