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Mysterious " The color components or name must be specified " error in JavaFX ListView


Mysterious " The color components or name must be specified " error in JavaFX ListView

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Mysterious " The color components or name must be specified " error in JavaFX ListView
Tag : java , By : jaredsmiller
Date : December 01 2020, 04:52 PM

this one helps. The item property of a ListCell initially is null. Color.web does not accept null as parameter. Furthermore you need to be able to handle the fact that the item of a ListCell can be replaced during its lifecycle and that the same item may be assigned to different cells. ListView creates only cells that are needed to fill the view and if e.g. the viewport of the scrollable area changes, different items need to be visible and the cells are reused to display the changed set of items.
If you worry about the performance of some calculation in updateItem, you could cache the results in a map (possibly wrapping the values in SoftReferences, if you're worried about memory consumption).
public class cell extends ListCell<String> {
    private final Rectangle rect;

    cell() {
        super();
        this.rect = new Rectangle(20,20);
        setGraphic(this.rect);
    }

    @Override
    protected void updateItem(String s, boolean empty) {
        super.updateItem(s, empty);
        if(empty)
            rect.setVisible(false);
        else {
            rect.setFill(Color.web(getItem()));
            rect.setVisible(true);
        }
    }
}

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File Encoding - Mysterious "?" Mark and "ILLEGAL Token" Error Messages


Tag : javascript , By : user185283
Date : March 29 2020, 07:55 AM
seems to work fine Hard to say with much confidence, but weird characters at the start of text files are very often the Byte Order Mark (BOM). See http://en.wikipedia.org/wiki/Byte_Order_Mark. Some software handles them well, and you see nothing, other software doesn't handle them correctly and you see weird characters.

Error: "message": "Unknown path components: /photos&callback=" code: 2500"


Tag : development , By : Michael
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further You're calling /photos&callback=....
it should be /photos?callback=...

JavaFX Intellij error "Error:java: invalid flag: --add-modules=javafx.fxml,javafx.graphics,javafx.controls,javafx.b


Tag : java , By : tangsty
Date : March 29 2020, 07:55 AM
this will help to ItachiUchiha for leading me to the answer.
Checking the SDK for my pc revealed that there was no SDK selected. I'm not sure how it was working before.

JavaFX 11: "JavaFX runtime components are missing"


Tag : java , By : CookingCoder
Date : March 29 2020, 07:55 AM
wish of those help As a first time user, I've managed to make it work, but it was not straightforward to me.
I guess there are no many people familiarized with this IDE, so I'm going to post the steps I followed, as a basic tutorial:
----jGRASP exec: java HelloFX
Error: JavaFX runtime components are missing, and are required to run this application

 ----jGRASP wedge: exit code for process is 1.
 ----jGRASP: operation complete.
--module-path /Users/<user>/Downloads/javafx-sdk-11.0.2/lib --add-modules javafx.controls
----jGRASP exec: java HelloFX --module-path /Users/<user>/Downloads/javafx-sdk-11.0.2/lib --add-modules javafx.controls
java %S -ea %S %<FLAGS2> %<MAIN_CLASS> %<ARGS>
--module-path /Users/<user>/Downloads/javafx-sdk-11.0.2/lib --add-modules javafx.controls
----jGRASP exec: java --module-path /Users/<user>/Downloads/javafx-sdk-11.0.2/lib --add-modules javafx.controls HelloFX

 ----jGRASP: operation complete.

Java 8 + JavaFX on macOS: "ERROR: JavaFX runtime components are missing, and are required to run this application.&


Tag : java , By : Raghaw
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I don't know how you back your assumption but I'd say most user nowadays do not have Java installed at all anymore. The modern trend is to bundle Java with the application so that you can distribute it like any other application and then it does not make any sense anymore to stick with an outdated version of Java. See here https://github.com/dlemmermann/JPackageScriptFX how that can be done.
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