我是Java新手，无法正常使用Connect4的gui。因此，我想添加光盘，但无法告诉程序如何区分行和列。 如果我制作光盘类并仅添加光盘，它将放在第一行[0]。如果我列出放置矩形（列）的位置，它只会拉出==> 我真的不知道该怎么办。
错误：子代：添加了重复的子代：父=网格
如何添加鼠标事件，以便我的应用程序知道我单击了哪一列并将光盘放入其中？
使用场景构建器制作的fxml类：
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.Cursor?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.Pane?>
<?import javafx.scene.layout.RowConstraints?>
<?import javafx.scene.shape.Circle?>
<?import javafx.scene.shape.Rectangle?>
<?import javafx.scene.text.Font?>
<Pane fx:id="discRoot" prefHeight="350.0" prefWidth="350.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">
<children>
<GridPane fx:id="gridPane" gridLinesVisible="true" layoutY="50.0" prefHeight="300.0" prefWidth="350.0" style="-fx-background-color: thistle;">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.halignment="CENTER" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="2" GridPane.halignment="CENTER" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="3" GridPane.halignment="CENTER" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="4" GridPane.halignment="CENTER" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="3" GridPane.halignment="CENTER" GridPane.rowIndex="1" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="6" GridPane.halignment="CENTER" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.halignment="CENTER" GridPane.rowIndex="1" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.rowIndex="1" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="2" GridPane.halignment="CENTER" GridPane.rowIndex="1" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="5" GridPane.halignment="CENTER" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="4" GridPane.halignment="CENTER" GridPane.rowIndex="1" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="5" GridPane.halignment="CENTER" GridPane.rowIndex="1" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="6" GridPane.halignment="CENTER" GridPane.rowIndex="1" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.halignment="CENTER" GridPane.rowIndex="2" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.rowIndex="2" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="2" GridPane.halignment="CENTER" GridPane.rowIndex="2" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="4" GridPane.halignment="CENTER" GridPane.rowIndex="3" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="4" GridPane.halignment="CENTER" GridPane.rowIndex="2" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="5" GridPane.halignment="CENTER" GridPane.rowIndex="2" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="6" GridPane.halignment="CENTER" GridPane.rowIndex="2" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.halignment="CENTER" GridPane.rowIndex="3" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.rowIndex="3" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="2" GridPane.halignment="CENTER" GridPane.rowIndex="3" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="3" GridPane.halignment="CENTER" GridPane.rowIndex="3" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.halignment="CENTER" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="3" GridPane.halignment="CENTER" GridPane.rowIndex="2" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="5" GridPane.halignment="CENTER" GridPane.rowIndex="3" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="6" GridPane.halignment="CENTER" GridPane.rowIndex="3" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.halignment="CENTER" GridPane.rowIndex="4" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.rowIndex="4" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="3" GridPane.halignment="CENTER" GridPane.rowIndex="4" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="2" GridPane.halignment="CENTER" GridPane.rowIndex="4" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="4" GridPane.halignment="CENTER" GridPane.rowIndex="4" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="5" GridPane.halignment="CENTER" GridPane.rowIndex="4" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="6" GridPane.halignment="CENTER" GridPane.rowIndex="4" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.halignment="CENTER" GridPane.rowIndex="5" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.rowIndex="5" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="2" GridPane.halignment="CENTER" GridPane.rowIndex="5" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="3" GridPane.halignment="CENTER" GridPane.rowIndex="5" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="4" GridPane.halignment="CENTER" GridPane.rowIndex="5" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="5" GridPane.halignment="CENTER" GridPane.rowIndex="5" GridPane.valignment="CENTER" />
<Circle fill="WHITE" radius="23.0" stroke="BLACK" strokeLineCap="ROUND" strokeType="INSIDE" strokeWidth="2.0" GridPane.columnIndex="6" GridPane.halignment="CENTER" GridPane.rowIndex="5" GridPane.valignment="CENTER" />
<Rectangle fx:id="rect" arcHeight="5.0" arcWidth="5.0" fill="THISTLE" height="300.0" onMouseClicked="#setDiscOnClick" onMouseEntered="#setRectangleOnMenter" onMouseExited="#setRectangleOnMexit" opacity="0.1" stroke="BLACK" strokeType="INSIDE" width="50.0" GridPane.valignment="TOP">
<cursor>
<Cursor fx:constant="CROSSHAIR" />
</cursor>
</Rectangle>
<Rectangle fx:id="rect1" arcHeight="5.0" arcWidth="5.0" fill="THISTLE" height="300.0" onMouseEntered="#setRectangleOnMenter1" onMouseExited="#setRectangleOnMexit1" opacity="0.1" stroke="BLACK" strokeType="INSIDE" width="50.0" GridPane.columnIndex="1" GridPane.valignment="TOP">
<cursor>
<Cursor fx:constant="CROSSHAIR" />
</cursor>
</Rectangle>
<Rectangle fx:id="rect2" arcHeight="5.0" arcWidth="5.0" fill="THISTLE" height="300.0" onMouseEntered="#setRectangleOnMenter2" onMouseExited="#setRectangleOnMexit2" opacity="0.1" stroke="BLACK" strokeType="INSIDE" width="50.0" GridPane.columnIndex="2" GridPane.valignment="TOP">
<cursor>
<Cursor fx:constant="CROSSHAIR" />
</cursor>
</Rectangle>
<Rectangle fx:id="rect3" arcHeight="5.0" arcWidth="5.0" fill="THISTLE" height="300.0" onMouseEntered="#setRectangleOnMenter3" onMouseExited="#setRectangleOnMexit3" opacity="0.1" stroke="BLACK" strokeType="INSIDE" width="50.0" GridPane.columnIndex="3" GridPane.valignment="TOP">
<cursor>
<Cursor fx:constant="CROSSHAIR" />
</cursor>
</Rectangle>
<Rectangle fx:id="rect4" arcHeight="5.0" arcWidth="5.0" fill="THISTLE" height="300.0" onMouseEntered="#setRectangleOnMenter4" onMouseExited="#setRectangleOnMexit4" opacity="0.1" stroke="BLACK" strokeType="INSIDE" width="50.0" GridPane.columnIndex="4" GridPane.valignment="TOP">
<cursor>
<Cursor fx:constant="CROSSHAIR" />
</cursor>
</Rectangle>
<Rectangle fx:id="rect5" arcHeight="5.0" arcWidth="5.0" fill="THISTLE" height="300.0" onMouseEntered="#setRectangleOnMenter5" onMouseExited="#setRectangleOnMexit5" opacity="0.1" stroke="BLACK" strokeType="INSIDE" width="50.0" GridPane.columnIndex="5" GridPane.valignment="TOP">
<cursor>
<Cursor fx:constant="CROSSHAIR" />
</cursor>
</Rectangle>
<Rectangle fx:id="rect6" arcHeight="5.0" arcWidth="5.0" fill="THISTLE" height="300.0" onMouseEntered="#setRectangleOnMenter6" onMouseExited="#setRectangleOnMexit6" opacity="0.1" stroke="BLACK" strokeType="INSIDE" width="50.0" GridPane.columnIndex="6" GridPane.valignment="TOP">
<cursor>
<Cursor fx:constant="CROSSHAIR" />
</cursor>
</Rectangle>
</children>
</GridPane>
<HBox prefHeight="25.0" prefWidth="350.0" style="-fx-background-color: lightsteelblue;">
<children>
<Label alignment="CENTER" prefHeight="25.0" prefWidth="100.0" text="Broj poteza crvenog:">
<font>
<Font size="11.0" />
</font>
</Label>
<Label alignment="CENTER" prefHeight="150.0" prefWidth="150.0" text="Na potezu:" textAlignment="CENTER">
<font>
<Font size="11.0" />
</font>
</Label>
<Label alignment="CENTER" prefHeight="25.0" prefWidth="100.0" text="Broj poteza žutog:" textAlignment="CENTER">
<font>
<Font size="11.0" />
</font>
</Label>
</children>
</HBox>
<HBox layoutY="25.0" prefHeight="25.0" prefWidth="350.0" style="-fx-background-color: lightsteelblue;">
<children>
<Label alignment="CENTER" prefHeight="100.0" prefWidth="100.0" text="Label">
<font>
<Font size="11.0" />
</font>
<HBox.margin>
<Insets left="-1.0" />
</HBox.margin>
</Label>
<Label alignment="CENTER" prefHeight="150.0" prefWidth="150.0" text="Label">
<font>
<Font size="11.0" />
</font>
</Label>
<Label alignment="CENTER" prefHeight="25.0" prefWidth="100.0" text="Label">
<font>
<Font size="11.0" />
</font>
</Label>
</children>
</HBox>
</children>
</Pane>
这是我的控制器类：
package sample;
import javafx.animation.TranslateTransition;
import javafx.fxml.FXML;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Rectangle;
import javafx.scene.shape.Shape;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
public class Controller {
private static final int COLUMNS = 7;
private static final int ROWS = 6;
private static final int TILE_SIZE = 50;
private boolean redMove = true;
@FXML
Rectangle rect = new Rectangle();
@FXML
Rectangle rect1 = new Rectangle();
@FXML
Rectangle rect2 = new Rectangle();
@FXML
Rectangle rect3 = new Rectangle();
@FXML
Rectangle rect4 = new Rectangle();
@FXML
Rectangle rect5 = new Rectangle();
@FXML
Rectangle rect6 = new Rectangle();
@FXML
GridPane gridPane = new GridPane();
@FXML
private Pane discRoot = new Pane();
@FXML
public void setDiscOnClick() {
System.out.println(gridPane.getChildren().add(new Disc(redMove)));
}
@FXML
public void setRectangleOnMenter() {
rect.setFill(Color.AQUA);
}
@FXML
public void setRectangleOnMexit() {
rect.setFill(Color.THISTLE);
}
@FXML
public void setRectangleOnMenter1() {
rect1.setFill(Color.AQUA);
}
@FXML
public void setRectangleOnMexit1() {
rect1.setFill(Color.THISTLE);
}
@FXML
public void setRectangleOnMenter2() {
rect2.setFill(Color.AQUA);
}
@FXML
public void setRectangleOnMexit2() {
rect2.setFill(Color.THISTLE);
}
@FXML
public void setRectangleOnMenter3() {
rect3.setFill(Color.AQUA);
}
@FXML
public void setRectangleOnMexit3() {
rect3.setFill(Color.THISTLE);
}
public void setRectangleOnMenter4() {
rect4.setFill(Color.AQUA);
}
public void setRectangleOnMexit4() {
rect4.setFill(Color.THISTLE);
}
public void setRectangleOnMenter5() {
rect5.setFill(Color.AQUA);
}
public void setRectangleOnMexit5() {
rect5.setFill(Color.THISTLE);
}
public void setRectangleOnMenter6() {
rect6.setFill(Color.AQUA);
}
public void setRectangleOnMexit6() {
rect6.setFill(Color.THISTLE);
}
我的主要班级：
package sample;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class Main extends Application {
@Override
public void start(Stage primaryStage) throws Exception{
Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
primaryStage.setTitle("Connect4");
primaryStage.setScene(new Scene(root));
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}