JavaFX中使用Gradle时需要位置 [英] Location is required in JavaFX with gradle

问题描述

java.lang.NullPointerException：位置是必需的。

当我在使用gradle和javafx插件组装后运行程序时。如果我从IntelliJ Idea运行它，一切都可以。 Java源文件和.fxml位于某些包中。

build.gradle

 < code apply apply plugin：'java'
 apply plugin：'application'
 apply plugin：'idea'
 apply from：'javafx.plugin'
 
 javafx {
 javaRuntime ='C：\\ Program Files \\Java\\jdk1.7.0_45'
 
 appID'FXMLExample'
 appName' fxml示例应用程序'
 mainClass'local.hz.FXMLExample'
} 
 
任务create-dirs{
 sourceSets * .java.srcDirs * .each { it.mkdirs（）} 
 sourceSets * .resources.srcDirs * .each {it.mkdirs（）} 
} 
  

fxml_example.fxml

 <？xml version =1.0encoding =UTF -8\" >？; 
<？import java.net。*？> 
<？import javafx.geometry。*？> 
<？import javafx.scene.control。*？> 
<？import javafx.scene.layout。*？> 
<？import javafx.scene.text。*？> 
 
< GridPane fx：controller =local.hz.FXMLExampleController
 xmlns：fx =http://javafx.com/fxmlalignment =centerhgap =10 vgap =10> 
< padding>< / inset top =25right =25bottom =10left =25/>< / padding> 
< gridLinesVisible> true< / gridLinesVisible> 
 
< Text text =Welcome
 GridPane.columnIndex =0GridPane.rowIndex =0
 GridPane.columnSpan =2/> 
 
< Label text =User Name：
 GridPane.columnIndex =0GridPane.rowIndex =1/> 
 
< TextField 
 GridPane.columnIndex =1GridPane.rowIndex =1/> 
 
< Label text =Password：
 GridPane.columnIndex =0GridPane.rowIndex =2/> 
 
< PasswordField fx：id =passwordField
 GridPane.columnIndex =1GridPane.rowIndex =2/> 
 
< HBox spacing =10alignment =bottom_right
 GridPane.columnIndex =1GridPane.rowIndex =4> 
< Button text =Sign In
 onAction =＃handleSubmitButtonAction/> 
< / HBox> 
 
< Text fx：id =actiontarget
 GridPane.columnIndex =1GridPane.rowIndex =6/> 
< / GridPane> 
  

FXMLExample.java

  package local.hz; 
 
 import javafx.application.Application; 
 import javafx.fxml.FXMLLoader; 
 import javafx.scene.Parent; 
 import javafx.scene.Scene; 
 import javafx.stage.Stage; 
 public class FXMLExample extends Application {
 @Override 
 public void start（Stage stage）throws Exception {
 Parent root = FXMLLoader.load（getClass（）。getResource（fxml_example。 FXML））; 
 
场景场景=新场景（root，300,275）; 
 
 stage.setTitle（FXML WELCOME !!）; 
 stage.setScene（scene）; 
 stage.show（）; 
 
 
 public static void main（String [] arguments）{
 launch（arguments）; 
 
 
 $ / code $ / pre 
 
解决方案
 FXML文件可能没有打包到您的jar中。
 
 
 
尝试将其添加到您的build.gradle文件中： 
 
 
 sourceSets {
 main {
 resources {
 srcDirs = [src / main / java] 
 includes = [** / * .fxml] 
} 
} 
} 
  
 
I'm getting 

  
java.lang.NullPointerException: Location is required.
when I run my program after assembling using gradle with javafx plugin. If I run it from IntelliJ Idea, everything is all right. The Java source files and .fxml are locate in some package.


build.gradle
apply plugin: 'java'
apply plugin: 'application'
apply plugin: 'idea'
apply from: 'javafx.plugin'

javafx {
    javaRuntime = 'C:\\Program Files\\Java\\jdk1.7.0_45'

    appID 'FXMLExample'
    appName 'fxml example application'
    mainClass 'local.hz.FXMLExample'
}

task "create-dirs" {
    sourceSets*.java.srcDirs*.each {it.mkdirs()}
    sourceSets*.resources.srcDirs*.each {it.mkdirs()}
}
fxml_example.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import java.net.*?>
<?import javafx.geometry.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.text.*?>

<GridPane fx:controller="local.hz.FXMLExampleController"
      xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">
<padding><Insets top="25" right="25" bottom="10" left="25"/></padding>
<gridLinesVisible>true</gridLinesVisible>

<Text text="Welcome"
      GridPane.columnIndex="0" GridPane.rowIndex="0"
      GridPane.columnSpan="2"/>

<Label text="User Name:"
      GridPane.columnIndex="0" GridPane.rowIndex="1"/>

<TextField
      GridPane.columnIndex="1" GridPane.rowIndex="1"/>

<Label text="Password:"
      GridPane.columnIndex="0" GridPane.rowIndex="2"/>

<PasswordField fx:id="passwordField"
               GridPane.columnIndex="1" GridPane.rowIndex="2"/>

<HBox spacing="10" alignment="bottom_right"
      GridPane.columnIndex="1" GridPane.rowIndex="4">
    <Button text="Sign In"
            onAction="#handleSubmitButtonAction"/>
</HBox>

<Text fx:id="actiontarget"
      GridPane.columnIndex="1" GridPane.rowIndex="6"/>
</GridPane>
FXMLExample.java
package local.hz;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class FXMLExample extends Application {
@Override
public void start(Stage stage) throws Exception {
    Parent root = FXMLLoader.load(getClass().getResource("fxml_example.fxml"));

    Scene scene = new Scene(root,300,275);

    stage.setTitle("FXML WELCOME!!");
    stage.setScene(scene);
    stage.show();
}

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

解决方案
Your FXML files are probably not packaged into your jar.

Try adding this to your build.gradle file:
sourceSets {
  main {
    resources {
        srcDirs = ["src/main/java"]
        includes = ["**/*.fxml"]
    }
  }
}


                        
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