Operation returns false (and the size of the sorted set does not increase)īecause a and b are equivalent from the sorted set's Set that does not use an explicit comparator, the second add

(!a.equals(b) & a.compareTo(b) = 0) to a sorted Particular, such a sorted set (or sorted map) violates the general contractįor set (or map), which is defined in terms of the equalsįor example, if one adds two keys a and b such that Without explicit comparators behave 'strangely' when they are used withĮlements (or keys) whose natural ordering is inconsistent with equals. This is so because sorted sets (and sorted maps) It is strongly recommended (though not required) that natural orderings beĬonsistent with equals. Throw a NullPointerException even though e.equals(null) Is not an instance of any class, and e.compareTo(null) should

The same boolean value as e1.equals(e2) for every With equals if and only if e1.compareTo(e2) = 0 has The natural ordering for a class C is said to be consistent Interface can be used as keys in a sorted map or asĮlements in a sorted set, without the need to Lists (and arrays) of objects that implement this interface can be sortedĪrrays.sort). Ordering, and the class's compareTo method is referred to as

This ordering is referred to as the class's natural This interface imposes a total ordering on the objects of each class that Type Parameters: T - the type of objects that this object may be compared to All Known Subinterfaces: ChronoLocalDate, ChronoLocalDateTime, Chronology, ChronoZonedDateTime, Delayed, Name, Path, RunnableScheduledFuture, ScheduledFuture All Known Implementing Classes: AbstractChronology,, AccessMode, AclEntryFlag, AclEntryPermission, AclEntryType, AddressingFeature.Responses, Authenticator.RequestorType, BigDecimal, BigInteger, Boolean, Byte, ByteBuffer, Calendar, CertPathValidatorException.BasicReason, Character, Character.UnicodeScript, CharBuffer, Charset, ChronoField, ChronoUnit, ClientInfoStatus, CollationKey, Collector.Characteristics, Component.BaselineResizeBehavior, CompositeName, CompoundName, CRLReason, CryptoPrimitive, Date, Date, DayOfWeek, Desktop.Action, Diagnostic.Kind, Dialog.ModalExclusionType, Dialog.ModalityType, DocumentationTool.Location, Double, DoubleBuffer, DropMode, Duration, ElementKind, ElementType, Enum, File, FileTime, FileVisitOption, FileVisitResult, Float, FloatBuffer, FormatStyle, Formatter.BigDecimalLayoutForm, FormSubmitEvent.MethodType, GraphicsDevice.WindowTranslucency, GregorianCalendar, GroupLayout.Alignment, HijrahChronology, HijrahDate, HijrahEra, Instant, IntBuffer, Integer, IsoChronology, IsoEra, JapaneseChronology, JapaneseDate, JavaFileObject.Kind, JDBCType, JTable.PrintMode, KeyRep.Type, LayoutStyle.ComponentPlacement, LdapName, LinkOption, LocalDate, LocalDateTime, Locale.Category, Locale.FilteringMode, LocalTime, Long, LongBuffer, MappedByteBuffer, MemoryType, MessageContext.Scope, MinguoChronology, MinguoDate, MinguoEra, Modifier, Month, MonthDay, MultipleGradientPaint.ColorSpaceType, MultipleGradientPaint.CycleMethod, NestingKind, Normalizer.Form, NumericShaper.Range, ObjectName, ObjectStreamField, OffsetDateTime, OffsetTime, PKIXReason, PKIXRevocationChecker.Option, PosixFilePermission,, Proxy.Type, PseudoColumnUsage, Rdn, ResolverStyle, Resource.AuthenticationType, RetentionPolicy, RoundingMode, RowFilter.ComparisonType, RowIdLifetime, RowSorterEvent.Type, Service.Mode, Short, ShortBuffer, SignStyle, SOAPBinding.ParameterStyle, SOAPBinding.Style, SOAPBinding.Use, SortOrder, SourceVersion, SSLEngineResult.HandshakeStatus, SSLEngineResult.Status, StandardCopyOption, StandardLocation, StandardOpenOption, StandardProtocolFamily, String, SwingWorker.StateValue, TextStyle, ThaiBuddhistChronology, ThaiBuddhistDate, ThaiBuddhistEra, Thread.State, Time, Timestamp, TimeUnit, TrayIcon.MessageType, TypeKind, URI, UUID, WebParam.Mode, Window.Type, XmlAccessOrder, XmlAccessType, XmlNsForm, Year, YearMonth, ZonedDateTime, ZoneOffset, ZoneOffsetTransition, ZoneOffsetTransitionRule.TimeDefinition.

Java api jgrasp