Question

我刚刚使用netbins IDE使用javaFX创建了一个非常小的项目，用户将获得一些随机数。这是我的输出：

我的问题是：

数字在水平左对齐显示。我怎样才能将它们放在关卡的中心？
我可以修改用户无法更改的完整输出屏幕的大小吗？

我的代码：

GenerateRandomNumber.java

 /*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package generaterandomnumber;

import java.io.IOException;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

/**
 *
 * @author USER
 */
public class GenerateRandomNumber extends Application {

    private Stage stage;
    private double decorationWidth;
    private double decorationHeight;
    @Override
    public void start(Stage primaryStage) throws Exception {

        this.stage = stage;
        final double initialSceneWidth = 500;
        final double initialSceneHeight = 300;

        final Parent root=FXMLLoader.load(getClass().getResource("main.fxml"));
        Scene scene = new Scene(root, initialSceneWidth, initialSceneHeight);
        scene.getStylesheets().add(getClass().getResource("main.css").toExternalForm());
        primaryStage.setTitle("Generating Random Numbers");
        primaryStage.setScene(scene);
        primaryStage.show();
        this.decorationWidth = initialSceneWidth - scene.getWidth();
        this.decorationHeight = initialSceneHeight - scene.getHeight();
    }

    public static void main(String[] args) {
        launch(args);
    }

}

main.fxml

 <?xml version="1.0" encoding="UTF-8"?>

<?import java.net.URL?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.AnchorPane?>

<AnchorPane id="AnchorPane" prefHeight="300.0" prefWidth="500.0" styleClass="mainFxmlClass" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8.0.141" fx:controller="generaterandomnumber.MainController">
    <stylesheets>
        <URL value="@main.css" />
    </stylesheets>
   <children>
      <Button fx:id="Clickme" layoutX="209.0" layoutY="182.0" mnemonicParsing="false" onAction="#generateRandom" prefHeight="32.0" prefWidth="85.0" text="Click me" />
      <Label fx:id="myMessage" layoutX="139.0" layoutY="53.0" prefHeight="96.0" prefWidth="220.0" />
      <Button fx:id="Exit" layoutX="226.0" layoutY="228.0" mnemonicParsing="false" onAction="#exit" prefHeight="25.0" prefWidth="50.0" text="Exit" />
   </children>
</AnchorPane>

的main.css

.mainFxmlClass {

}
#Clickme{
    -fx-font-size: 15px;
    -fx-background-color: blue;
    -fx-text-fill: white;
    -fx-padding: 6 6 6 6;
    -fx-border-radius: 8;
    -fx-fill-width: bold;
}
#Exit{
     -fx-font-size: 15px;
     -fx-background-color: blueviolet;
     -fx-text-fill: white;
     -fx-fill-width: bold;
}
#myMessage{
    -fx-font-size: 25px;
    -fx-background-color:wheat;
    -fx-text-fill: purple;
    -fx-padding: 6 6 6 6;
    -fx-border-radius: 8;
    -fx-fill-width: bold;
    -fx-text-alignment: center;
}
.root{
    -fx-background-color:whitesmoke;
}

MainController.java

package generaterandomnumber;

import java.net.URL;
import java.util.Random;
import java.util.ResourceBundle;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Label;

public class MainController implements Initializable {
    @FXML
    private Label myMessage;
    public void generateRandom(ActionEvent event){
        Random rand = new Random();
        int myrand = rand.nextInt(50)+1;
        myMessage.setText(Integer.toString(myrand));
    }
    public void exit(ActionEvent event){
        System.exit(0);
    }
    @Override
    public void initialize(URL url, ResourceBundle rb) {
        // TODO
    }    

}

Answer 1

要将生成的数字放在中心，您必须将 alignment =＆＃34; CENTER＆＃34; 添加到标签元素：

<Label fx:id="myMessage" alignment="CENTER" layoutX="139.0" layoutY="53.0" prefHeight="96.0" prefWidth="220.0">

要修复窗口大小，请添加到 GenerateRandomNumber.start（）方法：

primaryStage.setResizable(false);

setResizable()方法允许设置属性resizable

的值

如何在JavaFX中将输出放在级别的中心？

1 个答案: