請注意,可以將數據作爲GoXR3Plus的答案存儲在ArrayList
中。但是你不能在fxml中創建一個數組。爲此,您需要從java代碼創建數組(例如,在initialize
方法中)並將一些信息附加到允許您檢索索引信息的Node
。
這可以例如通過使用靜態輔助方法來附加信息,以及一個CSS類選擇的節點,並注入這些節點中的一個共同的祖先到控制器來完成:
<VBox fx:id="root" prefHeight="400.0" prefWidth="600.0" xmlns:fx="http://javafx.com/fxml/1" fx:controller="fxml.arraystore.StoreController">
<children>
<Button text="1" Helper.indices="0 0"/>
<Button text="2" Helper.indices="0 1"/>
<Button text="3" Helper.indices="1 1"/>
<Button text="4" Helper.indices="1 0"/>
<Button text="5" Helper.indices="2 0"/>
<Button text="6" Helper.indices="2 1"/>
</children>
</VBox>
助手
public class Helper {
private static final String MARK_CLASS = "array-store-mark";
private static final String MARK_CLASS_SELECTOR = "." + MARK_CLASS;
private static final String INDICES_KEY = "arrayStoreIndices";
public static void setIndices(Node node, String indices) {
if (node == null || indices == null) {
throw new IllegalArgumentException();
}
String[] parts = indices.split("\\s+");
int[] is = new int[]{Integer.parseInt(parts[0]), Integer.parseInt(parts[1])};
// add css class
node.getStyleClass().add(MARK_CLASS);
// add index data
node.getProperties().put(INDICES_KEY, is);
}
public static <T extends Node> T[][] getAsArray(Node parent, Class<T> nodeClass) {
if (parent == null) {
throw new IllegalArgumentException();
}
int max1 = 0;
int max2 = 0;
// find nodes by class
Set<Node> marked = parent.lookupAll(MARK_CLASS_SELECTOR);
// find array size
for (Node n : marked) {
n.getStyleClass().remove(MARK_CLASS);
if (nodeClass.isAssignableFrom(n.getClass())) {
int[] is = (int[]) n.getProperties().get(INDICES_KEY);
if (max1 < is[0]) {
max1 = is[0];
}
if (max2 < is[1]) {
max2 = is[1];
}
}
}
T[][] result = (T[][]) Array.newInstance(nodeClass, max1+1, max2+1);
// put data in array
for (Node n : marked) {
int[] is = (int[]) n.getProperties().remove(INDICES_KEY);
if (nodeClass.isAssignableFrom(n.getClass())) {
result[is[0]][is[1]] = (T) n;
}
}
return result;
}
}
控制器類別
public class StoreController {
// common parent
@FXML
private Parent root;
private Button[][] buttons;
@FXML
private void initialize() {
buttons = Helper.getAsArray(root, Button.class);
System.out.println(Arrays.deepToString(buttons));
}
}
非常感謝!我完全理解它 –