在StackPane内部加载GridPanes时的JavaFX LoadException初始化

时间:2016-03-25 16:13:09

标签: java javafx

正如快速解释一样,我只是想设置一个包含两个GridPane的StackPane,一个在彼此之上。正如你可以从类名中判断出我正在尝试制作一款策略游戏,我希望有一个作为背景环境的GridPane,然后是一个存储播放器单元的GridPane。捕获所有点击事件。

我已经让StackPane加载没有问题,但后来我尝试在StackPane的initialize函数中加载环境GridPane和单元GridPane,并且我不断从中获取LoadException。我用路径尝试了一些不同的东西,但没有改变任何东西。

这是我目前所处的位置:

Main.java

package application;

import java.io.IOException;

import javafx.application.Application; 
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;


public class Main extends Application {
  @Override
  public void start(Stage primaryStage) {

    try {
        StackPane root = FXMLLoader.load(getClass().getResource("/application/battleGrid/BattleGrid.fxml"));
        primaryStage.setScene(new Scene(root, 700, 700));
        primaryStage.show();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

  }

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

BattleGridController.java     package application.battleGrid;

import java.io.IOException;

import application.Main;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.LoadException;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.StackPane;

public class BattleGridController {

@FXML
private StackPane stack;

  public void initialize() {
    try {
        GridPane environmentGrid = FXMLLoader.load(Main.class.getResource("/application/environmentGrid/EnvironmentGrid.fxml"));
        GridPane unitGrid = FXMLLoader.load(Main.class.getResource("/application/unitGrid/UnitGrid.fxml"));
        stack.getChildren().addAll(environmentGrid, unitGrid);
    } catch (LoadException e) {
        e.printStackTrace();
        System.out.println(e.getMessage());
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
  }
}

BattleGrid.fxml

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

<?import javafx.scene.layout.StackPane?>

<StackPane xmlns:fx="http://javafx.com/fxml/1"
        fx:controller="application.battleGrid.BattleGridController">
  <!-- TODO Add Nodes -->
</StackPane>

UnitGrid.fxml

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

<?import javafx.scene.layout.GridPane?>

<GridPane xmlns:fx="http://javafx.com/fxml/1"
        fx:controller="application.unitGrid.UnitGridController">

</GridPane>

EnvironmentGrid.fxml     

<?import javafx.scene.layout.GridPane?>

<GridPane xmlns:fx="http://javafx.com/fxml/1"
        fx:controller="application.environmentGrid.EnvironmentGridController"
        gridLinesVisible="true">

</GridPane>

控制器中目前没有任何环境和单元网格,所以那里应该没有问题。

这是堆栈跟踪:

javafx.fxml.LoadException: 
/Users/markbluemer/Documents/workspace2/GridPanePractice/bin/application/battleGrid/BattleGrid.fxml

at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2571)
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 application.Main.start(Main.java:17)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$163(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$176(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$174(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$175(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)

Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2566)
... 14 more

Caused by: java.lang.NullPointerException: Location is required.
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3207)
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 application.battleGrid.BattleGridController.initialize(BattleGridController.java:19)
... 25 more

一般项目结构:

  • SRC
    • 应用
      • Main.java
      • battleGrid
        • BattleGridController.java
        • BattleGrid.fxml
      • environmentGrid
        • EnvironmentGridController.java
        • EnvironmentGrid.fxml
      • unitGrid
        • UnitGridController.java
        • UnitGrid.fxml

编辑:

更改

FXMLLoader.load(Main.class.getResource("/application/unitGrid/unitGrid.fxml"));

FXMLLoader.load(Main.class.getResource("/application/unitGrid/UnitGrid.fxml"));

同样的问题仍然存在

2 个答案:

答案 0 :(得分:0)

您的代码正在加载此内容:

Main.class.getResource("/application/unitGrid/unitGrid.fxml")

但是你说它的名字有一个大写的情况&#34; U&#34;

UnitGrid.fxml

尝试更改为区分大小写的加载。

答案 1 :(得分:0)

堆栈跟踪指示未设置位置。这意味着FXMLLoader找不到资源路径。正如咕噜咕噜的鸽子所做的那样,做出了这些改变。

<强>更新

要加载资源,请使用CurrentThread,

Thread.currentThread().getContextClassLoader().getResource("fxml_file_path")