JavaFx初探 fxml

1、Controler 与fxml联系起来

<GridPane fx:controller="sample.Controller"
xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">
<Label GridPane.columnIndex="0" GridPane.rowIndex="0"></Label>
<TextField fx:id="text" GridPane.rowIndex="0" GridPane.columnIndex="1"></TextField>
<Button fx:id="button" GridPane.rowIndex="1" prefWidth="50" onAction="#fun">点我</Button>
</GridPane>

controler中：

public class Controller {
@FXML private Button button;
// @FXML private Text text;
@FXML public void fun(){
System.out.println("hello");
}
}

取得TextField中输入的值：

public class Controller {
@FXML private Button button;
@FXML private TextField text;
@FXML public void fun(){
System.out.println(text.getText());
}
}

若是TextField不小心写成Text会报以下异常：

Caused by: javafx.fxml.LoadException: 

/Users/vyner/Documents/javarepo/beaver/GameFirst/out/production/GameFirst/view/sample.fxml:11

at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2579)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
at sample.Main.start(Main.java:53)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)

Caused by: java.lang.IllegalArgumentException: Can not set javafx.scene.text.Text field sample.Controller.text to javafx.scene.control.TextField
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167)
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171)
at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:81)
at java.lang.reflect.Field.set(Field.java:764)
at javafx.fxml.FXMLLoader.injectFields(FXMLLoader.java:1163)
at javafx.fxml.FXMLLoader.access$1600(FXMLLoader.java:103)
at javafx.fxml.FXMLLoader$ValueElement.processValue(FXMLLoader.java:857)
at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:751)
at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2707)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2527)
... 14 more

Exception running application sample.Main