how to count up variables in java

Question

my problem is the following: I want to set all panes white, just like this:

    paneVfeld1.setStyle("-fx-background-color: white");
    paneVfeld2.setStyle("-fx-background-color: white");
    paneVfeld3.setStyle("-fx-background-color: white");
    paneVfeld4.setStyle("-fx-background-color: white");
    paneVfeld5.setStyle("-fx-background-color: white");
    paneVfeld6.setStyle("-fx-background-color: white");
    paneVfeld7.setStyle("-fx-background-color: white");
    paneVfeld8.setStyle("-fx-background-color: white");
    paneVfeld9.setStyle("-fx-background-color: white");
    paneVfeld10.setStyle("-fx-background-color: white");

But i seriously can´t do this for all my 42 panes, how can i shorten that, with an Array?, anything else?, thx for the help :)

An array or probably even better a List sounds like a good idea. — assylias
– assylias, Commented Nov 13, 2017 at 15:14
get rid of pane variables and use arraylist or array to store references then use index — Pavneet_Singh
– Pavneet_Singh, Commented Nov 13, 2017 at 15:14

Sync · Accepted Answer · 2017-11-13 15:30:21Z

0

You can put all your paneVfelds into a List and then iterate over it. For example:

List<PaneVfeld> paneVfelds = new ArrayList<>();
paneVfelds.forEach(paneVfeld -> paneVfeld.setStyle("-fx-background-color: white"));

answered Nov 13, 2017 at 15:30

Sync

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Comments

Joop Eggen · Accepted Answer · 2017-11-13 15:32:19Z

There is no separate CSS class for a Pane, but you might create one. You still have to add the style to every class.

This allows adding more styles and for instance offering a "dark" theme.

.paperpane {
    -fx-background-color: white;
}

So the hard way:

Pane[] panes = new Pane[] { paneVfeld1, paneVfeld2, ... };
for (Pane pane : panes) {
   pane.getStyleClass().add("paperpane");
}

or make an artifical base class derived from Pane that in the constructor sets it to white (ugly though, as restrictive and abuse of inheritance).

To do a bulk change, if all those panes are children of one container, you could iterate over its children.

However the regular numbered names seem to indicate, you could better create an array or list of panes:

Pane[] vFelder = new Pane[10];
for (int i = 0; i < vFelder.length; ++i) ...

ACV · Accepted Answer · 2017-11-13 15:34:09Z

0

formatFields(String style, Pane... panes) {
 for (Pane pane : panes) {
 if (pane!=null) {
  pane.setStyle(style);
}
}
}

and then call:

formatFields("-fx-background-color: white", field1, field2, field3, field4);

answered Nov 13, 2017 at 15:34

ACV

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Comments

fxrbfg · Accepted Answer · 2017-11-13 15:35:31Z

0

You don't need manually put fields to array or list or especially use reflection(it's a bad practice almost in all cases) Simple find Parent where all your panes reside and apply action to all its children.

  Parent parent = //parent where all your panes resides;
  parent.getChildrenUnmodifiable()
              .forEach(pane -> pane.setStyle("-fxbackground-color: white"));

answered Nov 13, 2017 at 15:35

fxrbfg

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