Question

我一直收到这个错误 Application start方法中的异常 java.lang.reflect.InvocationTargetException

细节

应用程序启动方法java.lang.reflect.InvocationTargetException中的异常 sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:498）at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs（LauncherImpl.java:389）在 com.sun.javafx.application.LauncherImpl.launchApplication（LauncherImpl.java:328） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:498）at sun.launcher.LauncherHelper $ FXHelper.main（LauncherHelper.java:767）引起：java.lang.RuntimeException：Application start中的异常方法 com.sun.javafx.application.LauncherImpl.launchApplication1（LauncherImpl.java:917）在 com.sun.javafx.application.LauncherImpl.lambda $ launchApplication $ 155（LauncherImpl.java:182）在java.lang.Thread.run（Thread.java:745）引起： javafx.fxml.LoadException： /C:/Users/Suleman/Documents/workspace/modeling%20and%20simulation/lab01/SIMULATIONLAB01/target/classes/dcs/rana/muhammad/suleman/SIMULATIONLAB01/test.fxml:13 在 javafx.fxml.FXMLLoader.constructLoadException（FXMLLoader.java:2601）在javafx.fxml.FXMLLoader.loadImpl（FXMLLoader.java:2579）at javafx.fxml.FXMLLoader.loadImpl（FXMLLoader.java:2441）at at javafx.fxml.FXMLLoader.loadImpl（FXMLLoader.java:3214）at at javafx.fxml.FXMLLoader.loadImpl（FXMLLoader.java:3175）at at javafx.fxml.FXMLLoader.loadImpl（FXMLLoader.java:3148）at at javafx.fxml.FXMLLoader.loadImpl（FXMLLoader.java:3124）at at javafx.fxml.FXMLLoader.loadImpl（FXMLLoader.java:3104）at at javafx.fxml.FXMLLoader.load（FXMLLoader.java:3097）at at dcs.rana.muhammad.suleman.SIMULATIONLAB01.App.start（App.java:25）at at com.sun.javafx.application.LauncherImpl.lambda $ launchApplication1 $ 162（LauncherImpl.java:863）在 com.sun.javafx.application.PlatformImpl.lambda $ runAndWait $ 175（PlatformImpl.java:326）在 com.sun.javafx.application.PlatformImpl.lambda为$ null $ 173（PlatformImpl.java:295）在java.security.AccessController.doPrivileged（Native Method）at com.sun.javafx.application.PlatformImpl.lambda $ runLater $ 174（PlatformImpl.java:294）在 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为$ null $ 148（WinApplication.java:191） ... 1更多引起：java.lang.IllegalArgumentException：无法设置 javafx.scene.control.TableColumn字段 dcs.rana.muhammad.suleman.SIMULATIONLAB01.controller.normal to javafx.scene.control.Button at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException（UnsafeFieldAccessorImpl.java:167）在 sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException（UnsafeFieldAccessorImpl.java:171）在 sun.reflect.UnsafeObjectFieldAccessorImpl.set（UnsafeObjectFieldAccessorImpl.java:81）在java.lang.reflect.Field.set（Field.java:764）at javafx.fxml.FXMLLoader.injectFields（FXMLLoader.java:1163）at at javafx.fxml.FXMLLoader.access $ 1600（FXMLLoader.java:103）at at javafx.fxml.FXMLLoader $ ValueElement.processValue（FXMLLoader.java:857）在 javafx.fxml.FXMLLoader $ ValueElement.processStartElement（FXMLLoader.java:751）在javafx.fxml.FXMLLoader.processStartElement（FXMLLoader.java:2707）在javafx.fxml.FXMLLoader.loadImpl（FXMLLoader.java:2527）... 17更多

我的代码

app.java类

public class App extends Application {

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

    @Override
    public void start(Stage primaryStage) throws Exception {
        // TODO Auto-generated method stub
        Parent root = FXMLLoader.load(getClass().getResource("test.fxml"));
        Scene scene = new Scene(root);
        primaryStage.setTitle("simple");

        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

和控制器类

public class controller {
    double quant, og, bound, sprice, cprice, trl, ds;

    @FXML
    private TextField qt;
    @FXML
    private TextField org;
    @FXML
    private TextField bd;
    @FXML
    private TextField sp;
    @FXML
    private TextField cp;
    @FXML
    private TextField tl;
    @FXML
    private TextField disc;
    @FXML
    TableColumn normal;

    public void getQT(ActionEvent e) {
        quant  =  Double.parseDouble(qt.getText());
        System.out.println(quant);

    }

    public void getOrg(ActionEvent e) {
        og  = Double.parseDouble(org.getText());
        System.out.println(og);
    }
    public void getBd(ActionEvent e) {
        bound  =  Double.parseDouble(bd.getText());
        System.out.println(bound);
    }

    public void getSP(ActionEvent e) {
        sprice  =  Double.parseDouble(sp.getText());
        System.out.println(sprice);
    }
    public void getCP(ActionEvent e) {
        cprice  =  Double.parseDouble(cp.getText());
        System.out.println(cprice);
    }
    public void getTL(ActionEvent e) {
        trl  =  Double.parseDouble(tl.getText());
        System.out.println(trl);
    }
    public void getDisc(ActionEvent e) {
        ds  =  Double.parseDouble(disc.getText());
        System.out.println(ds);
    }

    public void Random(ActionEvent e) {
        qt.setText("Clicked");
    }

    //@FXML
    public void Normal(ActionEvent e) {
        //normal.setText(value);
        N_profit();
    }


    public void N_profit() {
        //double demand, profit, trl, bound, og, quant, sprice, cprice, ds;
        double demand, profit;
        int diff;
        int[] d_arr = new int[(int) trl + 1];
        int[] p_arr = new int[(int) trl + 1];
        diff = (int) ((bound - og) / trl);

        demand = og;
        int j = 1;

        while (demand <= bound || demand < bound) {

            d_arr[j] = (int)demand;
            if (demand <= quant) {
                profit = (sprice * demand) - (cprice * quant) + (ds * sprice) * (quant - demand);
                p_arr[j] = (int) profit;
                profit = 0;
            } else {
                profit = (sprice * quant) - (cprice * quant);
                p_arr[j] = (int) profit;
                profit = 0;
            }
            demand = demand+diff;
            j++;
            if (j == trl + 1)
                break;
            //i =i+diff;
        }

        for (int z = 1; z <= trl ; z++) {
            normal.setText("demand" + d_arr[z] + "Profit" + p_arr[z] + "z" + z);
        }
    }
}

和test.fxml文件

<AnchorPane prefHeight="540.0" prefWidth="593.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="dcs.rana.muhammad.suleman.SIMULATIONLAB01.controller">
   <children>
      <Button fx:id="normal" layoutX="70.0" layoutY="213.0" mnemonicParsing="false" onAction="#Normal" prefHeight="25.0" prefWidth="99.0" text="Normal" />
      <Label layoutX="14.0" layoutY="21.0" prefHeight="25.0" prefWidth="56.0" text="Quantity" />
      <TextField fx:id="qt" layoutX="89.0" layoutY="21.0" onAction="#getQT" prefHeight="25.0" prefWidth="121.0" />
      <Label layoutX="14.0" layoutY="63.0" text="Selling Price" />
      <Label layoutX="244.0" layoutY="106.0" text="Random number Bound" />
      <Label layoutX="16.0" layoutY="106.0" text="Cost Price" />
      <Label layoutX="244.0" layoutY="22.0" text="Trials" />
      <TextField fx:id="sp" layoutX="89.0" layoutY="60.0" onAction="#getSP" prefHeight="25.0" prefWidth="121.0" />
      <TextField fx:id="bd" layoutX="389.0" layoutY="102.0" onAction="#getBd" prefHeight="25.0" prefWidth="121.0" />
      <TextField fx:id="cp" layoutX="89.0" layoutY="102.0" onAction="#getCP" prefHeight="25.0" prefWidth="121.0" />
      <TextField fx:id="tl" layoutX="288.0" layoutY="18.0" onAction="#getTL" prefHeight="25.0" prefWidth="121.0" />
      <ScrollPane layoutX="3.0" layoutY="328.0" prefHeight="198.0" prefWidth="587.0">
        <content>
          <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="200.0" prefWidth="200.0">
               <children>
                  <TableView fx:id="mymsg" layoutX="-4.0" prefHeight="200.0" prefWidth="208.0">
                    <columns>
                      <TableColumn prefWidth="75.0" text="Demand" />
                      <TableColumn prefWidth="75.0" text="Profit" />
                        <TableColumn prefWidth="75.0" />
                    </columns>
                     <effect>
                        <Glow />
                     </effect>
                  </TableView>
               </children>
            </AnchorPane>
        </content>
      </ScrollPane>
      <Label layoutX="242.0" layoutY="63.0" text="Random number origin" />
      <TextField fx:id="org" layoutX="389.0" layoutY="59.0" onAction="#getOrg" prefHeight="25.0" prefWidth="121.0" />
      <Label layoutX="219.0" layoutY="179.0" prefHeight="34.0" prefWidth="156.0" text="          Distributions">
         <font>
            <Font name="Arial Bold" size="12.0" />
         </font>
      </Label>
      <Button layoutX="389.0" layoutY="213.0" mnemonicParsing="false" onAction="#Random" prefHeight="25.0" prefWidth="99.0" text="Random" />
      <Label layoutX="19.0" layoutY="146.0" text="Discount" />
      <TextField fx:id="disc" layoutX="89.0" layoutY="142.0" onAction="#getDisc" prefHeight="25.0" prefWidth="121.0" />
   </children>
</AnchorPane>

请有人解释可以做什么

Answer 1

在你的FXML中，你有

let def = NSUserDefaults.standardUserDefaults()
let current = def.integerForKey("version")
print("Current version is \(current)")

并且在您的控制器中，您有

<Button fx:id="normal" layoutX="70.0" layoutY="213.0" mnemonicParsing="false" onAction="#Normal" prefHeight="25.0" prefWidth="99.0" text="Normal" />

所以错误信息毫不奇怪地说：

无法将@FXML TableColumn normal;字段javafx.scene.control.TableColumn设置为dcs.rana.muhammad.suleman.SIMULATIONLAB01.controller.normal

应用程序启动方法中的异常javafx gui

1 个答案: