Java 如何在操作事件中消除空指针异常？

我试图通过点击按钮将用户在文本框中键入的int添加到另一个文本框中。我正在使用FXML，我已将on操作设置为calculateTotal（）。当我在按钮运行时单击按钮，我会在该行上看到一个空指针

int sal1 = Integer.parseInt(sale1.getText());

下面是代码的其余部分。错误所在的行位于calculateTotal（）的底部

package-taxerfxml；
导入java.net.URL；
导入java.util.ResourceBundle；
导入javafx.collections.FXCollections；
导入javafx.collections.ObservableList；
导入javafx.event.ActionEvent；
导入javafx.event.EventHandler；
导入javafx.fxml.fxml；
导入javafx.fxml.Initializable；
导入javafx.scene.control.Button；
导入javafx.scene.control.ComboBox；
导入javafx.scene.control.Label；
导入javafx.scene.control.TextField；
导入javax.swing.JComboBox；
导入静态sun.misc.Signal.handle；
/**
*
*@作者
*/
公共类FXMLDocumentController实现可初始化{
ObservableList ComboxList=FXCollections.observableArrayList（“Ccosta”、“ALM”、“Sclara”、“Smateo”、“Sf”、“Marin”、“Sonoma”、“Napa”、“Solono”）；
//fxml组合框
@FXML
专用组合框组合框1；
@FXML
专用组合框组合框2；
@FXML
专用组合框组合框3；
@FXML
专用组合框组合框4；
@FXML
专用组合框组合框5；
@FXML
专用组合框组合框6；
@FXML
专用组合框组合框7；
@FXML
专用组合框组合框8；
@FXML
专用组合框组合框9；
@FXML
专用组合框组合框10；
@FXML
专用组合框组合框11；
@FXML
专用组合框组合框12；
//fxml标签
@FXML
自有品牌销售；
@FXML
自有品牌税；
@FXML
自有品牌县；
@FXML
自有品牌货运；
@FXML
自有品牌劳工；
@FXML
自有品牌成本；
@FXML
自有品牌利润；
@FXML
自有品牌客户；
//fxml客户文本字段
@FXML
私有文本字段customer1；
@FXML
私有文本字段customer2；
@FXML
私有文本字段customer3；
@FXML
私有文本字段customer4；
@FXML
私有文本字段customer5；
@FXML
私有文本字段customer6；
@FXML
私有文本字段customer7；
@FXML
私有文本字段customer8；
@FXML
私有文本字段customer9；
@FXML
私有文本字段customer10；
@FXML
私有文本字段customer11；
@FXML
私有文本字段customer12；
//fxml销售文本字段
@FXML
私人TextField sale1；
@FXML
私人TextField sale2；
@FXML
私人TextField sale3；
@FXML
私人TextField sale4；
@FXML
私人TextField sale5；
@FXML
私人TextField sale6；
@FXML
私人TextField sale7；
@FXML
私人TextField sale8；
@FXML
私人TextField sale9；
@FXML
私人TextField sale10；
@FXML
私人TextField sale11；
@FXML
私人TextField sale12；
//fxml税务文本字段
@FXML
私人文本字段分类1；
@FXML
私人文本字段分类2；
@FXML
私有文本字段tax3；
@FXML
私有文本字段4；
@FXML
私有文本字段tax5；
@FXML
私有文本字段6；
@FXML
私人文本字段分类7；
@FXML
私人TextField税种8；
@FXML
私人文本字段分类9；
@FXML
私人文本字段10；
@FXML
私人文本字段税11；
@FXML
私有文本字段12；
//fxml货运文本字段
@FXML
私人TextField货运1；
@FXML
私人TextField货运2；
@FXML
私人TextField货运3；
@FXML
私人TextField货运4；
@FXML
私人TextField货运5；
@FXML
私人TextField货运6；
@FXML
私人TextField货运7；
@FXML
私人TextField货运公司8；
@FXML
私人TextField货运公司9；
@FXML
私人TextField货运公司10；
@FXML
私人TextField货运公司11；
@FXML
私人TextField货运公司12；
//fxml人工文本字段
@FXML
私人TextField实验室1；
@FXML
私人TextField实验室2；
@FXML
私人TextField实验室3；
@FXML
私人文本字段4；
@FXML
私人文本字段5；
@FXML
私人TextField实验室6；
@FXML
私人TextField实验室7；
@FXML
私人TextField实验室8；
@FXML
私人TextField实验室9；
@FXML
私人文本字段10；
@FXML
私人TextField实验室11；
@FXML
私人TextField实验室12；
//fxml成本文本字段
@FXML
私人TextField成本1；
@FXML
私人TextField成本2；
@FXML
私人TextField成本3；
@FXML
私人TextField成本4；
@FXML
私人TextField成本5；
@FXML
私人TextField成本6；
@FXML
私人TextField成本7；
@FXML
私人TextField成本8；
@FXML
私人TextField成本9；
@FXML
私人TextField成本10；
@FXML
私人TextField成本11；
@FXML
私人TextField成本12；
//fxml利润文本字段
@FXML
私有文本字段profit1；
@FXML
私人TextField profit2；
@FXML
私人TextField profit3；
@FXML
私有文本字段利润4；
@FXML
私人TextField profit5；
@FXML
私有文本字段profit6；
@FXML
私有文本字段利润7；
@FXML
私有文本字段利润8；
@FXML
私人TextField profit9；
@FXML
私有文本字段利润10；
@FXML
私有文本字段利润11；
@FXML
私有文本字段利润12；
//fxml按钮计算
@FXML
私有按钮计算；
@凌驾
公共void初始化（URL、ResourceBundle rb）{
//初始化组合框变量
comboBox1.设定值（“县”）；
comboBox1.setItems（comboBoxList）；
comboBox2.设定值（“县”）；
comboBox2.setItems（comboBoxList）；
comboBox3.设定值（“县”）；
package taxerfxml;

import java.net.URL;
import java.util.ResourceBundle;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javax.swing.JComboBox;
import static sun.misc.Signal.handle;


/**
 *
 * @author 
 */
public class FXMLDocumentController implements Initializable  {
    ObservableList<String> comboBoxList = FXCollections.observableArrayList("Ccosta", "Alam", "Sclara", "Smateo", "Sf", "Marin", "Sonoma", "Napa", "Solono");

//fxml combo boxes
    @FXML
    private ComboBox comboBox1;
    @FXML
    private ComboBox comboBox2;
    @FXML
    private ComboBox comboBox3;
    @FXML
    private ComboBox comboBox4;
    @FXML
    private ComboBox comboBox5;
    @FXML
    private ComboBox comboBox6;
    @FXML
    private ComboBox comboBox7;
    @FXML
    private ComboBox comboBox8;
    @FXML
    private ComboBox comboBox9;
    @FXML
    private ComboBox comboBox10;
    @FXML
    private ComboBox comboBox11;
    @FXML
    private ComboBox comboBox12;

//fxml labels
    @FXML
    private Label sale;    
    @FXML
    private Label tax;
    @FXML
    private Label county;  
    @FXML
    private Label freight;
    @FXML
    private Label labor;
    @FXML
    private Label cost;
    @FXML
    private Label profit;
    @FXML
    private Label customer;

    // fxml customer textfields
    @FXML
    private TextField customer1;
    @FXML
    private TextField customer2;
    @FXML
    private TextField customer3;
    @FXML
    private TextField customer4;
    @FXML
    private TextField customer5;
    @FXML
    private TextField customer6;
    @FXML
    private TextField customer7;
    @FXML
    private TextField customer8;
    @FXML
    private TextField customer9;
    @FXML
    private TextField customer10;
    @FXML
    private TextField customer11;
    @FXML
    private TextField customer12;

    //fxml sale textfields

    @FXML
    private TextField sale1;
    @FXML
    private TextField sale2;
    @FXML
    private TextField sale3;
    @FXML
    private TextField sale4;
    @FXML
    private TextField sale5;
    @FXML
    private TextField sale6;
    @FXML
    private TextField sale7;
    @FXML
    private TextField sale8;
    @FXML
    private TextField sale9;
    @FXML
    private TextField sale10;
    @FXML
    private TextField sale11;
    @FXML
    private TextField sale12;

    //fxml tax textfields 

    @FXML
    private TextField tax1;
    @FXML
    private TextField tax2;
    @FXML
    private TextField tax3;
    @FXML
    private TextField tax4;
    @FXML
    private TextField tax5;
    @FXML
    private TextField tax6;
    @FXML
    private TextField tax7;
    @FXML
    private TextField tax8;
    @FXML
    private TextField tax9;
    @FXML
    private TextField tax10;
    @FXML
    private TextField tax11;
    @FXML
    private TextField tax12;

    //fxml freight textfields
    @FXML
    private TextField freight1;
    @FXML
    private TextField freight2;
    @FXML
    private TextField freight3;
    @FXML
    private TextField freight4;
    @FXML
    private TextField freight5;
    @FXML
    private TextField freight6;
    @FXML
    private TextField freight7;
    @FXML
    private TextField freight8;
    @FXML
    private TextField freight9;
    @FXML
    private TextField freight10;
    @FXML
    private TextField freight11;
    @FXML
    private TextField freight12;

    //fxml labor textfields
    @FXML
    private TextField labor1;
    @FXML
    private TextField labor2;
    @FXML
    private TextField labor3;
    @FXML
    private TextField labor4;
    @FXML
    private TextField labor5;
    @FXML
    private TextField labor6;
    @FXML
    private TextField labor7;
    @FXML
    private TextField labor8;
    @FXML
    private TextField labor9;
    @FXML
    private TextField labor10;
    @FXML
    private TextField labor11;
    @FXML
    private TextField labor12;

    //fxml cost textfields
    @FXML
    private TextField cost1;
    @FXML
    private TextField cost2;
    @FXML
    private TextField cost3;
    @FXML
    private TextField cost4;
    @FXML
    private TextField cost5;
    @FXML
    private TextField cost6;
    @FXML
    private TextField cost7;
    @FXML
    private TextField cost8;
    @FXML
    private TextField cost9;
    @FXML
    private TextField cost10;
    @FXML
    private TextField cost11;
    @FXML
    private TextField cost12;

    //fxml profit textfields
    @FXML
    private TextField profit1;
    @FXML
    private TextField profit2;
    @FXML
    private TextField profit3;
    @FXML
    private TextField profit4;
    @FXML
    private TextField profit5;
    @FXML
    private TextField profit6;
    @FXML
    private TextField profit7;
    @FXML
    private TextField profit8;
    @FXML
    private TextField profit9;
    @FXML
    private TextField profit10;
    @FXML
    private TextField profit11;
    @FXML
    private TextField profit12;

    //fxml button calculate   
   @FXML
    private Button calculate;




    @Override
    public void initialize(URL url, ResourceBundle rb) {



         //initialize combobox variables
        comboBox1.setValue("County");
        comboBox1.setItems(comboBoxList);

        comboBox2.setValue("County");
        comboBox2.setItems(comboBoxList);

        comboBox3.setValue("County");
        comboBox3.setItems(comboBoxList);

        comboBox4.setValue("County");
        comboBox4.setItems(comboBoxList);

        comboBox5.setValue("County");
        comboBox5.setItems(comboBoxList);

        comboBox6.setValue("County");
        comboBox6.setItems(comboBoxList);

        comboBox7.setValue("County");
        comboBox7.setItems(comboBoxList);

        comboBox8.setValue("County");
        comboBox8.setItems(comboBoxList);

        comboBox9.setValue("County");
        comboBox9.setItems(comboBoxList);

        comboBox10.setValue("County");
        comboBox10.setItems(comboBoxList);

        comboBox11.setValue("County");
        comboBox11.setItems(comboBoxList);

        comboBox12.setValue("County");
        comboBox12.setItems(comboBoxList);
    }

        @FXML
        public void calculateTotal(ActionEvent event){

        //add values put into textfields  
       // calculateTotal.setOnAction(new EventHandler<ActionEvent>() {
       // if(event.getSource()==calculateTotal){

        //row1
        int sal1 = Integer.parseInt(sale1.getText());
        int taxx1 = Integer.parseInt(tax1.getText());
        int frei1 = Integer.parseInt(freight1.getText());
        int lab1 = Integer.parseInt(labor1.getText());
        int cos1 = Integer.parseInt(cost1.getText());        
        int result1 = sal1 + taxx1 + frei1 + lab1 + cos1;
        profit1.setText(profit1.getText()+result1);


        //row2
        int sal2 = Integer.parseInt(sale2.getText());
        int taxx2 = Integer.parseInt(tax2.getText());
        int frei2 = Integer.parseInt(freight2.getText());
        int lab2 = Integer.parseInt(labor2.getText());
        int cos2 = Integer.parseInt(cost2.getText());        
        int result2 = sal2 + taxx2 + frei2 + lab2 + cos2;
        profit2.setText(profit2.getText()+result2);     

        //row3
        int sal3 = Integer.parseInt(sale3.getText());
        int taxx3 = Integer.parseInt(tax3.getText());
        int frei3 = Integer.parseInt(freight3.getText());
        int lab3 = Integer.parseInt(labor3.getText());
        int cos3 = Integer.parseInt(cost3.getText());        
        int result3 = sal3 + taxx3 + frei3 + lab3 + cos3;
        profit3.setText(profit3.getText()+result3);

        //row4
        int sal4 = Integer.parseInt(sale4.getText());
        int taxx4 = Integer.parseInt(tax4.getText());
        int frei4 = Integer.parseInt(freight4.getText());
        int lab4 = Integer.parseInt(labor4.getText());
        int cos4 = Integer.parseInt(cost4.getText());        
        int result4 = sal4 + taxx4 + frei4 + lab4 + cos4;
        profit4.setText(profit4.getText()+result4);

        //row5
        int sal5 = Integer.parseInt(sale5.getText());
        int taxx5 = Integer.parseInt(tax5.getText());
        int frei5 = Integer.parseInt(freight5.getText());
        int lab5 = Integer.parseInt(labor5.getText());
        int cos5 = Integer.parseInt(cost5.getText());        
        int result5 = sal5 + taxx5 + frei5 + lab5 + cos5;
        profit5.setText(profit5.getText()+result5);

        //row6
        int sal6 = Integer.parseInt(sale6.getText());
        int taxx6 = Integer.parseInt(tax6.getText());
        int frei6 = Integer.parseInt(freight6.getText());
        int lab6 = Integer.parseInt(labor6.getText());
        int cos6 = Integer.parseInt(cost6.getText());        
        int result6 = sal6 + taxx6 + frei6 + lab6 + cos6;
        profit6.setText(profit6.getText()+result6);

        //row7
        int sal7 = Integer.parseInt(sale7.getText());
        int taxx7 = Integer.parseInt(tax7.getText());
        int frei7 = Integer.parseInt(freight7.getText());
        int lab7 = Integer.parseInt(labor7.getText());
        int cos7 = Integer.parseInt(cost7.getText());        
        int result7 = sal7 + taxx7 + frei7 + lab7 + cos7;
        profit7.setText(profit7.getText()+result7);

        //row8
        int sal8 = Integer.parseInt(sale8.getText());
        int taxx8 = Integer.parseInt(tax8.getText());
        int frei8 = Integer.parseInt(freight8.getText());
        int lab8 = Integer.parseInt(labor8.getText());
        int cos8 = Integer.parseInt(cost8.getText());        
        int result8 = sal8 + taxx8 + frei8 + lab8 + cos8;
        profit8.setText(profit8.getText()+result8);

        //row9
        int sal9 = Integer.parseInt(sale9.getText());
        int taxx9 = Integer.parseInt(tax9.getText());
        int frei9 = Integer.parseInt(freight9.getText());
        int lab9 = Integer.parseInt(labor9.getText());
        int cos9 = Integer.parseInt(cost9.getText());        
        int result9 = sal9 + taxx9 + frei9 + lab9 + cos9;
        profit9.setText(profit9.getText()+result9);

        //row10
        int sal10 = Integer.parseInt(sale10.getText());
        int taxx10 = Integer.parseInt(tax10.getText());
        int frei10 = Integer.parseInt(freight10.getText());
        int lab10 = Integer.parseInt(labor10.getText());
        int cos10 = Integer.parseInt(cost10.getText());        
        int result10 = sal10 + taxx10 + frei10 + lab10 + cos10;
        profit10.setText(profit10.getText()+result10);

        //row11
        int sal11 = Integer.parseInt(sale11.getText());
        int taxx11 = Integer.parseInt(tax11.getText());
        int frei11 = Integer.parseInt(freight11.getText());
        int lab11 = Integer.parseInt(labor11.getText());
        int cos11 = Integer.parseInt(cost11.getText());        
        int result11 = sal11 + taxx11 + frei11 + lab11 + cos11;
        profit11.setText(profit11.getText()+result11);

        //row12
        int sal12 = Integer.parseInt(sale12.getText());
        int taxx12 = Integer.parseInt(tax12.getText());
        int frei12 = Integer.parseInt(freight12.getText());
        int lab12 = Integer.parseInt(labor12.getText());
        int cos12 = Integer.parseInt(cost12.getText());        
        int result12 = sal12 + taxx12 + frei12 + lab12 + cos12;
        profit12.setText(profit12.getText()+result12);




        }


}

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.shape.*?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<AnchorPane id="AnchorPane" prefHeight="615.0" prefWidth="1070.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="taxerfxml.FXMLDocumentController">
    <children>
      <Accordion layoutX="14.0" layoutY="14.0" />
      <Label layoutX="238.0" layoutY="6.0" text="Sale" />
      <Label layoutX="358.0" layoutY="6.0" text="Tax" />
      <Label layoutX="491.0" layoutY="6.0" text="County" />
      <Label layoutX="622.0" layoutY="6.0" text="Freight" />
      <Label layoutX="741.0" layoutY="6.0" text="Labor" />
      <Label layoutX="857.0" layoutY="6.0" text="Cost" />
      <Label layoutX="994.0" layoutY="6.0" text="Profit" />
      <Label layoutX="14.0" layoutY="6.0" text="Customer" />
      <TextField layoutY="81.0" text="Customer 1" />
      <TextField layoutY="125.0" text="Customer 2" />
      <TextField layoutY="168.0" text="Customer 3" />
      <TextField layoutY="212.0" text="Customer 4" />
      <TextField layoutY="256.0" text="Customer 5" />
      <TextField layoutY="303.0" text="Customer 6" />
      <TextField layoutY="346.0" text="Customer 7" />
      <TextField layoutY="394.0" text="Customer 8" />
      <TextField layoutY="439.0" text="Customer 9" />
      <TextField layoutY="485.0" text="Customer 10" />
      <TextField layoutY="537.0" text="Customer 11" />
      <TextField layoutY="582.0" text="Customer 12" />
      <TextField layoutX="205.0" layoutY="83.0" prefHeight="25.0" prefWidth="88.0" text="Sale1" />
      <TextField layoutX="205.0" layoutY="127.0" prefHeight="25.0" prefWidth="88.0" text="Sale2" />
      <TextField layoutX="205.0" layoutY="170.0" prefHeight="25.0" prefWidth="88.0" text="Sale3" />
      <TextField layoutX="205.0" layoutY="214.0" prefHeight="25.0" prefWidth="88.0" text="Sale4" />
      <TextField layoutX="205.0" layoutY="258.0" prefHeight="25.0" prefWidth="88.0" text="Sale5" />
      <TextField layoutX="205.0" layoutY="305.0" prefHeight="25.0" prefWidth="88.0" text="Sale6" />
      <TextField layoutX="205.0" layoutY="348.0" prefHeight="25.0" prefWidth="88.0" text="Sale7" />
      <TextField layoutX="205.0" layoutY="396.0" prefHeight="25.0" prefWidth="88.0" text="Sale8" />
      <TextField layoutX="205.0" layoutY="441.0" prefHeight="25.0" prefWidth="88.0" text="Sale9" />
      <TextField layoutX="205.0" layoutY="487.0" prefHeight="25.0" prefWidth="88.0" text="Sale10" />
      <TextField layoutX="205.0" layoutY="539.0" prefHeight="25.0" prefWidth="88.0" text="Sale11" />
      <TextField layoutX="205.0" layoutY="584.0" prefHeight="25.0" prefWidth="88.0" text="Sale12" />
      <TextField layoutX="319.0" layoutY="83.0" prefHeight="25.0" prefWidth="97.0" text="Tax1" />
      <TextField layoutX="319.0" layoutY="127.0" prefHeight="25.0" prefWidth="97.0" text="Tax2" />
      <TextField layoutX="319.0" layoutY="168.0" prefHeight="25.0" prefWidth="97.0" text="Tax3" />
      <TextField layoutX="319.0" layoutY="214.0" prefHeight="25.0" prefWidth="97.0" text="Tax4" />
      <TextField layoutX="319.0" layoutY="258.0" prefHeight="25.0" prefWidth="97.0" text="Tax5" />
      <TextField layoutX="319.0" layoutY="305.0" prefHeight="25.0" prefWidth="97.0" text="Tax6" />
      <TextField layoutX="319.0" layoutY="348.0" prefHeight="25.0" prefWidth="97.0" text="Tax7" />
      <TextField layoutX="319.0" layoutY="394.0" prefHeight="25.0" prefWidth="97.0" text="Tax8" />
      <TextField layoutX="319.0" layoutY="441.0" prefHeight="25.0" prefWidth="97.0" text="Tax9" />
      <TextField layoutX="319.0" layoutY="487.0" prefHeight="25.0" prefWidth="97.0" text="Tax10" />
      <TextField layoutX="319.0" layoutY="539.0" prefHeight="25.0" prefWidth="97.0" text="Tax11" />
      <TextField layoutX="319.0" layoutY="584.0" prefHeight="25.0" prefWidth="97.0" text="Tax12" />
      <ComboBox id="comboBox1" fx:id="comboBox1" layoutX="466.0" layoutY="77.0" prefHeight="34.0" prefWidth="88.0" promptText="Choose" />
      <ComboBox id="comboBox2" fx:id="comboBox2" layoutX="466.0" layoutY="120.0" prefHeight="34.0" prefWidth="88.0" promptText="Choose" /> 
      <ComboBox id="comboBox3" fx:id="comboBox3" layoutX="466.0" layoutY="166.0" prefHeight="34.0" prefWidth="88.0" promptText="Choose" />
      <ComboBox id="comboBox4" fx:id="comboBox4" layoutX="466.0" layoutY="210.0" prefHeight="34.0" prefWidth="88.0" promptText="Choose" />
      <ComboBox id="comboBox5" fx:id="comboBox5" layoutX="466.0" layoutY="254.0" prefHeight="34.0" prefWidth="88.0" promptText="Choose" />
      <ComboBox id="comboBox6" fx:id="comboBox6" layoutX="466.0" layoutY="301.0" prefHeight="34.0" prefWidth="88.0" promptText="Choose" />
      <ComboBox id="comboBox7" fx:id="comboBox7" layoutX="466.0" layoutY="344.0" prefHeight="34.0" prefWidth="88.0" promptText="Choose" />
      <ComboBox id="comboBox8" fx:id="comboBox8" layoutX="466.0" layoutY="392.0" prefHeight="34.0" prefWidth="88.0" promptText="Choose" />
      <ComboBox id="comboBox9" fx:id="comboBox9" layoutX="466.0" layoutY="437.0" prefHeight="34.0" prefWidth="88.0" promptText="Choose" />
      <ComboBox id="comboBox10" fx:id="comboBox10" layoutX="466.0" layoutY="483.0" prefHeight="34.0" prefWidth="88.0" promptText="Choose" />
      <ComboBox id="comboBox11" fx:id="comboBox11" layoutX="466.0" layoutY="533.0" prefHeight="34.0" prefWidth="88.0" promptText="Choose" />
      <ComboBox id="comboBox12" fx:id="comboBox12" layoutX="466.0" layoutY="580.0" prefHeight="34.0" prefWidth="88.0" promptText="Choose" />
      <Button fx:id="calculate" layoutX="976.0" layoutY="23.0" mnemonicParsing="false" onAction="#calculateTotal" text="Calculate" />
      <TextField layoutX="597.0" layoutY="81.0" prefHeight="17.0" prefWidth="88.0" text="Freight1" />
      <TextField layoutX="597.0" layoutY="125.0" prefHeight="17.0" prefWidth="88.0" text="Freight2" />
      <TextField layoutX="597.0" layoutY="171.0" prefHeight="17.0" prefWidth="88.0" text="Freight3" />
      <TextField layoutX="597.0" layoutY="212.0" prefHeight="17.0" prefWidth="88.0" text="Freight4" />
      <TextField layoutX="597.0" layoutY="256.0" prefHeight="17.0" prefWidth="88.0" text="Freight5" />
      <TextField layoutX="597.0" layoutY="303.0" prefHeight="17.0" prefWidth="88.0" text="Freight6" />
      <TextField layoutX="597.0" layoutY="346.0" prefHeight="17.0" prefWidth="88.0" text="Freight7" />
      <TextField layoutX="597.0" layoutY="396.0" prefHeight="17.0" prefWidth="88.0" text="Freight8" />
      <TextField layoutX="597.0" layoutY="439.0" prefHeight="17.0" prefWidth="88.0" text="Freight9" />
      <TextField layoutX="597.0" layoutY="485.0" prefHeight="17.0" prefWidth="88.0" text="Freight10" />
      <TextField layoutX="597.0" layoutY="537.0" prefHeight="17.0" prefWidth="88.0" text="Freight11" />
      <TextField layoutX="597.0" layoutY="582.0" prefHeight="17.0" prefWidth="88.0" text="Freight12" />
      <TextField layoutX="712.0" layoutY="81.0" prefHeight="25.0" prefWidth="88.0" text="Labor1" />
      <TextField layoutX="712.0" layoutY="125.0" prefHeight="25.0" prefWidth="88.0" text="Labor2" />
      <TextField layoutX="712.0" layoutY="171.0" prefHeight="25.0" prefWidth="88.0" text="Labor3" />
      <TextField layoutX="713.0" layoutY="212.0" prefHeight="25.0" prefWidth="88.0" text="Labor4" />
      <TextField layoutX="713.0" layoutY="256.0" prefHeight="25.0" prefWidth="88.0" text="Labor5" />
      <TextField layoutX="713.0" layoutY="303.0" prefHeight="25.0" prefWidth="88.0" text="Labor6" />
      <TextField layoutX="713.0" layoutY="346.0" prefHeight="25.0" prefWidth="88.0" text="Labor7" />
      <TextField layoutX="713.0" layoutY="397.0" prefHeight="25.0" prefWidth="88.0" text="Labor8" />
      <TextField layoutX="713.0" layoutY="439.0" prefHeight="25.0" prefWidth="88.0" text="Labor9" />
      <TextField layoutX="713.0" layoutY="485.0" prefHeight="25.0" prefWidth="88.0" text="Labor10" />
      <TextField layoutX="713.0" layoutY="537.0" prefHeight="25.0" prefWidth="88.0" text="Labor11" />
      <TextField layoutX="713.0" layoutY="582.0" prefHeight="25.0" prefWidth="88.0" text="Labor12" />
      <TextField layoutX="825.0" layoutY="82.0" prefHeight="25.0" prefWidth="88.0" text="Cost1" />
      <TextField layoutX="825.0" layoutY="125.0" prefHeight="25.0" prefWidth="88.0" text="Cost2" />
      <TextField layoutX="825.0" layoutY="170.0" prefHeight="25.0" prefWidth="88.0" text="Cost3" />
      <TextField layoutX="825.0" layoutY="212.0" prefHeight="25.0" prefWidth="88.0" text="Cost4" />
      <TextField layoutX="825.0" layoutY="256.0" prefHeight="25.0" prefWidth="88.0" text="Cost5" />
      <TextField layoutX="825.0" layoutY="303.0" prefHeight="25.0" prefWidth="88.0" text="Cost6" />
      <TextField layoutX="825.0" layoutY="346.0" prefHeight="25.0" prefWidth="88.0" text="Cost7" />
      <TextField layoutX="825.0" layoutY="396.0" prefHeight="25.0" prefWidth="88.0" text="Cost8" />
      <TextField layoutX="825.0" layoutY="439.0" prefHeight="25.0" prefWidth="88.0" text="Cost9" />
      <TextField layoutX="825.0" layoutY="485.0" prefHeight="25.0" prefWidth="88.0" text="Cost10" />
      <TextField layoutX="825.0" layoutY="537.0" prefHeight="25.0" prefWidth="88.0" text="Cost11" />
      <TextField layoutX="825.0" layoutY="582.0" prefHeight="25.0" prefWidth="88.0" text="Cost12" />
      <TextField layoutX="952.0" layoutY="81.0" prefHeight="25.0" prefWidth="114.0" text="Profit1" />
      <TextField layoutX="952.0" layoutY="125.0" prefHeight="25.0" prefWidth="114.0" text="Profit2" />
      <TextField layoutX="952.0" layoutY="168.0" prefHeight="25.0" prefWidth="114.0" text="Profit3" />
      <TextField layoutX="952.0" layoutY="212.0" prefHeight="25.0" prefWidth="114.0" text="Profit4" />
      <TextField layoutX="952.0" layoutY="256.0" prefHeight="25.0" prefWidth="114.0" text="Profit5" />
      <TextField layoutX="952.0" layoutY="303.0" prefHeight="25.0" prefWidth="114.0" text="Profit6" />
      <TextField layoutX="952.0" layoutY="346.0" prefHeight="25.0" prefWidth="114.0" text="Profit7" />
      <TextField layoutX="952.0" layoutY="394.0" prefHeight="25.0" prefWidth="114.0" text="Profit8" />
      <TextField layoutX="952.0" layoutY="439.0" prefHeight="25.0" prefWidth="114.0" text="Profit9" />
      <TextField layoutX="952.0" layoutY="485.0" prefHeight="25.0" prefWidth="114.0" text="Profit10" />
      <TextField layoutX="952.0" layoutY="537.0" prefHeight="25.0" prefWidth="114.0" text="Profit11" />
      <TextField layoutX="952.0" layoutY="582.0" prefHeight="25.0" prefWidth="114.0" text="Profit12" />

    </children>
</AnchorPane>

try { //it will attempt to convert the text
... your code
} catch (Exception e) { // if it fails the following code will happen
... error response code
}