获取javafx中的所有文本字段值和id
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Get all text fields values and id in javafx
提问by Anshul Parashar
I have an anchor pane with many text fields and other controls. I want to take values of all controls and their names and id.
我有一个带有许多文本字段和其他控件的锚定窗格。我想获取所有控件的值及其名称和 ID。
For example: how can I clear all textfield values?
例如：如何清除所有文本字段值？
采纳答案by Sergey Grinev
Straightforward solution would be just traversing all children of AnchorPane and looking for TextFields:
直接的解决方案就是遍历 AnchorPane 的所有子项并寻找 TextFields：
for (Node node : anchorPane.getChildren()) {
System.out.println("Id: " + node.getId());
if (node instanceof TextField) {
// clear
((TextField)node).setText("");
}
}
回答by George Siggouroglou
In case you need a recursive way test this,
如果你需要一个递归的方式来测试这个，
public class NodeUtils {
public static <T extends Pane> Map<Node, Object> formValues(T parent) {
return formValues(parent, new HashMap<>());
}
private static <T extends Pane> Map<Node, Object> formValues(T parent, Map<Node, Object> map) {
for (Node node : parent.getChildren()) {
// Nodes - You can add more.
if (node instanceof TextField) {
map.put(node, ((TextField) node).getText());
}
if (node instanceof PasswordField) {
map.put(node, ((PasswordField) node).getText());
}
if (node instanceof TextArea) {
map.put(node, ((TextArea) node).getText());
}
if (node instanceof CheckBox) {
map.put(node, ((CheckBox) node).isSelected());
}
// Recursive.
if (node instanceof Pane) {
formValues((Pane) node, map);
}
}
return map;
}
}
Test source,
测试源，
Map<Node, Object> formValues = NodeUtils.formValues(source);
Get only the nodes
只获取节点
public class NodeUtils {
public static ArrayList<Node> getAllNodes(Parent root) {
ArrayList<Node> nodes = new ArrayList<>();
addAllDescendents(root, nodes);
return nodes;
}
private static void addAllDescendents(Parent parent, ArrayList<Node> nodes) {
// Get children.
List<Node> children = Collections.EMPTY_LIST;
if (parent instanceof ButtonBar) {
children = ((ButtonBar) parent).getButtons();
} else if (parent instanceof TabPane) {
for (Tab tab : ((TabPane) parent).getTabs()) {
Node tabContent = tab.getContent();
if (tabContent instanceof Parent) {
addAllDescendents((Parent) tab.getContent(), nodes);
} else {
// You can log and get a type that is not supported.
}
}
} else {
children = parent.getChildrenUnmodifiable();
}
// Add nodes.
for (Node node : children) {
nodes.add(node);
if (node instanceof Parent) {
addAllDescendents((Parent) node, nodes);
}
}
}
}
Test source,
测试源，
List<Node> nodes = NodeUtils.getAllNodes(aPaneOrAnotherParentObject);
回答by ddnStack
Heres a Java 8 version:
这是 Java 8 版本：
anchorPane.getChildren()
.filtered(node -> node instanceof TextField)
.forEach(node -> ((TextField)node).setText(""));
