{"id":1905,"date":"2013-06-02T22:21:20","date_gmt":"2013-06-02T20:21:20","guid":{"rendered":"http:\/\/www.tutego.de\/blog\/javainsel\/?p=1905"},"modified":"2013-06-02T22:21:20","modified_gmt":"2013-06-02T20:21:20","slug":"na-endlich-sieht-java-8s-optional-typ-besser-aus","status":"publish","type":"post","link":"https:\/\/www.tutego.de\/blog\/javainsel\/2013\/06\/na-endlich-sieht-java-8s-optional-typ-besser-aus\/","title":{"rendered":"Na endlich sieht Java 8’s Optional-Typ besser aus"},"content":{"rendered":"

http:\/\/download.java.net\/jdk8\/docs\/api\/java\/util\/Optional.html<\/a>:<\/p>\n

static <T> Optional<\/a><T><\/code>
empty<\/a><\/strong>()<\/code><\/p>\n

Returns an empty Optional<\/code> instance.<\/p>\n

boolean<\/code>
equals<\/a><\/strong>(Object<\/a> obj)<\/code><\/p>\n

Indicates whether some other object is "equal to" this Optional.<\/p>\n

T<\/a><\/code>
get<\/a><\/strong>()<\/code><\/p>\n

If a value is present in this Optional<\/code>, returns the value, otherwise throws NoSuchElementException<\/code>.<\/p>\n

int<\/code>
hashCode<\/a><\/strong>()<\/code><\/p>\n

Returns the hash code value of the present value, if any, or 0 (zero) if no value is present.<\/p>\n

void<\/code>
ifPresent<\/a><\/strong>(Consumer<\/a><? super T<\/a>> consumer)<\/code><\/p>\n

Have the specified consumer accept the value if a value is present, otherwise do nothing.<\/p>\n

boolean<\/code>
isPresent<\/a><\/strong>()<\/code><\/p>\n

Return true<\/code> if there is a value present, otherwise false<\/code>.<\/p>\n

static <T> Optional<\/a><T><\/code>
of<\/a><\/strong>(T value)<\/code><\/p>\n

Return an Optional<\/code> with the specified present value.<\/p>\n

T<\/a><\/code>
orElse<\/a><\/strong>(T<\/a> other)<\/code><\/p>\n

Return the value if present, otherwise return other<\/code>.<\/p>\n

T<\/a><\/code>
orElseGet<\/a><\/strong>(Supplier<\/a><? extends T<\/a>> other)<\/code><\/p>\n

Return the value if present, otherwise invoke other<\/code> and return the result of that invocation.<\/p>\n

<X extends Throwable<\/a>>
T<\/a><\/code>
orElseThrow<\/a><\/strong>(Supplier<\/a><? extends X> exceptionSupplier)<\/code><\/p>\n

Return the contained value, if present, otherwise throw an exception to be created by the provided supplier.<\/p>\n

String<\/a><\/code>
toString<\/a><\/strong>()<\/code><\/p>\n

Returns a non-empty string representation of this Optional suitable for debugging.<\/p>\n

 <\/p>\n

Was mir immer noch fehlt: fromNullable(v). Arg, das fehlt.<\/p>\n","protected":false},"excerpt":{"rendered":"

http:\/\/download.java.net\/jdk8\/docs\/api\/java\/util\/Optional.html: static <T> Optional<T> empty() Returns an empty Optional instance. boolean equals(Object obj) Indicates whether some other object is "equal to" this Optional. T get() If a value is present in this Optional, returns the value, otherwise throws NoSuchElementException. int hashCode() Returns the hash code value of the present value, if any, or 0 (zero) […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[66],"tags":[],"class_list":["post-1905","post","type-post","status-publish","format-standard","hentry","category-java-8"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/posts\/1905","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/comments?post=1905"}],"version-history":[{"count":0,"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/posts\/1905\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/media?parent=1905"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/categories?post=1905"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tutego.de\/blog\/javainsel\/wp-json\/wp\/v2\/tags?post=1905"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}