## Uses of Class
java.lang.Integer

- Packages that use Integer
  Package | Description
  --- | ---
  com.sun.nio.sctp | A Java API for Stream Control Transport Protocol.
  java.awt.font | Provides classes and interface relating to fonts.
  java.lang | Provides classes that are fundamental to the design of the Java programming language.
  java.net | Provides the classes for implementing networking applications.
  java.nio.channels | Defines channels, which represent connections to entities that are capable of performing I/O operations, such as files and sockets; defines selectors, for multiplexed, non-blocking I/O operations.
  java.sql | Provides the API for accessing and processing data stored in a data source (usually a relational database) using the Java™ programming language.
  java.util | Contains the collections framework, some internationalization support classes, a service loader, properties, random number generation, string parsing and scanning classes, base64 encoding and decoding, a bit array, and several miscellaneous utility classes.
  java.util.spi | Service provider classes for the classes in the java.util package.
  java.util.stream | Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.
  javax.imageio.plugins.tiff | Public classes used by the built-in TIFF plug-ins.
  javax.management | Provides the core classes for the Java Management Extensions.
  javax.management.openmbean | Provides the open data types and Open MBean descriptor classes.
  javax.management.relation | Provides the definition of the Relation Service.
  javax.management.remote | Interfaces for remote access to JMX MBean servers.
  javax.management.remote.rmi | The RMI connector is a connector for the JMX Remote API that uses RMI to transmit client requests to a remote MBean server.
  javax.management.timer | Provides the definition of the Timer MBean.
  javax.script | The scripting API consists of interfaces and classes that define Java™ Scripting Engines and provides a framework for their use in Java applications.
  javax.swing | Provides a set of "lightweight" (all-Java language) components that, to the maximum degree possible, work the same on all platforms.
  javax.swing.plaf.basic | Provides user interface objects built according to the Basic look and feel.
  jdk.jshell | Provides interfaces for creating tools, such as a Read-Eval-Print Loop (REPL), which interactively evaluate "snippets" of Java programming language code.
  jdk.net | Platform specific socket options for the `java.net` and `java.nio.channels` socket classes.

- - ### Uses of Integer in com.sun.nio.sctp

    Fields in com.sun.nio.sctp with type parameters of type Integer
    Modifier and Type | Field | Description
    --- | --- | ---
    `static SctpSocketOption<Integer>` | SctpStandardSocketOptions.`SCTP_FRAGMENT_INTERLEAVE` | Fragmented interleave controls how the presentation of messages occur for the message receiver.
    `static SctpSocketOption<Integer>` | SctpStandardSocketOptions.`SO_LINGER` | Linger on close if data is present.
    `static SctpSocketOption<Integer>` | SctpStandardSocketOptions.`SO_RCVBUF` | The size of the socket receive buffer.
    `static SctpSocketOption<Integer>` | SctpStandardSocketOptions.`SO_SNDBUF` | The size of the socket send buffer.

  - ### Uses of Integer in java.awt.font

    Fields in java.awt.font declared as Integer
    Modifier and Type | Field | Description
    --- | --- | ---
    `static Integer` | TextAttribute.`KERNING_ON` | Request standard kerning.
    `static Integer` | TextAttribute.`LIGATURES_ON` | Request standard optional ligatures.
    `static Integer` | TextAttribute.`SUPERSCRIPT_SUB` | Standard subscript.
    `static Integer` | TextAttribute.`SUPERSCRIPT_SUPER` | Standard superscript.
    `static Integer` | TextAttribute.`UNDERLINE_LOW_DASHED` | Single pixel dashed low underline.
    `static Integer` | TextAttribute.`UNDERLINE_LOW_DOTTED` | Single pixel dotted low underline.
    `static Integer` | TextAttribute.`UNDERLINE_LOW_GRAY` | Double pixel gray low underline.
    `static Integer` | TextAttribute.`UNDERLINE_LOW_ONE_PIXEL` | Single pixel solid low underline.
    `static Integer` | TextAttribute.`UNDERLINE_LOW_TWO_PIXEL` | Double pixel solid low underline.
    `static Integer` | TextAttribute.`UNDERLINE_ON` | Standard underline.

  - ### Uses of Integer in java.lang

    Fields in java.lang with type parameters of type Integer
    Modifier and Type | Field | Description
    --- | --- | ---
    `static Class<Integer>` | Integer.`TYPE` | The `Class` instance representing the primitive type `int`.

    Methods in java.lang that return Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `static Integer` | Integer.`decode​(String nm)` | Decodes a `String` into an `Integer`.
    `static Integer` | Integer.`getInteger​(String nm)` | Determines the integer value of the system property with the specified name.
    `static Integer` | Integer.`getInteger​(String nm, int val)` | Determines the integer value of the system property with the specified name.
    `static Integer` | Integer.`getInteger​(String nm, Integer val)` | Returns the integer value of the system property with the specified name.
    `Integer` | Integer.`resolveConstantDesc​(MethodHandles.Lookup lookup)` | Resolves this instance as a `ConstantDesc`, the result of which is the instance itself.
    `static Integer` | Integer.`valueOf​(int i)` | Returns an `Integer` instance representing the specified `int` value.
    `static Integer` | Integer.`valueOf​(String s)` | Returns an `Integer` object holding the value of the specified `String`.
    `static Integer` | Integer.`valueOf​(String s, int radix)` | Returns an `Integer` object holding the value extracted from the specified `String` when parsed with the radix given by the second argument.

    Methods in java.lang that return types with arguments of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `Optional<Integer>` | Runtime.Version.`build()` | Returns the build number.
    `Optional<Integer>` | Integer.`describeConstable()` | Returns an `Optional` containing the nominal descriptor for this instance, which is the instance itself.
    `List<Integer>` | Runtime.Version.`version()` | Returns an unmodifiable `List` of the integers represented in the version number.

    Methods in java.lang with parameters of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `int` | Integer.`compareTo​(Integer anotherInteger)` | Compares two `Integer` objects numerically.
    `static Integer` | Integer.`getInteger​(String nm, Integer val)` | Returns the integer value of the system property with the specified name.

  - ### Uses of Integer in java.net

    Fields in java.net with type parameters of type Integer
    Modifier and Type | Field | Description
    --- | --- | ---
    `static SocketOption<Integer>` | StandardSocketOptions.`IP_MULTICAST_TTL` | The time-to-live for Internet Protocol (IP) multicast datagrams.
    `static SocketOption<Integer>` | StandardSocketOptions.`IP_TOS` | The Type of Service (ToS) octet in the Internet Protocol (IP) header.
    `static SocketOption<Integer>` | StandardSocketOptions.`SO_LINGER` | Linger on close if data is present.
    `static SocketOption<Integer>` | StandardSocketOptions.`SO_RCVBUF` | The size of the socket receive buffer.
    `static SocketOption<Integer>` | StandardSocketOptions.`SO_SNDBUF` | The size of the socket send buffer.

  - ### Uses of Integer in java.nio.channels

    Methods in java.nio.channels that return types with arguments of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `Future<Integer>` | AsynchronousByteChannel.`read​(ByteBuffer dst)` | Reads a sequence of bytes from this channel into the given buffer.
    `abstract Future<Integer>` | AsynchronousFileChannel.`read​(ByteBuffer dst, long position)` | Reads a sequence of bytes from this channel into the given buffer, starting at the given file position.
    `abstract Future<Integer>` | AsynchronousSocketChannel.`read​(ByteBuffer dst)` |
    `Future<Integer>` | AsynchronousByteChannel.`write​(ByteBuffer src)` | Writes a sequence of bytes to this channel from the given buffer.
    `abstract Future<Integer>` | AsynchronousFileChannel.`write​(ByteBuffer src, long position)` | Writes a sequence of bytes to this channel from the given buffer, starting at the given file position.
    `abstract Future<Integer>` | AsynchronousSocketChannel.`write​(ByteBuffer src)` |

    Method parameters in java.nio.channels with type arguments of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `<A> void` | AsynchronousByteChannel.`read​(ByteBuffer dst, A attachment, CompletionHandler<Integer,​? super A> handler)` | Reads a sequence of bytes from this channel into the given buffer.
    `abstract <A> void` | AsynchronousFileChannel.`read​(ByteBuffer dst, long position, A attachment, CompletionHandler<Integer,​? super A> handler)` | Reads a sequence of bytes from this channel into the given buffer, starting at the given file position.
    `abstract <A> void` | AsynchronousSocketChannel.`read​(ByteBuffer dst, long timeout, TimeUnit unit, A attachment, CompletionHandler<Integer,​? super A> handler)` | Reads a sequence of bytes from this channel into the given buffer.
    `<A> void` | AsynchronousSocketChannel.`read​(ByteBuffer dst, A attachment, CompletionHandler<Integer,​? super A> handler)` |
    `<A> void` | AsynchronousByteChannel.`write​(ByteBuffer src, A attachment, CompletionHandler<Integer,​? super A> handler)` | Writes a sequence of bytes to this channel from the given buffer.
    `abstract <A> void` | AsynchronousFileChannel.`write​(ByteBuffer src, long position, A attachment, CompletionHandler<Integer,​? super A> handler)` | Writes a sequence of bytes to this channel from the given buffer, starting at the given file position.
    `abstract <A> void` | AsynchronousSocketChannel.`write​(ByteBuffer src, long timeout, TimeUnit unit, A attachment, CompletionHandler<Integer,​? super A> handler)` | Writes a sequence of bytes to this channel from the given buffer.
    `<A> void` | AsynchronousSocketChannel.`write​(ByteBuffer src, A attachment, CompletionHandler<Integer,​? super A> handler)` |

  - ### Uses of Integer in java.sql

    Methods in java.sql that return Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `Integer` | JDBCType.`getVendorTypeNumber()` | Returns the vendor specific type number for the data type.
    `Integer` | SQLType.`getVendorTypeNumber()` | Returns the vendor specific type number for the data type.

  - ### Uses of Integer in java.util

    Methods in java.util that return Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `default Integer` | PrimitiveIterator.OfInt.`next()` | Returns the next element in the iteration.

    Methods in java.util that return types with arguments of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `Map<String,​Integer>` | Calendar.`getDisplayNames​(int field, int style, Locale locale)` | Returns a `Map` containing all names of the calendar `field` in the given `style` and `locale` and their corresponding field values.

    Method parameters in java.util with type arguments of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `default void` | PrimitiveIterator.OfInt.`forEachRemaining​(Consumer<? super Integer> action)` | Performs the given action for each remaining element until all elements have been processed or the action throws an exception.
    `default void` | Spliterator.OfInt.`forEachRemaining​(Consumer<? super Integer> action)` | Performs the given action for each remaining element, sequentially in the current thread, until all elements have been processed or the action throws an exception.
    `default boolean` | Spliterator.OfInt.`tryAdvance​(Consumer<? super Integer> action)` | If a remaining element exists, performs the given action on it, returning `true`; else returns `false`.

  - ### Uses of Integer in java.util.spi

    Methods in java.util.spi that return types with arguments of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `abstract Map<String,​Integer>` | CalendarNameProvider.`getDisplayNames​(String calendarType, int field, int style, Locale locale)` | Returns a `Map` containing all string representations (display names) of the `Calendar` `field` in the given `style` and `locale` and their corresponding field values.

  - ### Uses of Integer in java.util.stream

    Methods in java.util.stream that return types with arguments of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `Stream<Integer>` | IntStream.`boxed()` | Returns a `Stream` consisting of the elements of this stream, each boxed to an `Integer`.
    `static <T> Collector<T,​?,​Integer>` | Collectors.`summingInt​(ToIntFunction<? super T> mapper)` | Returns a `Collector` that produces the sum of a integer-valued function applied to the input elements.

  - ### Uses of Integer in javax.imageio.plugins.tiff

    Methods in javax.imageio.plugins.tiff that return types with arguments of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `SortedSet<Integer>` | TIFFTagSet.`getTagNumbers()` | Retrieves an unmodifiable numerically increasing set of tag numbers.

  - ### Uses of Integer in javax.management

    Methods in javax.management that return Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `Integer` | MBeanServer.`getMBeanCount()` | Returns the number of MBeans registered in the MBean server.
    `Integer` | MBeanServerConnection.`getMBeanCount()` | Returns the number of MBeans registered in the MBean server.

  - ### Uses of Integer in javax.management.openmbean

    Fields in javax.management.openmbean with type parameters of type Integer
    Modifier and Type | Field | Description
    --- | --- | ---
    `static SimpleType<Integer>` | SimpleType.`INTEGER` | The `SimpleType` instance describing values whose Java class name is `java.lang.Integer`.

  - ### Uses of Integer in javax.management.relation

    Methods in javax.management.relation that return Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `Integer` | RelationService.`checkRoleReading​(String roleName, String relationTypeName)` | Checks if given Role can be read in a relation of the given type.
    `Integer` | RelationServiceMBean.`checkRoleReading​(String roleName, String relationTypeName)` | Checks if given Role can be read in a relation of the given type.
    `Integer` | RelationService.`checkRoleWriting​(Role role, String relationTypeName, Boolean initFlag)` | Checks if given Role can be set in a relation of given type.
    `Integer` | RelationServiceMBean.`checkRoleWriting​(Role role, String relationTypeName, Boolean initFlag)` | Checks if given Role can be set in a relation of given type.
    `Integer` | Relation.`getRoleCardinality​(String roleName)` | Returns the number of MBeans currently referenced in the given role.
    `Integer` | RelationService.`getRoleCardinality​(String relationId, String roleName)` | Retrieves the number of MBeans currently referenced in the given role.
    `Integer` | RelationServiceMBean.`getRoleCardinality​(String relationId, String roleName)` | Retrieves the number of MBeans currently referenced in the given role.
    `Integer` | RelationSupport.`getRoleCardinality​(String roleName)` | Returns the number of MBeans currently referenced in the given role.

  - ### Uses of Integer in javax.management.remote

    Methods in javax.management.remote that return Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `Integer` | TargetedNotification.`getListenerID()` | The ID of the listener to which the notification is targeted.

    Constructors in javax.management.remote with parameters of type Integer
    Constructor | Description
    --- | ---
    `TargetedNotification​(Notification notification, Integer listenerID)` | Constructs a `TargetedNotification` object.

  - ### Uses of Integer in javax.management.remote.rmi

    Methods in javax.management.remote.rmi that return Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `Integer[]` | RMIConnection.`addNotificationListeners​(ObjectName[] names, MarshalledObject[] filters, Subject[] delegationSubjects)` | Handles the method `MBeanServerConnection.addNotificationListener(ObjectName, NotificationListener, NotificationFilter, Object)`.
    `Integer` | RMIConnection.`getMBeanCount​(Subject delegationSubject)` | Handles the method `MBeanServerConnection.getMBeanCount()`.

    Methods in javax.management.remote.rmi with parameters of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | RMIConnection.`removeNotificationListeners​(ObjectName name, Integer[] listenerIDs, Subject delegationSubject)` | Handles the `removeNotificationListener(ObjectName, NotificationListener)` and `removeNotificationListener(ObjectName, NotificationListener, NotificationFilter, Object)` methods.

  - ### Uses of Integer in javax.management.timer

    Methods in javax.management.timer that return Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `Integer` | Timer.`addNotification​(String type, String message, Object userData, Date date)` | Creates a new timer notification with the specified `type`, `message` and `userData` and inserts it into the list of notifications with a given date and a null period and number of occurrences.
    `Integer` | Timer.`addNotification​(String type, String message, Object userData, Date date, long period)` | Creates a new timer notification with the specified `type`, `message` and `userData` and inserts it into the list of notifications with a given date and period and a null number of occurrences.
    `Integer` | Timer.`addNotification​(String type, String message, Object userData, Date date, long period, long nbOccurences)` | Creates a new timer notification with the specified `type`, `message` and `userData` and inserts it into the list of notifications with a given date, period and number of occurrences.
    `Integer` | Timer.`addNotification​(String type, String message, Object userData, Date date, long period, long nbOccurences, boolean fixedRate)` | Creates a new timer notification with the specified `type`, `message` and `userData` and inserts it into the list of notifications with a given date, period and number of occurrences.
    `Integer` | TimerMBean.`addNotification​(String type, String message, Object userData, Date date)` | Creates a new timer notification with the specified `type`, `message` and `userData` and inserts it into the list of notifications with a given date and a null period and number of occurrences.
    `Integer` | TimerMBean.`addNotification​(String type, String message, Object userData, Date date, long period)` | Creates a new timer notification with the specified `type`, `message` and `userData` and inserts it into the list of notifications with a given date and period and a null number of occurrences.
    `Integer` | TimerMBean.`addNotification​(String type, String message, Object userData, Date date, long period, long nbOccurences)` | Creates a new timer notification with the specified `type`, `message` and `userData` and inserts it into the list of notifications with a given date, period and number of occurrences.
    `Integer` | TimerMBean.`addNotification​(String type, String message, Object userData, Date date, long period, long nbOccurences, boolean fixedRate)` | Creates a new timer notification with the specified `type`, `message` and `userData` and inserts it into the list of notifications with a given date, period and number of occurrences.
    `Integer` | TimerNotification.`getNotificationID()` | Gets the identifier of this timer notification.

    Methods in javax.management.timer that return types with arguments of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `Vector<Integer>` | Timer.`getAllNotificationIDs()` | Gets all timer notification identifiers registered into the list of notifications.
    `Vector<Integer>` | TimerMBean.`getAllNotificationIDs()` | Gets all timer notification identifiers registered into the list of notifications.
    `Vector<Integer>` | Timer.`getNotificationIDs​(String type)` | Gets all the identifiers of timer notifications corresponding to the specified type.
    `Vector<Integer>` | TimerMBean.`getNotificationIDs​(String type)` | Gets all the identifiers of timer notifications corresponding to the specified type.

    Methods in javax.management.timer with parameters of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `Date` | Timer.`getDate​(Integer id)` | Gets a copy of the date associated to a timer notification.
    `Date` | TimerMBean.`getDate​(Integer id)` | Gets a copy of the date associated to a timer notification.
    `Boolean` | Timer.`getFixedRate​(Integer id)` | Gets a copy of the flag indicating whether a periodic notification is executed at fixed-delay or at fixed-rate.
    `Boolean` | TimerMBean.`getFixedRate​(Integer id)` | Gets a copy of the flag indicating whether a periodic notification is executed at fixed-delay or at fixed-rate.
    `Long` | Timer.`getNbOccurences​(Integer id)` | Gets a copy of the remaining number of occurrences associated to a timer notification.
    `Long` | TimerMBean.`getNbOccurences​(Integer id)` | Gets a copy of the remaining number of occurrences associated to a timer notification.
    `String` | Timer.`getNotificationMessage​(Integer id)` | Gets the timer notification detailed message corresponding to the specified identifier.
    `String` | TimerMBean.`getNotificationMessage​(Integer id)` | Gets the timer notification detailed message corresponding to the specified identifier.
    `String` | Timer.`getNotificationType​(Integer id)` | Gets the timer notification type corresponding to the specified identifier.
    `String` | TimerMBean.`getNotificationType​(Integer id)` | Gets the timer notification type corresponding to the specified identifier.
    `Object` | Timer.`getNotificationUserData​(Integer id)` | Gets the timer notification user data object corresponding to the specified identifier.
    `Object` | TimerMBean.`getNotificationUserData​(Integer id)` | Gets the timer notification user data object corresponding to the specified identifier.
    `Long` | Timer.`getPeriod​(Integer id)` | Gets a copy of the period (in milliseconds) associated to a timer notification.
    `Long` | TimerMBean.`getPeriod​(Integer id)` | Gets a copy of the period (in milliseconds) associated to a timer notification.
    `void` | Timer.`removeNotification​(Integer id)` | Removes the timer notification corresponding to the specified identifier from the list of notifications.
    `void` | TimerMBean.`removeNotification​(Integer id)` | Removes the timer notification corresponding to the specified identifier from the list of notifications.

    Constructors in javax.management.timer with parameters of type Integer
    Constructor | Description
    --- | ---
    `TimerNotification​(String type, Object source, long sequenceNumber, long timeStamp, String msg, Integer id)` | Creates a timer notification object.

  - ### Uses of Integer in javax.script

    Methods in javax.script that return types with arguments of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `List<Integer>` | ScriptContext.`getScopes()` | Returns immutable `List` of all the valid values for scope in the ScriptContext.

  - ### Uses of Integer in javax.swing

    Fields in javax.swing declared as Integer
    Modifier and Type | Field | Description
    --- | --- | ---
    `static Integer` | JLayeredPane.`DEFAULT_LAYER` | Convenience object defining the Default layer.
    `static Integer` | JLayeredPane.`DRAG_LAYER` | Convenience object defining the Drag layer.
    `static Integer` | JLayeredPane.`FRAME_CONTENT_LAYER` | Convenience object defining the Frame Content layer.
    `static Integer` | JLayeredPane.`MODAL_LAYER` | Convenience object defining the Modal layer.
    `static Integer` | JLayeredPane.`PALETTE_LAYER` | Convenience object defining the Palette layer.
    `static Integer` | JLayeredPane.`POPUP_LAYER` | Convenience object defining the Popup layer.

    Methods in javax.swing that return Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `protected Integer` | JLayeredPane.`getObjectForLayer​(int layer)` | Returns the Integer object associated with a specified layer.

    Methods in javax.swing that return types with arguments of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `Hashtable<Integer,​JComponent>` | JSlider.`createStandardLabels​(int increment)` | Creates a `Hashtable` of numerical text labels, starting at the slider minimum, and using the increment specified.
    `Hashtable<Integer,​JComponent>` | JSlider.`createStandardLabels​(int increment, int start)` | Creates a `Hashtable` of numerical text labels, starting at the starting point specified, and using the increment specified.
    `protected Hashtable<Component,​Integer>` | JLayeredPane.`getComponentToLayer()` | Returns the hashtable that maps components to layers.

    Methods in javax.swing with parameters of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | JInternalFrame.`setLayer​(Integer layer)` | Convenience method for setting the layer attribute of this component.

  - ### Uses of Integer in javax.swing.plaf.basic

    Methods in javax.swing.plaf.basic that return Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `protected Integer` | BasicSliderUI.`getHighestValue()` | Returns the biggest value that has an entry in the label table.
    `protected Integer` | BasicSliderUI.`getLowestValue()` | Returns the smallest value that has an entry in the label table.

  - ### Uses of Integer in jdk.jshell

    Method parameters in jdk.jshell with type arguments of type Integer
    Modifier and Type | Method | Description
    --- | --- | ---
    `JShell.Builder` | JShell.Builder.`idGenerator​(BiFunction<Snippet,​Integer,​String> generator)` | Sets the generator of identifying names for Snippets.

  - ### Uses of Integer in jdk.net

    Fields in jdk.net with type parameters of type Integer
    Modifier and Type | Field | Description
    --- | --- | ---
    `static SocketOption<Integer>` | ExtendedSocketOptions.`TCP_KEEPCOUNT` | Keep-Alive retransmission maximum limit.
    `static SocketOption<Integer>` | ExtendedSocketOptions.`TCP_KEEPIDLE` | Keep-Alive idle time.
    `static SocketOption<Integer>` | ExtendedSocketOptions.`TCP_KEEPINTERVAL` | Keep-Alive retransmission interval time.