java - Java 12.0.1 中的 JavaFX
问题描述
我无法让 OpenJFX 在我的项目中工作。我将库导入到我的 IntelliJ 项目中，它解决了所有构建错误，但是当我启动程序时没有任何反应。控制台没有给我任何输出。该程序启动，然后无限期地运行，没有显示任何内容。当我停止程序时，它说Process finished with exit code 130 (interrupted by signal 2: SIGINT)
主.java
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class Main extends Application {
public static void main(String[] args) {
}
@Override
public void start(Stage stage) throws Exception {
stage.setTitle("Binary Clock");
stage.setScene(new Scene(FXMLLoader.load(getClass().getResource("clock_gui.fxml"))));
stage.show();
}
}
clock_gui.fxml（由 SceneBuilder 创建）
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.shape.Rectangle?>
<AnchorPane prefHeight="276.0" prefWidth="344.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="ClockGui">
<children>
<HBox layoutX="100.0" layoutY="125.0" spacing="4.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<children>
<VBox id="hour_tenner" prefWidth="50.0" spacing="4.0">
<children>
<Rectangle id="ht8" fx:id="ht8" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0">
<VBox.margin>
<Insets />
</VBox.margin>
</Rectangle>
<Rectangle id="ht4" fx:id="ht4" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0" />
<Rectangle id="ht2" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0" />
<Rectangle id="ht1" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0" />
</children>
</VBox>
<VBox id="hour_single" prefWidth="50.0" spacing="4.0">
<children>
<Rectangle id="hs8" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0">
<VBox.margin>
<Insets />
</VBox.margin>
</Rectangle>
<Rectangle id="hs4" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0" />
<Rectangle id="hs2" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0" />
<Rectangle id="hs1" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0" />
</children>
</VBox>
<VBox id="minute_tenner" prefWidth="50.0" spacing="4.0">
<children>
<Rectangle id="mt8" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0">
<VBox.margin>
<Insets />
</VBox.margin>
</Rectangle>
<Rectangle id="mt4" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0" />
<Rectangle id="mt2" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0" />
<Rectangle id="mt1" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0" />
</children>
</VBox>
<VBox id="minute_single" prefWidth="50.0" spacing="4.0">
<children>
<Rectangle id="ms8" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0">
<VBox.margin>
<Insets />
</VBox.margin>
</Rectangle>
<Rectangle id="ms4" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0" />
<Rectangle id="ms2" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0" />
<Rectangle id="ms1" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="64.0" stroke="BLACK" strokeType="INSIDE" width="64.0" />
</children>
</VBox>
<VBox prefHeight="200.0" prefWidth="100.0" spacing="4.0">
<children>
<Button fx:id="start" mnemonicParsing="false" onMouseClicked="#ClockGui" prefHeight="30.0" prefWidth="64.0" text="start">
<VBox.margin>
<Insets bottom="102.0" />
</VBox.margin>
</Button>
<HBox prefHeight="100.0" prefWidth="200.0" spacing="4.0">
<children>
<VBox id="second_tenner" prefWidth="50.0" spacing="4.0">
<children>
<Rectangle id="st8" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="30.0" stroke="BLACK" strokeType="INSIDE" width="30.0">
<VBox.margin>
<Insets />
</VBox.margin>
</Rectangle>
<Rectangle id="st4" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="30.0" stroke="BLACK" strokeType="INSIDE" width="30.0" />
<Rectangle id="st2" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="30.0" stroke="BLACK" strokeType="INSIDE" width="30.0" />
<Rectangle id="st1" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="30.0" stroke="BLACK" strokeType="INSIDE" width="30.0" />
</children>
</VBox>
<VBox id="second_single" prefWidth="50.0" spacing="4.0">
<children>
<Rectangle id="ss8" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="30.0" stroke="BLACK" strokeType="INSIDE" width="30.0">
<VBox.margin>
<Insets />
</VBox.margin>
</Rectangle>
<Rectangle id="ss4" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="30.0" stroke="BLACK" strokeType="INSIDE" width="30.0" />
<Rectangle id="ss2" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="30.0" stroke="BLACK" strokeType="INSIDE" width="30.0" />
<Rectangle id="ss1" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="30.0" stroke="BLACK" strokeType="INSIDE" width="30.0" />
</children>
</VBox>
</children>
</HBox>
</children>
</VBox>
</children>
<padding>
<Insets bottom="4.0" left="4.0" right="4.0" top="4.0" />
</padding>
</HBox>
</children>
</AnchorPane>
ClockGui.java（作为控制器）
import javafx.fxml.FXML;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
public class ClockGui {
@FXML
private Rectangle ht8;
public ClockGui(){
ht8.setFill(Color.rgb(225,250,30));
}
}
我在 Ubuntu 18.04.2 LTS 上。
解决方案
你说你启动了虚拟机，但它“什么都不做”。原因主要在于：
public static void main(String[] args) {
}
这是您的应用程序的入口点，但您并没有要求它调用您的应用程序类......
正如您可以从 (Javadoc]( https://openjfx.io/javadoc/12/javafx.graphics/javafx/application/Application.html#launch(java.lang.String...) ) 中读到的那样，这是启动独立应用程序所需的方法，通常从main.
只需添加以下内容：
public static void main(String[] args) {
launch(args);
}
并再次运行。
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