问题
I'm developing a "random enemy generator" for a friends D&D board and since I'm practing Java I wanted to try out. I want it to have 2 anchor panels:
In the first one you give value to the following attributes of the object Foes:
- Nombre (name)
- HP
- Energia(Energy)
- Mana
Once done, you save those selections and the enemies get included in the generator.
- You generate the random enemy, with his values and scalating according to your character level.
My question is, how I can get from the first to the second? I have pretty clear how to develop both individually but not how to mix them.
I just have the code for the second one because, initially I didn't think about customizing it. I don't think any of the code regarding this screen is relevant but if u want it just tell me!
edit: I tried by my own and I managed everything to create 2 fxml files and set the controllers but I'm getting the following error when I push my button to switch between panels:
Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1774)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1657)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Node.fireEvent(Node.java:8411)
at javafx.scene.control.Button.fire(Button.java:185)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:394)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$345(GlassViewEventHandler.java:432)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:431)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
at com.sun.glass.ui.gtk.GtkApplication.lambda$null$203(GtkApplication.java:139)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1769)
... 48 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 com.croma.generadordd.FXMLcontroller.loadSecond(FXMLcontroller.java:34)
... 58 more
This is my code:
FXMLcontroller.java
public class FXMLcontroller implements Initializable {
@FXML
AnchorPane rootPanel;
Button pase;
@Override
public void initialize(URL url, ResourceBundle rb) {
}
@FXML
private void loadSecond (ActionEvent event) throws IOException{
AnchorPane pane = FXMLLoader.load(getClass().getClassLoader().getResource("Scene.fxml"));
rootPanel.getChildren().setAll(pane);
}
}
MainApp.java
import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class MainApp extends Application {
public MainApp() {
}
@Override
public void start(Stage stage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("/fxml/SelectScreen.fxml"));
Scene scene = new Scene(root);
scene.getStylesheets().add("/styles/Styles.css");
stage.setTitle("JavaFX and Maven");
stage.setScene(scene);
stage.show();
}
/**
* The main() method is ignored in correctly deployed JavaFX application.
* main() serves only as fallback in case the application can not be
* launched through deployment artifacts, e.g., in IDEs with limited FX
* support. NetBeans ignores main().
*
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
secondScreen.java
import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Label;
import java.util.Random;
import javafx.fxml.FXMLLoader;
import javafx.scene.control.TextArea;
import javafx.scene.layout.AnchorPane;
public class secondScreen implements Initializable {
Random aleat = new Random();
int monstruo = aleat.nextInt(10);
int numeroEnemigos = aleat.nextInt(4) + 1;
//1. //6.
//2. //7.
//3. //8.
//4. //9.
//5. //10.
@FXML
private void handleButtonAction(ActionEvent event) {
Random aleat = new Random();
final int monstruo = aleat.nextInt(10);
int numeroEnemigos = aleat.nextInt(4) + 1;
Foes enemigo0 = new Foes("Enemigo0", 0, 0, 0);
switch(monstruo){
case 0: resultado.setText("Aparece(n)" + "\t" + numeroEnemigos + "\t" +
"\t"+ enemigo0.Nombre+ ",\t" + "\t" +"preparate a luchar!");
break;
case 1: resultado.setText("Aparece(n)" + "\t" + numeroEnemigos + "\t" +
"monstruo(s)2, preparate a luchar!");
break;
case 2: resultado.setText("Aparece(n)" + "\t" + numeroEnemigos + "\t" +
"monstruo(s)3, preparate a luchar!");
break;
case 3: resultado.setText("Aparece(n)" + "\t" + numeroEnemigos + "\t" +
"monstruo(s)4, preparate a luchar!");
break;
case 4: resultado.setText("Aparece(n)" + "\t" + numeroEnemigos + "\t" +
"monstruo(s)5, preparate a luchar!");
break;
case 5: resultado.setText("Aparece(n)" + "\t" + numeroEnemigos + "\t" +
"monstruo(s)6, preparate a luchar!");
break;
case 6: resultado.setText("Aparece(n)" + "\t" + numeroEnemigos + "\t" +
"monstruo(s)7, preparate a luchar!");
break;
case 7: resultado.setText("Aparece(n)" + "\t" + numeroEnemigos + "\t" +
"monstruo(s)8, preparate a luchar!");
break;
case 8: resultado.setText("Aparece(n)" + "\t" + numeroEnemigos + "\t" +
"monstruo(s)9, preparate a luchar!");
break;
case 9: resultado.setText("Aparece(n)" + "\t" + numeroEnemigos + "\t" +
"monstruo(s)10, preparate a luchar!");
break;
}
//RELLENAR CON DATOS DE ENEMIGOS
switch(monstruo){
case 0: inste.setText(String.valueOf("Nombre:" +" "+enemigo0.Nombre+"\n"+"Vida:"+
" "+enemigo0.Hp+"\n"+"Energía:"+" "+enemigo0.E+"\n"+"Maná:"+" "+enemigo0.M));
break;
}
//"Las stats del enemigo son (Hp/energía/maná"+
// "\t" +
}
@FXML
Label resultado;
@FXML
Label inste;
@Override
public void initialize(URL url, ResourceBundle rb) {
}
}
Scene.FXML controller by secondScreen.java
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.text.*?>
<?import javafx.scene.image.*?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" prefHeight="469.0" prefWidth="484.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.croma.generadordd.secondScreen">
<children>
<Button fx:id="button" layoutX="14.0" layoutY="392.0" onAction="#handleButtonAction" prefHeight="38.0" prefWidth="301.0" text="Genera un enemigo" />
<Label fx:id="resultado" layoutX="11.0" layoutY="344.0" prefHeight="38.0" prefWidth="462.0" />
<ImageView fitHeight="379.0" fitWidth="469.0" layoutX="8.0" layoutY="8.0" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="@Dungeons-and-Dragons-characters.jpg" />
</image>
</ImageView>
<TextField layoutX="405.0" layoutY="399.0" prefHeight="0.0" prefWidth="24.0" />
<Text layoutX="373.0" layoutY="416.0" strokeType="OUTSIDE" strokeWidth="0.0" text="Nv." />
<Label fx:id="inste" layoutX="7.0" layoutY="275.0" prefHeight="62.0" prefWidth="469.0" />
</children>
</AnchorPane>
SelectScreen.FXML controlled by FXMLcontroller.java
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.text.*?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" fx:id="rootPanel" prefHeight="469.0" prefWidth="484.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.croma.generadordd.FXMLcontroller">
<children>
<TextField layoutX="14.0" layoutY="69.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="14.0" layoutY="106.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="133.0" layoutY="69.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="133.0" layoutY="106.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="251.0" layoutY="106.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="251.0" layoutY="69.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="370.0" layoutY="69.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="370.0" layoutY="106.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="14.0" layoutY="146.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="133.0" layoutY="146.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="251.0" layoutY="146.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="370.0" layoutY="146.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="133.0" layoutY="187.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="14.0" layoutY="187.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="251.0" layoutY="187.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="370.0" layoutY="187.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="14.0" layoutY="228.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="133.0" layoutY="228.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="251.0" layoutY="228.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="370.0" layoutY="228.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="14.0" layoutY="268.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="133.0" layoutY="268.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="251.0" layoutY="268.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="370.0" layoutY="268.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="14.0" layoutY="308.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="133.0" layoutY="308.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="251.0" layoutY="308.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="370.0" layoutY="308.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="14.0" layoutY="344.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="133.0" layoutY="344.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="251.0" layoutY="344.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="370.0" layoutY="344.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="14.0" layoutY="381.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="133.0" layoutY="381.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="251.0" layoutY="381.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="369.0" layoutY="381.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="14.0" layoutY="419.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="133.0" layoutY="419.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="251.0" layoutY="419.0" prefHeight="25.0" prefWidth="101.0" />
<TextField layoutX="369.0" layoutY="419.0" prefHeight="25.0" prefWidth="101.0" />
<Label layoutX="-2.0" prefHeight="41.0" prefWidth="336.0" text=" D&D GENERATOR 1.0" textAlignment="CENTER">
<font>
<Font size="30.0" />
</font>
</Label>
<Label layoutX="383.0" layoutY="448.0" prefHeight="15.0" prefWidth="88.0" text="Coded by CRoma">
<font>
<Font size="10.0" />
</font>
</Label>
<Label layoutX="9.0" layoutY="44.0" text="Nombre enemigo" />
<Label layoutX="175.0" layoutY="44.0" text="HP" />
<Label layoutX="277.0" layoutY="44.0" text="Energía" />
<Label layoutX="403.0" layoutY="44.0" text="Maná" />
<Button fx:id="pase" layoutX="363.0" layoutY="5.0" mnemonicParsing="false" onAction="#loadSecond" prefHeight="34.0" prefWidth="113.0" text="JUEGA!" />
</children>
</AnchorPane>
回答1:
The following code demonstrates how to switch between two panes.
It is also mcve which you can use as a reference for future questions(1).
import java.io.IOException;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class SwitchPanesDemo extends Application
{
private Pane page0, page1;
private Button toggle;
String[] buttonText = {"Show Page 1", "Show Page 2"};
@Override
public void start(Stage primaryStage) {
try {
page0 = (Pane) FXMLLoader.load(getClass().getResource("redPane.fxml"));
page1 = (Pane) FXMLLoader.load(getClass().getResource("yellowPane.fxml"));
page0.visibleProperty().bind(page1.visibleProperty().not());//make sure only one pane is visible
page1.setVisible(false);
StackPane stackPane = new StackPane(page0, page1);//add both panes to a stack pane
BorderPane root = new BorderPane(stackPane);
toggle = new Button(buttonText[0]);
toggle.setOnAction(e->togglePages(toggle.getText()));
root.setBottom(toggle);
Scene scene = new Scene(root);
primaryStage.setScene(scene);
primaryStage.show();
}
catch (IOException e) {
e.printStackTrace();
}
}
private void togglePages(String text) {
if(buttonText[0].equals(text)){
page1.setVisible(true);
toggle.setText(buttonText[1]);
}else{
page1.setVisible(false);
toggle.setText(buttonText[0]);
}
}
public static void main(String[] args) {
launch(args);
}
}
redPane.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity"
prefHeight="200.0" prefWidth="300.0" style="-fx-background-color: red;"
xmlns="http://javafx.com/javafx/10.0.1" xmlns:fx="http://javafx.com/fxml/1">
<children>
<Label layoutX="87.0" layoutY="87.0" text="Red AnchorePane" textAlignment="CENTER" textFill="#faf907">
<font>
<Font size="16.0" />
</font>
</Label>
</children>
</AnchorPane>
yellowPane.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity"
prefHeight="200.0" prefWidth="300.0" style="-fx-background-color: yellow;"
xmlns="http://javafx.com/javafx/10.0.1" xmlns:fx="http://javafx.com/fxml/1">
<children>
<Label layoutX="87.0" layoutY="87.0" text="Yellow AnchorePane" textAlignment="CENTER" textFill="#fa1b07">
<font>
<Font size="16.0" />
</font>
</Label>
</children>
</AnchorPane>
(1) SO policy is:
"Questions seeking debugging help ("why isn't this code working?") must include the desired behavior, a specific problem or error and the shortest code necessary to reproduce it in the question itself..."
来源：https://stackoverflow.com/questions/56926885/javafx-switching-between-two-panes