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| Packages that use Optional | |
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| 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. |
| Uses of Optional in com.google.common.base |
|---|
| Methods in com.google.common.base that return Optional | ||
|---|---|---|
static
|
Optional.absent()
Returns an Optional instance with no contained reference. |
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static
|
Optional.fromNullable(T nullableReference)
If nullableReference is non-null, returns an Optional instance containing that
reference; otherwise returns absent(). |
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static
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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. |
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| Methods in com.google.common.base with parameters of type Optional | |
|---|---|
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 | ||
|---|---|---|
static
|
Optional.presentInstances(Iterable<Optional<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 | ||
|---|---|---|
static
|
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. |
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static
|
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. |
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