How do I know which functional interface is associated with the method?How do JavaScript closures work?What's the difference between a method and a function?How do I read / convert an InputStream into a String in Java?var functionName = function() vs function functionName() How to get an enum value from a string value in Java?Set a default parameter value for a JavaScript functionHow do I convert a String to an int in Java?How to reference a method in javadoc?What's the difference between @Component, @Repository & @Service annotations in Spring?Java 8 List<V> into Map<K, V>
What are the steps to solving this definite integral?
Why did C use the -> operator instead of reusing the . operator?
If a planet has 3 moons, is it possible to have triple Full/New Moons at once?
Is there a way to generate a list of distinct numbers such that no two subsets ever have an equal sum?
can anyone help me with this awful query plan?
How to limit Drive Letters Windows assigns to new removable USB drives
As an international instructor, should I openly talk about my accent?
Like totally amazing interchangeable sister outfits II: The Revenge
How do I deal with a coworker that keeps asking to make small superficial changes to a report, and it is seriously triggering my anxiety?
a sore throat vs a strep throat vs strep throat
How to pronounce 'c++' in Spanish
Dynamic SOQL query relationship with field visibility for Users
Why does nature favour the Laplacian?
Re-entry to Germany after vacation using blue card
How does Captain America channel this power?
How to not starve gigantic beasts
'regex' and 'name' directives in find
"You've called the wrong number" or "You called the wrong number"
How to fry ground beef so it is well-browned
How to have a sharp product image?
How did Captain America manage to do this?
Can SQL Server create collisions in system generated constraint names?
Is there any official lore on the Far Realm?
"The cow" OR "a cow" OR "cows" in this context
How do I know which functional interface is associated with the method?
How do JavaScript closures work?What's the difference between a method and a function?How do I read / convert an InputStream into a String in Java?var functionName = function() vs function functionName() How to get an enum value from a string value in Java?Set a default parameter value for a JavaScript functionHow do I convert a String to an int in Java?How to reference a method in javadoc?What's the difference between @Component, @Repository & @Service annotations in Spring?Java 8 List<V> into Map<K, V>
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty height:90px;width:728px;box-sizing:border-box;
map() is associated with the Function interface. And how can I know which interfaces other methods are associated with, for example findFirst()?
java function java-stream
asked Mar 9 at 8:50
Anton SorokinAnton Sorokin
213315
add a comment |
map() is associated with the Function interface. And how can I know which interfaces other methods are associated with, for example findFirst()?
java function java-stream
asked Mar 9 at 8:50
Anton SorokinAnton Sorokin
213315
1
What doesfindFirsthave to do with functional interfaces? It is just a method ofStream.
– MC Emperor
Mar 9 at 8:55
1
I guess you mean theFunctioninterface. You know what findFirst, and all the other Java methods in the world expect by simply reading their javadoc: map expects a Function (see docs.oracle.com/javase/8/docs/api/java/util/stream/…), whereas findFirst() doesn't take any argument (see docs.oracle.com/javase/8/docs/api/java/util/stream/…)
– JB Nizet
Mar 9 at 8:58
@JBNizet Yes, I was wrong, thanks. This is what I was looking for.
– Anton Sorokin
Mar 9 at 9:01
add a comment |
map() is associated with the Function interface. And how can I know which interfaces other methods are associated with, for example findFirst()?
java function java-stream
asked Mar 9 at 8:50
Anton SorokinAnton Sorokin
213315
map() is associated with the Function interface. And how can I know which interfaces other methods are associated with, for example findFirst()?
java function java-stream
java function java-stream
asked Mar 9 at 8:50
Anton SorokinAnton Sorokin
213315
asked Mar 9 at 8:50
Anton SorokinAnton Sorokin
213315
edited Mar 9 at 8:59
Anton Sorokin
asked Mar 9 at 8:50
Anton SorokinAnton Sorokin
213315
asked Mar 9 at 8:50
Anton SorokinAnton Sorokin
213315
asked Mar 9 at 8:50
Anton SorokinAnton Sorokin
213315
213315
1
What doesfindFirsthave to do with functional interfaces? It is just a method ofStream.
– MC Emperor
Mar 9 at 8:55
1
I guess you mean theFunctioninterface. You know what findFirst, and all the other Java methods in the world expect by simply reading their javadoc: map expects a Function (see docs.oracle.com/javase/8/docs/api/java/util/stream/…), whereas findFirst() doesn't take any argument (see docs.oracle.com/javase/8/docs/api/java/util/stream/…)
– JB Nizet
Mar 9 at 8:58
@JBNizet Yes, I was wrong, thanks. This is what I was looking for.
– Anton Sorokin
Mar 9 at 9:01
add a comment |
1
What doesfindFirsthave to do with functional interfaces? It is just a method ofStream.
– MC Emperor
Mar 9 at 8:55
1
I guess you mean theFunctioninterface. You know what findFirst, and all the other Java methods in the world expect by simply reading their javadoc: map expects a Function (see docs.oracle.com/javase/8/docs/api/java/util/stream/…), whereas findFirst() doesn't take any argument (see docs.oracle.com/javase/8/docs/api/java/util/stream/…)
– JB Nizet
Mar 9 at 8:58
@JBNizet Yes, I was wrong, thanks. This is what I was looking for.
– Anton Sorokin
Mar 9 at 9:01
1
1
What does
findFirst have to do with functional interfaces? It is just a method of Stream.– MC Emperor
Mar 9 at 8:55
What does
findFirst have to do with functional interfaces? It is just a method of Stream.– MC Emperor
Mar 9 at 8:55
1
1
I guess you mean the
Function interface. You know what findFirst, and all the other Java methods in the world expect by simply reading their javadoc: map expects a Function (see docs.oracle.com/javase/8/docs/api/java/util/stream/…), whereas findFirst() doesn't take any argument (see docs.oracle.com/javase/8/docs/api/java/util/stream/…)– JB Nizet
Mar 9 at 8:58
I guess you mean the
Function interface. You know what findFirst, and all the other Java methods in the world expect by simply reading their javadoc: map expects a Function (see docs.oracle.com/javase/8/docs/api/java/util/stream/…), whereas findFirst() doesn't take any argument (see docs.oracle.com/javase/8/docs/api/java/util/stream/…)– JB Nizet
Mar 9 at 8:58
@JBNizet Yes, I was wrong, thanks. This is what I was looking for.
– Anton Sorokin
Mar 9 at 9:01
@JBNizet Yes, I was wrong, thanks. This is what I was looking for.
– Anton Sorokin
Mar 9 at 9:01
add a comment |
1 Answer
1
active
oldest
votes
map() is associated with the Functional interface
No, it is not. For the presence of tag java-stream, it's just another API from the class Stream which has the following syntax :
<R> Stream<R> map(Function<? super T,? extends R> mapper)
Yes, the argument used within i.e. Function is a FunctionalInterface. You can find similar FunctionalInterfaces within the java.util.function package of the java.base module (Java-9 above) of the JDK.
answered Mar 9 at 8:59
NamanNaman
46.4k12104206
1
Yes, thx. I thought that findFirst() is connected to the Supplier interface, like a map() with a Function
– Anton Sorokin
Mar 9 at 9:04
add a comment |
Your Answer
StackExchange.ifUsing("editor", function ()
StackExchange.using("externalEditor", function ()
StackExchange.using("snippets", function ()
StackExchange.snippets.init();
);
);
, "code-snippets");
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "1"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f55075582%2fhow-do-i-know-which-functional-interface-is-associated-with-the-method%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
map() is associated with the Functional interface
No, it is not. For the presence of tag java-stream, it's just another API from the class Stream which has the following syntax :
<R> Stream<R> map(Function<? super T,? extends R> mapper)
Yes, the argument used within i.e. Function is a FunctionalInterface. You can find similar FunctionalInterfaces within the java.util.function package of the java.base module (Java-9 above) of the JDK.
answered Mar 9 at 8:59
NamanNaman
46.4k12104206
1
Yes, thx. I thought that findFirst() is connected to the Supplier interface, like a map() with a Function
– Anton Sorokin
Mar 9 at 9:04
add a comment |
map() is associated with the Functional interface
No, it is not. For the presence of tag java-stream, it's just another API from the class Stream which has the following syntax :
<R> Stream<R> map(Function<? super T,? extends R> mapper)
Yes, the argument used within i.e. Function is a FunctionalInterface. You can find similar FunctionalInterfaces within the java.util.function package of the java.base module (Java-9 above) of the JDK.
answered Mar 9 at 8:59
NamanNaman
46.4k12104206
1
Yes, thx. I thought that findFirst() is connected to the Supplier interface, like a map() with a Function
– Anton Sorokin
Mar 9 at 9:04
add a comment |
map() is associated with the Functional interface
No, it is not. For the presence of tag java-stream, it's just another API from the class Stream which has the following syntax :
<R> Stream<R> map(Function<? super T,? extends R> mapper)
Yes, the argument used within i.e. Function is a FunctionalInterface. You can find similar FunctionalInterfaces within the java.util.function package of the java.base module (Java-9 above) of the JDK.
answered Mar 9 at 8:59
NamanNaman
46.4k12104206
map() is associated with the Functional interface
No, it is not. For the presence of tag java-stream, it's just another API from the class Stream which has the following syntax :
<R> Stream<R> map(Function<? super T,? extends R> mapper)
Yes, the argument used within i.e. Function is a FunctionalInterface. You can find similar FunctionalInterfaces within the java.util.function package of the java.base module (Java-9 above) of the JDK.
answered Mar 9 at 8:59
NamanNaman
46.4k12104206
answered Mar 9 at 8:59
NamanNaman
46.4k12104206
answered Mar 9 at 8:59
NamanNaman
46.4k12104206
answered Mar 9 at 8:59
NamanNaman
46.4k12104206
46.4k12104206
1
Yes, thx. I thought that findFirst() is connected to the Supplier interface, like a map() with a Function
– Anton Sorokin
Mar 9 at 9:04
add a comment |
1
Yes, thx. I thought that findFirst() is connected to the Supplier interface, like a map() with a Function
– Anton Sorokin
Mar 9 at 9:04
1
1
Yes, thx. I thought that findFirst() is connected to the Supplier interface, like a map() with a Function
– Anton Sorokin
Mar 9 at 9:04
Yes, thx. I thought that findFirst() is connected to the Supplier interface, like a map() with a Function
– Anton Sorokin
Mar 9 at 9:04
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f55075582%2fhow-do-i-know-which-functional-interface-is-associated-with-the-method%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
1
What does
findFirsthave to do with functional interfaces? It is just a method ofStream.– MC Emperor
Mar 9 at 8:55
1
I guess you mean the
Functioninterface. You know what findFirst, and all the other Java methods in the world expect by simply reading their javadoc: map expects a Function (see docs.oracle.com/javase/8/docs/api/java/util/stream/…), whereas findFirst() doesn't take any argument (see docs.oracle.com/javase/8/docs/api/java/util/stream/…)– JB Nizet
Mar 9 at 8:58
@JBNizet Yes, I was wrong, thanks. This is what I was looking for.
– Anton Sorokin
Mar 9 at 9:01