为什么我的bin目录没有充满.class文件？

编程问答 2022-06-11

问题描述

我正在练习Java，我注意到在我的较旧项目中，我的bin目录中包含“ something.java”文件的“镜像”。但是现在不管我做什么，它们似乎都没有出现。这是个问题吗？如果是，我该如何解决？ 我的应用程序是gui应用程序。 我的pom.xml看起来像这样。

     <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0</modelVersion>
      <groupId>KisallatNyilvantartoRendszer</groupId>
      <artifactId>KisallatNyilvantartoRendszer</artifactId>
      <version>0.0.1-SNAPSHOT</version>
       <properties>
            <java.version>1.8</java.version>
            <maven.compiler.source>1.8</maven.compiler.source>
            <maven.compiler.target>1.8</maven.compiler.target>
            <org.springframework.version>5.2.5.RELEASE</org.springframework.version>
        </properties>
    <dependencies>
                <dependency>
            <groupId>MysqL</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.19</version>
        </dependency>
    </dependencies>
  <build>
       <sourceDirectory>src</sourceDirectory>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.0</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

项目说找不到ViewController类，所以我用以下方法解决了它：

  fx:controller="KisallatNyilvantartoRendszer.view.ViewController"

但是现在它引发了以下问题：

 Exception in Application start method
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(UnkNown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(UnkNown Source)
    at java.lang.reflect.Method.invoke(UnkNown Source)
    at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
    at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(UnkNown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(UnkNown Source)
    at java.lang.reflect.Method.invoke(UnkNown Source)
    at sun.launcher.LauncherHelper$FXHelper.main(UnkNown Source)
Caused by: java.lang.RuntimeException: Exception in Application start method
    at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$1(LauncherImpl.java:182)
    at java.lang.Thread.run(UnkNown Source)
Caused by: javafx.fxml.LoadException: 
/C:/Users/M%c3%a1t%c3%a9/Desktop/Workspace/KisallatNyilvantartoRendszer/target/classes/KisallatNyilvantartoRendszer/allatok.fxml:16

    at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2579)
    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 KisallatNyilvantartoRendszer.Main.start(Main.java:18)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$8(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$7(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$5(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$6(PlatformImpl.java:294)
    at com.sun.glass.ui.invokelaterdispatcher$Future.run(invokelaterdispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$4(WinApplication.java:186)
    ... 1 more
Caused by: java.lang.IllegalArgumentException: Can not set javafx.scene.control.TableView field KisallatNyilvantartoRendszer.view.ViewController.allatView to javafx.scene.control.TableColumn
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnkNown Source)
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnkNown Source)
    at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnkNown Source)
    at java.lang.reflect.Field.set(UnkNown Source)
    at javafx.fxml.FXMLLoader.injectFields(FXMLLoader.java:1163)
    at javafx.fxml.FXMLLoader.access$1600(FXMLLoader.java:103)
    at javafx.fxml.FXMLLoader$ValueElement.processValue(FXMLLoader.java:857)
    at javafx.fxml.FXMLLoader$ValueElement.processstartElement(FXMLLoader.java:751)
    at javafx.fxml.FXMLLoader.processstartElement(FXMLLoader.java:2707)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2527)
    ... 17 more
Exception running application KisallatNyilvantartoRendszer.Main

我还认为我的工作区混乱了，原因是在bin / target文件夹中未创建.class文件。这是个问题吗？我该如何运作？

解决方法

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