• • Class List

  • Java AbstractCollection

  • Java AbstractList

  • Java AbstractMap

  • Java AbstractQueue

  • Java AbstractSequentialList

  • Java AbstractSet

  • Java ArrayDeque

  • Java ArrayList

  • Java ArrayList Util

  • Java Arrays

  • Java Base64

  • Java BitSet

  • Java Calendar

  • Java Collection

  • Java Collection Util

  • Java Collections

  • Java Comparator

  • Java Currency

  • Java Date

  • Java Date Duration

  • Java Date Parse

  • Java Date Time

  • Java Date Week

  • Java Deque

  • Java Dictionary

  • Java DoubleSummaryStatistics

  • Java EmptyStackException

  • Java Enumeration

  • Java EnumMap

  • Java EnumSet

  • Java EventObject

  • Java Formattable tutorial with examples

  • Java FormattableFlags

  • Java Formatter

  • Java GregorianCalendar

  • Java GUID

  • Java HashMap

  • Java HashSet

  • Java Hashtable

  • Java IdentityHashMap

  • Java IntSummaryStatistics

  • Java Iterator

  • Java LinkedHashMap

  • Java LinkedHashSet

  • Java LinkedList

  • Java List

  • Java List Util

  • Java ListIterator

  • Java ListResourceBundle

  • Java Locale

  • Java LongSummaryStatistics

  • Java Map

  • Java MissingResourceException

  • Java NavigableMap

  • Java NavigableSet

  • Java NoSuchElementException

  • Java Objects

  • Java Observable

  • Java Observer tutorial with examples

  • Java Optional

  • Java OptionalDouble

  • Java OptionalInt

  • Java OptionalLong

  • Java PrimitiveIterator

  • Java PriorityQueue

  • Java Properties

  • Java PropertyPermission

  • Java PropertyResourceBundle

  • Java Queue

  • Java Random

  • Java ResourceBundle

  • Java Scanner

  • Java ServiceLoader

  • Java Set

  • Java SimpleTimeZone

  • Java SortedMap

  • Java SortedSet

  • Java Spliterator

  • Java Stack

  • Java StringJoiner

  • Java StringTokenizer

  • Java Timer

  • Java TimerTask

  • Java TimeZone

  • Java TreeMap

  • Java TreeSet

  • Java UUID

  • Java Vector

  • Java WeakHashMap

Java java.util OptionalDouble

• Java OptionalDouble average(List<Double> values)
• Java OptionalDouble empty()
• Java OptionalDouble equals(Object obj)
• Java OptionalDouble getAsDouble()
• Java OptionalDouble hashCode()
• Java OptionalDouble ifPresent(DoubleConsumer action)
• Java OptionalDouble ifPresentOrElse(DoubleConsumer action, Runnable emptyAction)
• Java OptionalDouble isEmpty()
• Java OptionalDouble isPresent()
• Java OptionalDouble of(double value)
• Java OptionalDouble orElse(double other)
• Java OptionalDouble orElseGet(DoubleSupplier supplier)
• Java OptionalDouble orElseThrow()
• Java OptionalDouble orElseThrow(Supplier<? extends X> exceptionSupplier)
• Java OptionalDouble stream()
• Java OptionalDouble toString()

Related

• Java Optional sum(final Double d1, final Double d2)
• Java Optional getFirstOrNullDate(final Stream<Timestamp> source)
• Java Optional getNullOrLastDate(final Stream<Timestamp> source)
• Java java.util OptionalDouble
• Java OptionalDouble average(List<Double> values)
• Java OptionalDouble empty()
• Java OptionalDouble equals(Object obj)