Uses of Class com.google.common.base.Optional

Uses of Class
com.google.common.base.Optional

Packages that use Optional

Package	Description
com.google.common.base	Basic utility libraries and interfaces.
com.google.common.collect	This package contains generic collection interfaces and implementations, and other utilities for working with collections.
com.google.common.net	This package contains utility methods and classes for working with net addresses (numeric IP and domain names).

Uses of Optional in com.google.common.base

Methods in that return

Modifier and Type	Method and Description
`static <T> Optional<T>`	Optional.`absent()` Returns an `Optional` instance with no contained reference.
`static <T> Optional<T>`	Optional.`fromNullable(T nullableReference)` If `nullableReference` is non-null, returns an `Optional` instance containing that reference; otherwise returns `absent()`.
`static <T extends Enum<T>> Optional<T>`	Enums.`getIfPresent(Class<T> enumClass, String value)` Returns an optional enum constant for the given type, using `Enum.valueOf(java.lang.Class<T>, java.lang.String)`.
`static <T> Optional<T>`	Optional.`of(T reference)` Returns an `Optional` instance containing the given non-null reference.
`abstract Optional<T>`	Optional.`or(Optional<? extends T> secondChoice)` Returns this `Optional` if it has a value present; `secondChoice` otherwise.
`abstract <V> Optional<V>`	Optional.`transform(Function<? super T,V> function)` If the instance is present, it is transformed with the given `Function`; otherwise, `absent()` is returned.

Methods in with parameters of type

Modifier and Type	Method and Description
`abstract Optional<T>`	Optional.`or(Optional<? extends T> secondChoice)` Returns this `Optional` if it has a value present; `secondChoice` otherwise.

Method parameters in com.google.common.base with type arguments of type Optional

Modifier and Type	Method and Description
`static <T> Iterable<T>`	Optional.`presentInstances(Iterable<? extends Optional<? extends T>> optionals)` Returns the value of each present instance from the supplied `optionals`, in order, skipping over occurrences of `absent()`.

Uses of Optional in com.google.common.collect

Methods in com.google.common.collect that return Optional

Modifier and Type	Method and Description
`Optional<E>`	FluentIterable.`first()` Returns an `Optional` containing the first element in this fluent iterable.
`Optional<E>`	FluentIterable.`firstMatch(Predicate<? super E> predicate)` Returns an `Optional` containing the first element in this fluent iterable that satisfies the given predicate, if such an element exists.
`Optional<E>`	FluentIterable.`last()` Returns an `Optional` containing the last element in this fluent iterable.
`abstract Optional<T>`	BinaryTreeTraverser.`leftChild(T root)` Returns the left child of the specified node, or `absent()` if the specified node has no left child.
`abstract Optional<T>`	BinaryTreeTraverser.`rightChild(T root)` Returns the right child of the specified node, or `absent()` if the specified node has no right child.
`static <T> Optional<T>`	Iterables.`tryFind(Iterable<T> iterable, Predicate<? super T> predicate)` Returns an `Optional` containing the first element in `iterable` that satisfies the given predicate, if such an element exists.
`static <T> Optional<T>`	Iterators.`tryFind(Iterator<T> iterator, Predicate<? super T> predicate)` Returns an `Optional` containing the first element in `iterator` that satisfies the given predicate, if such an element exists.

Uses of Optional in com.google.common.net

Methods in com.google.common.net that return Optional

Modifier and Type	Method and Description
`Optional<Charset>`	MediaType.`charset()` Returns an optional charset for the value of the charset parameter if it is specified.