How do I reference the object being created?

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box;
}

-1

In the middle of building my FXMLDocumentController class I needed to use a lambda expression that creates a new object with some @overrides, in that @overrides I need to reference my object, how to do it?

public class FXMLDocumentController implements Initializable {



    @Override

    public void initialize(URL url, ResourceBundle rb) {



        listViewArtigosMercado.setCellFactory((ListView<String> param) -> new ListCell<String>(){

            @Override

            public void updateItem(String name, boolean empty){

                super.updateItem(name,empty);

                if (name.equals("Vender")){

                    setText(name);

                    ((Node)this).setId("id");

                }

            }

        });

    }

}

I want that my this keyword whether reference itself to my new ListCell<String> rather than FXMLDocumentController
How reference my new class inside of implementation?

edited Mar 2 at 13:25

asked Nov 24 '18 at 14:59

Pedro Correia

Cannot reproduce this error. The only compiler issue in your code seems to be that listViewArtigosMercado is not declared in FXMLDocumentController. BTW: Note that multiple items can be used with the same ListCell. You may end up with cells containing items other than "Vender" unless you add a else clause fixing this. (Same for the text property). Furthermore cells can be empty. In this case item (name) is null which results in a NullPointerException in your code.

– fabian
Nov 25 '18 at 11:40

add a comment |

-1

public class FXMLDocumentController implements Initializable {



    @Override

    public void initialize(URL url, ResourceBundle rb) {



        listViewArtigosMercado.setCellFactory((ListView<String> param) -> new ListCell<String>(){

            @Override

            public void updateItem(String name, boolean empty){

                super.updateItem(name,empty);

                if (name.equals("Vender")){

                    setText(name);

                    ((Node)this).setId("id");

                }

            }

        });

    }

}

I want that my this keyword whether reference itself to my new ListCell<String> rather than FXMLDocumentController
How reference my new class inside of implementation?

edited Mar 2 at 13:25

asked Nov 24 '18 at 14:59

Pedro Correia

Cannot reproduce this error. The only compiler issue in your code seems to be that listViewArtigosMercado is not declared in FXMLDocumentController. BTW: Note that multiple items can be used with the same ListCell. You may end up with cells containing items other than "Vender" unless you add a else clause fixing this. (Same for the text property). Furthermore cells can be empty. In this case item (name) is null which results in a NullPointerException in your code.

– fabian
Nov 25 '18 at 11:40

add a comment |

-1

public class FXMLDocumentController implements Initializable {



    @Override

    public void initialize(URL url, ResourceBundle rb) {



        listViewArtigosMercado.setCellFactory((ListView<String> param) -> new ListCell<String>(){

            @Override

            public void updateItem(String name, boolean empty){

                super.updateItem(name,empty);

                if (name.equals("Vender")){

                    setText(name);

                    ((Node)this).setId("id");

                }

            }

        });

    }

}

I want that my this keyword whether reference itself to my new ListCell<String> rather than FXMLDocumentController
How reference my new class inside of implementation?

edited Mar 2 at 13:25

asked Nov 24 '18 at 14:59

Pedro Correia

public class FXMLDocumentController implements Initializable {



    @Override

    public void initialize(URL url, ResourceBundle rb) {



        listViewArtigosMercado.setCellFactory((ListView<String> param) -> new ListCell<String>(){

            @Override

            public void updateItem(String name, boolean empty){

                super.updateItem(name,empty);

                if (name.equals("Vender")){

                    setText(name);

                    ((Node)this).setId("id");

                }

            }

        });

    }

}

I want that my this keyword whether reference itself to my new ListCell<String> rather than FXMLDocumentController
How reference my new class inside of implementation?

java inheritance javafx this anonymous-class

edited Mar 2 at 13:25

asked Nov 24 '18 at 14:59

Pedro Correia

edited Mar 2 at 13:25

asked Nov 24 '18 at 14:59

Pedro Correia

edited Mar 2 at 13:25

asked Nov 24 '18 at 14:59

Pedro Correia

asked Nov 24 '18 at 14:59

Pedro Correia

asked Nov 24 '18 at 14:59

Pedro Correia

Cannot reproduce this error. The only compiler issue in your code seems to be that listViewArtigosMercado is not declared in FXMLDocumentController. BTW: Note that multiple items can be used with the same ListCell. You may end up with cells containing items other than "Vender" unless you add a else clause fixing this. (Same for the text property). Furthermore cells can be empty. In this case item (name) is null which results in a NullPointerException in your code.

– fabian
Nov 25 '18 at 11:40

add a comment |

Cannot reproduce this error. The only compiler issue in your code seems to be that listViewArtigosMercado is not declared in FXMLDocumentController. BTW: Note that multiple items can be used with the same ListCell. You may end up with cells containing items other than "Vender" unless you add a else clause fixing this. (Same for the text property). Furthermore cells can be empty. In this case item (name) is null which results in a NullPointerException in your code.

– fabian
Nov 25 '18 at 11:40

Cannot reproduce this error. The only compiler issue in your code seems to be that listViewArtigosMercado is not declared in FXMLDocumentController. BTW: Note that multiple items can be used with the same ListCell. You may end up with cells containing items other than "Vender" unless you add a else clause fixing this. (Same for the text property). Furthermore cells can be empty. In this case item (name) is null which results in a NullPointerException in your code.

– fabian
Nov 25 '18 at 11:40

add a comment |

3 Answers
3

active

oldest

votes

-1

Insted of (Node)this use Node.this. You can get the current object of the outer class by calling OuterClass.this.

Then you can just call it's method:

(OuterClass.this).methodOfOuterClass();

answered Nov 24 '18 at 15:08

Gtomika

433312

add a comment |

Remove the cast and this, it's unambiguous call referring to a parent's method:

setId("id");

Look carefully at how you are using setText(name);. The method is from Labeled, but you neither used this nor cast it to that class, simply because there was no need for that. ListCell is a Labeled as well as a Node.

edited Nov 24 '18 at 16:34

answered Nov 24 '18 at 15:06

Andrew Tobilko

28.9k104592

add a comment |

Here, As I can see you are using lambda function inside the initialize method as below.

listViewArtigosMercado.setCellFactory((ListView<String> param) -> new ListCell<String>(){

      @Override

      public void updateItem(String name, boolean empty){

      super.updateItem(name,empty);

      if (name.equals("Vender")){

          setText(name);

              ((Node)this).setId("id");

          }

      }

 });

Lambda does not treat as the anonymous class. So the scope of the lambda function is limited to that particular enclosing close. this is to reference for that particular scop only. so you can not write this.setId('Id'); inside setCelFactor lambda because it does not contain setId method.

Here lambda is treated as a child class of the parent class. In your case, its child class of FXMLDocumentController so it has an accessibility of all public method of parent class so you can use setID or other methods direct without any reference.

answered Nov 24 '18 at 17:03

Dhiral Kaniya

729723

Of course this.setId("id") can be used in the updateItem method. Inside the lambda experssion an anonymus class extending ListCell is created and from the methods of this anonymus class this refers to the ListCell. The cast is unnecessary, but not wrong. (Of course 'Id' is not valid java syntax so this.setId('Id'); won't work)

– fabian
Nov 25 '18 at 11:38

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
});

}
});

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53459430%2fhow-do-i-reference-the-object-being-created%23new-answer', 'question_page');
}
);

Post as a guest

Name

Required, but never shown

3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

-1

Insted of (Node)this use Node.this. You can get the current object of the outer class by calling OuterClass.this.

Then you can just call it's method:

(OuterClass.this).methodOfOuterClass();

answered Nov 24 '18 at 15:08

Gtomika

433312

add a comment |

-1

Insted of (Node)this use Node.this. You can get the current object of the outer class by calling OuterClass.this.

Then you can just call it's method:

(OuterClass.this).methodOfOuterClass();

answered Nov 24 '18 at 15:08

Gtomika

433312

add a comment |

-1

Insted of (Node)this use Node.this. You can get the current object of the outer class by calling OuterClass.this.

Then you can just call it's method:

(OuterClass.this).methodOfOuterClass();

answered Nov 24 '18 at 15:08

Gtomika

433312

Insted of (Node)this use Node.this. You can get the current object of the outer class by calling OuterClass.this.

Then you can just call it's method:

(OuterClass.this).methodOfOuterClass();

answered Nov 24 '18 at 15:08

Gtomika

433312

answered Nov 24 '18 at 15:08

Gtomika

433312

answered Nov 24 '18 at 15:08

Gtomika

433312

answered Nov 24 '18 at 15:08

Gtomika

433312

add a comment |

Remove the cast and this, it's unambiguous call referring to a parent's method:

setId("id");

edited Nov 24 '18 at 16:34

answered Nov 24 '18 at 15:06

Andrew Tobilko

28.9k104592

add a comment |

Remove the cast and this, it's unambiguous call referring to a parent's method:

setId("id");

edited Nov 24 '18 at 16:34

answered Nov 24 '18 at 15:06

Andrew Tobilko

28.9k104592

add a comment |

Remove the cast and this, it's unambiguous call referring to a parent's method:

setId("id");

edited Nov 24 '18 at 16:34

answered Nov 24 '18 at 15:06

Andrew Tobilko

28.9k104592

Remove the cast and this, it's unambiguous call referring to a parent's method:

setId("id");

edited Nov 24 '18 at 16:34

answered Nov 24 '18 at 15:06

Andrew Tobilko

28.9k104592

edited Nov 24 '18 at 16:34

answered Nov 24 '18 at 15:06

Andrew Tobilko

28.9k104592

answered Nov 24 '18 at 15:06

Andrew Tobilko

28.9k104592

answered Nov 24 '18 at 15:06

Andrew Tobilko

28.9k104592

add a comment |

Here, As I can see you are using lambda function inside the initialize method as below.

listViewArtigosMercado.setCellFactory((ListView<String> param) -> new ListCell<String>(){

      @Override

      public void updateItem(String name, boolean empty){

      super.updateItem(name,empty);

      if (name.equals("Vender")){

          setText(name);

              ((Node)this).setId("id");

          }

      }

 });

answered Nov 24 '18 at 17:03

Dhiral Kaniya

729723

Of course this.setId("id") can be used in the updateItem method. Inside the lambda experssion an anonymus class extending ListCell is created and from the methods of this anonymus class this refers to the ListCell. The cast is unnecessary, but not wrong. (Of course 'Id' is not valid java syntax so this.setId('Id'); won't work)

– fabian
Nov 25 '18 at 11:38

add a comment |

Here, As I can see you are using lambda function inside the initialize method as below.

listViewArtigosMercado.setCellFactory((ListView<String> param) -> new ListCell<String>(){

      @Override

      public void updateItem(String name, boolean empty){

      super.updateItem(name,empty);

      if (name.equals("Vender")){

          setText(name);

              ((Node)this).setId("id");

          }

      }

 });

answered Nov 24 '18 at 17:03

Dhiral Kaniya

729723

Of course this.setId("id") can be used in the updateItem method. Inside the lambda experssion an anonymus class extending ListCell is created and from the methods of this anonymus class this refers to the ListCell. The cast is unnecessary, but not wrong. (Of course 'Id' is not valid java syntax so this.setId('Id'); won't work)

– fabian
Nov 25 '18 at 11:38

add a comment |

Here, As I can see you are using lambda function inside the initialize method as below.

listViewArtigosMercado.setCellFactory((ListView<String> param) -> new ListCell<String>(){

      @Override

      public void updateItem(String name, boolean empty){

      super.updateItem(name,empty);

      if (name.equals("Vender")){

          setText(name);

              ((Node)this).setId("id");

          }

      }

 });

answered Nov 24 '18 at 17:03

Dhiral Kaniya

729723

Here, As I can see you are using lambda function inside the initialize method as below.

listViewArtigosMercado.setCellFactory((ListView<String> param) -> new ListCell<String>(){

      @Override

      public void updateItem(String name, boolean empty){

      super.updateItem(name,empty);

      if (name.equals("Vender")){

          setText(name);

              ((Node)this).setId("id");

          }

      }

 });

answered Nov 24 '18 at 17:03

Dhiral Kaniya

729723

answered Nov 24 '18 at 17:03

Dhiral Kaniya

729723

answered Nov 24 '18 at 17:03

Dhiral Kaniya

729723

answered Nov 24 '18 at 17:03

Dhiral Kaniya

729723

Of course this.setId("id") can be used in the updateItem method. Inside the lambda experssion an anonymus class extending ListCell is created and from the methods of this anonymus class this refers to the ListCell. The cast is unnecessary, but not wrong. (Of course 'Id' is not valid java syntax so this.setId('Id'); won't work)

– fabian
Nov 25 '18 at 11:38

add a comment |

Of course this.setId("id") can be used in the updateItem method. Inside the lambda experssion an anonymus class extending ListCell is created and from the methods of this anonymus class this refers to the ListCell. The cast is unnecessary, but not wrong. (Of course 'Id' is not valid java syntax so this.setId('Id'); won't work)

– fabian
Nov 25 '18 at 11:38

Of course this.setId("id") can be used in the updateItem method. Inside the lambda experssion an anonymus class extending ListCell is created and from the methods of this anonymus class this refers to the ListCell. The cast is unnecessary, but not wrong. (Of course 'Id' is not valid java syntax so this.setId('Id'); won't work)

– fabian
Nov 25 '18 at 11:38

add a comment |

draft saved

draft discarded

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.

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Name

Required, but never shown

Name

Required, but never shown

This page is only for reference, If you need detailed information, please check here

搜尋此網誌

Wsrtjtyk