我在sample.fxml中创建的按钮在编译后没有显示,我使用SceneBuilder创建了它们。我也尝试再次编译以进行重建。经过一切尝试,我变得束手无策,问题仍然出在他们身上。一点帮助会很好。
main.java
package sample;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class Main extends Application {
@Override
public void start(Stage primaryStage) throws Exception {
try {
Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
Scene scene = new Scene(root, 300, 275);
primaryStage.setTitle("Hello World");
primaryStage.show();
} catch (Exception e)
{
e.printStackTrace();
}
}
public static void main(String[] args) {
launch(args);
}
}
controller.java
package sample;
import javafx.event.ActionEvent;
import java.util.Random;
public class Controller {
public void generateRandom(ActionEvent event)
{
Random rand = new Random();
int number = rand.nextInt(50)+1;
System.out.println(Integer.toString(number));
}
}
sample.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane prefHeight="476.0" prefWidth="497.0" xmlns="http://javafx.com/javafx/8.0.121" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">
<children>
<Button fx:id="clickme" layoutX="192.0" layoutY="299.0" mnemonicParsing="false" onAction="#generateRandom" prefHeight="52.0" prefWidth="93.0" text="Click me" />
<Label layoutX="155.0" layoutY="152.0" prefHeight="71.0" prefWidth="166.0" />
</children>
</AnchorPane>
答案 0 :(得分:3)
您在Scene
中创建了一个新的Main
,但从未在舞台上摆好场景。
在创建标题后添加primaryStage.setScene(scene);
以将场景添加到舞台:
@Override
public void start(Stage primaryStage) throws Exception {
try {
Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
Scene scene = new Scene(root, 300, 275);
primaryStage.setScene(scene); // Add this line
primaryStage.setTitle("Hello World");
primaryStage.show();
} catch (Exception e) {
e.printStackTrace();
}
}