In Groovy, why and how does assigning an ArrayList into a HashMap variable works?
I have the following code in Groovy that defies my logic:
HashMap<Integer,NLevelDynamicAlias> nLevelAliases = new ArrayList<>();
It was actually a typo. But the code works fine that I never realized it until I copied the code to a Java method.
How does Groovy allow that to work? Is that part of the supported coercion?
groovy
asked Nov 22 '18 at 7:15
bungrudibungrudi
90711323
add a comment |
I have the following code in Groovy that defies my logic:
HashMap<Integer,NLevelDynamicAlias> nLevelAliases = new ArrayList<>();
It was actually a typo. But the code works fine that I never realized it until I copied the code to a Java method.
How does Groovy allow that to work? Is that part of the supported coercion?
groovy
asked Nov 22 '18 at 7:15
bungrudibungrudi
90711323
add a comment |
I have the following code in Groovy that defies my logic:
HashMap<Integer,NLevelDynamicAlias> nLevelAliases = new ArrayList<>();
It was actually a typo. But the code works fine that I never realized it until I copied the code to a Java method.
How does Groovy allow that to work? Is that part of the supported coercion?
groovy
asked Nov 22 '18 at 7:15
bungrudibungrudi
90711323
I have the following code in Groovy that defies my logic:
HashMap<Integer,NLevelDynamicAlias> nLevelAliases = new ArrayList<>();
It was actually a typo. But the code works fine that I never realized it until I copied the code to a Java method.
How does Groovy allow that to work? Is that part of the supported coercion?
groovy
groovy
asked Nov 22 '18 at 7:15
bungrudibungrudi
90711323
asked Nov 22 '18 at 7:15
bungrudibungrudi
90711323
asked Nov 22 '18 at 7:15
bungrudibungrudi
90711323
asked Nov 22 '18 at 7:15
bungrudibungrudi
90711323
asked Nov 22 '18 at 7:15
bungrudibungrudi
90711323
90711323
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
groovy "magic" ))
try this code:
HashMap<Integer,String> nLevelAliases = [1,2,3];
and you'll get an error:
... due to: groovy.lang.GroovyRuntimeException:
Could not find matching constructor for: java.util.HashMap(java.lang.Integer, java.lang.Integer, java.lang.Integer)
means that groovy tries to find a constructor for type on the left with parameters specified in ArrayList on the right
answered Nov 22 '18 at 7:28
daggettdaggett
8,48221529
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%2f53425653%2fin-groovy-why-and-how-does-assigning-an-arraylist-into-a-hashmap-variable-works%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
groovy "magic" ))
try this code:
HashMap<Integer,String> nLevelAliases = [1,2,3];
and you'll get an error:
... due to: groovy.lang.GroovyRuntimeException:
Could not find matching constructor for: java.util.HashMap(java.lang.Integer, java.lang.Integer, java.lang.Integer)
means that groovy tries to find a constructor for type on the left with parameters specified in ArrayList on the right
answered Nov 22 '18 at 7:28
daggettdaggett
8,48221529
add a comment |
groovy "magic" ))
try this code:
HashMap<Integer,String> nLevelAliases = [1,2,3];
and you'll get an error:
... due to: groovy.lang.GroovyRuntimeException:
Could not find matching constructor for: java.util.HashMap(java.lang.Integer, java.lang.Integer, java.lang.Integer)
means that groovy tries to find a constructor for type on the left with parameters specified in ArrayList on the right
answered Nov 22 '18 at 7:28
daggettdaggett
8,48221529
add a comment |
groovy "magic" ))
try this code:
HashMap<Integer,String> nLevelAliases = [1,2,3];
and you'll get an error:
... due to: groovy.lang.GroovyRuntimeException:
Could not find matching constructor for: java.util.HashMap(java.lang.Integer, java.lang.Integer, java.lang.Integer)
means that groovy tries to find a constructor for type on the left with parameters specified in ArrayList on the right
answered Nov 22 '18 at 7:28
daggettdaggett
8,48221529
groovy "magic" ))
try this code:
HashMap<Integer,String> nLevelAliases = [1,2,3];
and you'll get an error:
... due to: groovy.lang.GroovyRuntimeException:
Could not find matching constructor for: java.util.HashMap(java.lang.Integer, java.lang.Integer, java.lang.Integer)
means that groovy tries to find a constructor for type on the left with parameters specified in ArrayList on the right
answered Nov 22 '18 at 7:28
daggettdaggett
8,48221529
answered Nov 22 '18 at 7:28
daggettdaggett
8,48221529
answered Nov 22 '18 at 7:28
daggettdaggett
8,48221529
answered Nov 22 '18 at 7:28
daggettdaggett
8,48221529
8,48221529
add a comment |
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%2f53425653%2fin-groovy-why-and-how-does-assigning-an-arraylist-into-a-hashmap-variable-works%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
