我遇到第112/113/114行的问题，程序将在没有它们的情况下编译， 我试图从（ObservableList数据库）获取数据并将其显示在表上，我尝试将变量保持为date，double。将它们更改为SimpleDoubleProperty，SimpleObjectProperty。
这是我得到的例外
at com.sun.glass.ui.win.WinApplication.lambda$null$145(Unknown
Source) at
com.sun.glass.ui.win.WinApplication$$Lambda$36/2117255219.run(Unknown
Source) ... 1 more Caused by: java.lang.NullPointerException at
org.xcellcomm.Controller.initialize(Controller.java:103) ... 23 more
Exception running application org.xcellcomm.Start
package org.xcellcomm;
import java.net.URL;
import java.util.ArrayList;
import java.util.Date;
import java.util.ResourceBundle;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.RadioButton;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.ToggleGroup;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.control.Button;
import javafx.scene.control.CheckBox;
import javafx.scene.control.TextField;
public class Controller implements Initializable {
private final ObservableList<Mrc> data =
FXCollections.observableArrayList();
Date date;
ArrayList<Mrc> dailyMRC;
final static int VALUEBUNDLE = 5;
final static int PHP = 6;
final static int BLOCKIT = 1;
final static int RHAPSODY = 10;
final static int WORLDCALLING = 5;
final static int LOOKOUT = 3;
@FXML
private CheckBox checkboxFeatureLookout;
@FXML
private RadioButton plan40Radio;
@FXML
private CheckBox checkboxBlockIt;
@FXML
private CheckBox checkboxFeatureValueBundle;
@FXML
private TextField textfeildTodayGoal;
@FXML
private Button buttonAddActivation;
@FXML
private CheckBox checkboxFeatureRhpsody;
@FXML
private CheckBox checkboxFeatureWorldCalling;
@FXML
private RadioButton plan50Radio;
@FXML
private CheckBox checkboxFeaturePhp;
@FXML
private RadioButton plan60Radio;
@FXML
private TextField textfeildTodayActivations;
@FXML
private TableView<Plana> dailyActivationTable;
@FXML
private TableColumn<Plana, Date> dailyActivationTimeColon;
@FXML
private TableColumn<Plana, Double> dailyActivationPlanColon;
private final ObservableList<Plana> database =
FXCollections.observableArrayList();
@Override
public void initialize(URL location, ResourceBundle resources) {
dailyActivationPlanColon = new TableColumn<Controller.Plana, Double>();
dailyActivationTimeColon = new TableColumn<Controller.Plana, Date>();
dailyActivationTable.getColumns().addAll(dailyActivationPlanColon,dailyActivationTimeColon);
dailyMRC = new ArrayList<>();
ToggleGroup group = new ToggleGroup();
plan40Radio.setToggleGroup(group);
plan50Radio.setToggleGroup(group);
plan60Radio.setToggleGroup(group);
dailyActivationPlanColon.setCellValueFactory(new PropertyValueFactory<Plana, Double>("PlanProperty"));
dailyActivationTimeColon.setCellValueFactory(new PropertyValueFactory<Plana,Date>("dateProperty"));
dailyActivationTable.setItems(database);
}
//Getting input from the GUI and Calculate the MRC Constructor
private int newActivationCalculater(){
int mrc=0;
if(plan40Radio.isSelected())mrc=+40;
if(plan50Radio.isSelected())mrc=+50;
if(plan60Radio.isSelected())mrc=+60;
if(checkboxBlockIt.isSelected())mrc=+BLOCKIT;
if(checkboxFeatureLookout.isSelected())mrc=+LOOKOUT;
if(checkboxFeaturePhp.isSelected())mrc=+PHP;
if(checkboxFeatureRhpsody.isSelected())mrc=+RHAPSODY;
if(checkboxFeatureValueBundle.isSelected())mrc=+VALUEBUNDLE;
if(checkboxFeatureWorldCalling.isSelected())mrc=+WORLDCALLING;
return mrc;
}
//Getting the Current time for the mrc constructor
private Date currentTime(){
Date date = new Date();
return date;
}
public void buttonAddActivationPressed(){
if(plan40Radio.isSelected()||plan50Radio.isSelected()||plan60Radio.isSelected()){
double mrc = (double)newActivationCalculater();
Date date = currentTime();
//Mrc newactivation = ;
unselectAllItem();
database.add(new Plana((int)mrc, date));
todayactivationRefresh();
}//if end
else{//if user did not select plan
Alert alert = new Alert(AlertType.WARNING);
alert.setTitle("Warning!");
alert.setHeaderText("Something wrong:)");
alert.setContentText("You didn't select a Plan");
alert.showAndWait();}
}
void todayactivationRefresh(){
String todayactivation=dailyMRC.size()+"";
textfeildTodayActivations.setText(todayactivation);
}
void unselectAllItem(){
plan40Radio.setSelected(false);
plan50Radio.setSelected(false);
plan60Radio.setSelected(false);
checkboxBlockIt.setSelected(false);
checkboxFeatureLookout.setSelected(false);
checkboxFeaturePhp.setSelected(false);
checkboxFeatureValueBundle.setSelected(false);
checkboxFeatureWorldCalling.setSelected(false);
checkboxFeatureRhpsody.setSelected(false);
}
public class Plana {// its might not work because it is it's not public
// private final SimpleStringProperty dateStringProperty;
private final SimpleDoubleProperty PlanProperty;
private final SimpleObjectProperty<Date> dateProperty;
private Plana( double gPlan, Date gDate) {
// this.dateStringProperty = new SimpleStringProperty(gStringDate);
this.PlanProperty = new SimpleDoubleProperty(gPlan);
this.dateProperty = new SimpleObjectProperty<Date>(gDate);
}
/**
* @return the dateStringProperty
*/
// public SimpleStringProperty getDateStringProperty() {
// return dateStringProperty;
//}
/**
* @return the planProperty
*/
public SimpleDoubleProperty getPlanProperty() {
return PlanProperty;
}
/**
* @return the dateProperty
*/
public SimpleObjectProperty<Date> getDateProperty() {
return dateProperty;
}
}
}
这是startclass：
package org.xcellcomm;
import java.util.Date;
import javafx.application.Application;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.stage.Stage;
public class Start extends Application {
@Override
public void start(Stage stage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("mainMrc.fxml"));
Scene scene = new Scene(root);
stage.setTitle("MRC Monitor");
stage.setScene(scene);
stage.show();
}
public static void main(String []args){
launch(args);
}
}
mainMrc.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.*?>
<?import javafx.scene.text.*?>
<?import javafx.scene.chart.*?>
<?import javafx.geometry.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.VBox?>
<BorderPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="600.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="org.xcellcomm.Controller">
<center>
<VBox prefHeight="200.0" prefWidth="100.0" BorderPane.alignment="CENTER">
<children>
<Label text="Add New Activation :">
<VBox.margin>
<Insets />
</VBox.margin>
</Label>
<HBox prefHeight="100.0" prefWidth="200.0">
<children>
<HBox prefHeight="90.0" prefWidth="200.0">
<children>
<VBox prefHeight="200.0" prefWidth="100.0">
<children>
<Label text="Select Plan Rate :" />
<RadioButton fx:id="plan40Radio" mnemonicParsing="false" text="40 or less Plan" />
<RadioButton fx:id="plan50Radio" mnemonicParsing="false" text="50 Plan" />
<RadioButton fx:id="plan60Radio" mnemonicParsing="false" text="60 Plan" />
<Region prefHeight="16.0" prefWidth="100.0" />
<Button fx:id="buttonAddActivation" mnemonicParsing="false" onAction="#buttonAddActivationPressed" text="Add Activation" />
</children>
</VBox>
</children>
</HBox>
<VBox prefHeight="102.0" prefWidth="163.0">
<children>
<Label text="Added Features :" />
<CheckBox fx:id="checkboxFeaturePhp" layoutX="10.0" layoutY="27.0" mnemonicParsing="false" text="PHP" />
<CheckBox fx:id="checkboxBlockIt" mnemonicParsing="false" text="Block it" />
<CheckBox fx:id="checkboxFeatureValueBundle" mnemonicParsing="false" text="Value Bundle" />
</children>
</VBox>
<VBox prefHeight="200.0" prefWidth="100.0">
<children>
<Label text=" " />
<CheckBox fx:id="checkboxFeatureLookout" mnemonicParsing="false" text="Lookout MS" />
<CheckBox fx:id="checkboxFeatureRhpsody" mnemonicParsing="false" text="Rhapsody" />
<CheckBox fx:id="checkboxFeatureWorldCalling" mnemonicParsing="false" text="World Calling" />
</children>
</VBox>
</children>
</HBox>
<Region prefHeight="23.0" prefWidth="600.0" />
<HBox prefHeight="131.0" prefWidth="580.0">
<children>
<TableView prefHeight="100.0" prefWidth="263.0">
<columns>
<TableColumn prefWidth="109.0" text="Time" />
<TableColumn prefWidth="82.0" text="Plan" />
</columns>
<HBox.margin>
<Insets left="10.0" />
</HBox.margin>
</TableView>
<Region prefHeight="200.0" prefWidth="200.0" HBox.hgrow="ALWAYS" />
<TableView prefHeight="100.0" prefWidth="309.0">
<columns>
<TableColumn prefWidth="147.0" text="Date" />
<TableColumn prefWidth="90.0" text="MRC" />
</columns>
<HBox.margin>
<Insets right="10.0" />
</HBox.margin>
</TableView>
</children>
</HBox>
<Region prefHeight="29.0" prefWidth="580.0" />
<HBox prefHeight="100.0" prefWidth="200.0">
<children>
<VBox prefHeight="150.0" prefWidth="218.0">
<children>
<Label text="Today Activations" />
<TextField fx:id="textfeildTodayActivations" editable="false" maxWidth="100.0" prefHeight="39.0" prefWidth="100.0" promptText="Activations">
<font>
<Font size="18.0" />
</font>
</TextField>
<Label text="Today Goal" />
<TextField fx:id="textfeildTodayGoal" editable="false" maxWidth="100.0" prefHeight="39.0" prefWidth="100.0" promptText="Goal">
<font>
<Font size="18.0" />
</font>
</TextField>
<Label text="Current Process" />
<ProgressBar prefWidth="200.0" progress="0.0" />
</children>
</VBox>
<Region prefHeight="150.0" prefWidth="80.0" HBox.hgrow="ALWAYS" />
<LineChart prefHeight="150.0" prefWidth="281.0">
<xAxis>
<CategoryAxis side="BOTTOM" />
</xAxis>
<yAxis>
<NumberAxis side="LEFT" />
</yAxis>
</LineChart>
</children>
</HBox>
</children>
<BorderPane.margin>
<Insets left="10.0" right="10.0" />
</BorderPane.margin>
</VBox>
</center>
<top>
<MenuBar BorderPane.alignment="CENTER">
<menus>
<Menu mnemonicParsing="false" text="File">
<items>
<MenuItem mnemonicParsing="false" text="Close" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="Edit">
<items>
<MenuItem mnemonicParsing="false" text="Delete" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="Help">
<items>
<MenuItem mnemonicParsing="false" text="About" />
</items>
</Menu>
</menus>
</MenuBar>
</top>
</BorderPane>
答案 0 :(得分：1)
你的FXML文件中的tableView没有和id，你有<TableView prefHeight="100.0" prefWidth="263.0">，它应该在你的复选框，单选按钮等中分配一个id。