Написание десктопного приложения с помощью JavaFX

<?xml version="1.0" encoding="UTF-8"?>  <?import javafx.scene.control.Button?> <?import javafx.scene.control.CheckBox?> <?import javafx.scene.control.Label?> <?import javafx.scene.control.TextField?> <?import javafx.scene.image.Image?> <?import javafx.scene.image.ImageView?> <?import javafx.scene.layout.GridPane?> <?import javafx.scene.layout.Pane?> <?import javafx.scene.layout.VBox?>  <Pane prefHeight="600.0" prefWidth="900.0" xmlns="http://javafx.com/javafx/8.0.112" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">     <children>       <Button fx:id="button" layoutX="40.0" layoutY="200.0" mnemonicParsing="false" onAction="#showDateTime" prefHeight="71.0" prefWidth="528.0" text="=" />        <VBox layoutX="312.0" layoutY="20.0" minHeight="-Infinity" minWidth="-Infinity" prefHeight="200.0" prefWidth="280.0" GridPane.columnIndex="1">          <children>             <TextField fx:id="myTextField1" promptText="Значение а" />             <TextField fx:id="myTextField2" promptText="значение b (наименьшая сторона)" />             <TextField fx:id="myTextField3" promptText="Толщина" />             <TextField fx:id="myTextField4" prefHeight="25.0" prefWidth="280.0" promptText="Модуль упругости Е" />             <TextField fx:id="myTextField6" prefHeight="25.0" prefWidth="280.0" promptText="Действующие напряжения" />          </children>       </VBox>       <VBox layoutX="611.0" prefHeight="562.0" prefWidth="271.0" GridPane.columnIndex="21">          <children>             <ImageView fx:id="image" fitHeight="116.0" fitWidth="174.0" pickOnBounds="true" preserveRatio="true">                <image>                   <Image url="@Zadelka1.PNG" />                </image></ImageView>             <CheckBox fx:id="checkbox1" mnemonicParsing="false" text="Все края защемлены" />             <ImageView fitHeight="122.0" fitWidth="237.0" layoutX="30.0" pickOnBounds="true" preserveRatio="true">                <image>                   <Image url="@Zadelka2.PNG" />                </image></ImageView>             <CheckBox fx:id="checkbox2" mnemonicParsing="false" text="Шарнир по верхним  и нижним кромкам" />             <ImageView fitHeight="127.0" fitWidth="272.0" pickOnBounds="true" preserveRatio="true">                <image>                   <Image url="@Zadelka3.PNG" />                </image></ImageView>             <CheckBox fx:id="checkbox3" mnemonicParsing="false" text="Шарнир по бокам" />             <ImageView fitHeight="129.0" fitWidth="392.0" pickOnBounds="true" preserveRatio="true">                <image>                   <Image url="@Zadelka4.PNG" />                </image></ImageView>             <CheckBox fx:id="checkbox4" mnemonicParsing="false" text="Шарнир кругом" />          </children>       </VBox>              <VBox layoutX="20.0" layoutY="20.0" minHeight="-Infinity" minWidth="-Infinity" prefHeight="200.0" prefWidth="262.0">          <children>             <Label prefHeight="25.0" prefWidth="185.0" text="Значение a" />             <Label prefHeight="25.0" prefWidth="262.0" text="Значение b (наименьшая сторона)" />             <Label prefHeight="25.0" prefWidth="188.0" text="Толщина" />             <Label prefHeight="25.0" prefWidth="186.0" text="Модуль упругости E" />             <Label prefHeight="25.0" prefWidth="188.0" text="Действующие напряжения" />          </children>       </VBox>       <VBox layoutX="312.0" layoutY="311.0" prefHeight="200.0" prefWidth="280.0">          <children>             <TextField fx:id="myTextField5" prefHeight="25.0" prefWidth="280.0" promptText="Касательное напряжения(кр)" />             <TextField fx:id="myTextField7" prefHeight="25.0" prefWidth="280.0" promptText="Запас прочности" />          </children>       </VBox>       <VBox layoutX="20.0" layoutY="310.0" prefHeight="200.0" prefWidth="262.0">          <children>             <Label prefHeight="25.0" prefWidth="260.0" text="Критическое касательное напряжения" />             <Label prefHeight="25.0" prefWidth="187.0" text="Запас прочности" />          </children>       </VBox>    </children>    </Pane>

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) {         try { //Ссылка на sample.fxml(наш интерфейс).Название программы и создание нашей главной сцен             Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));             primaryStage.setTitle("Чистый сдвиг");             primaryStage.setScene(new Scene(root));             primaryStage.show();          } catch(Exception e) {             e.printStackTrace();         }     }      public static void main(String[] args)  {         launch(args);     } } 

ackage sample;  import javafx.fxml.FXML; import javafx.fxml.Initializable; import javafx.scene.control.Button; import javafx.scene.control.CheckBox; import javafx.scene.control.TextField; import javafx.stage.Stage;  import java.net.URL; import java.util.ResourceBundle;  import static java.lang.Double.NaN; import static java.lang.Double.parseDouble; import static java.lang.String.valueOf;   public class Controller extends TextField implements Initializable  {   //Создание переменных разлчиных типов связанных с интерфейсом     @FXML     private TextField myTextField4;     @FXML     private TextField myTextField1;     @FXML     private TextField myTextField2;     @FXML     private TextField myTextField3;     @FXML     private TextField myTextField5;     @FXML     private TextField myTextField6;     @FXML     private TextField myTextField7;     @FXML     private CheckBox checkbox1;     @FXML     private CheckBox checkbox2;     @FXML     private CheckBox checkbox3;     @FXML     private CheckBox checkbox4;      private double k;     private double krit;     private double zapas;        @Override     public void initialize(URL location, ResourceBundle resources) {                  //Применения фильтра для ввода параметров         myTextField1.setTextFormatter(new AlphaNumericTextFormatter());         myTextField2.setTextFormatter(new AlphaNumericTextFormatter());         myTextField3.setTextFormatter(new AlphaNumericTextFormatter());         myTextField4.setTextFormatter(new AlphaNumericTextFormatter());         //myTextField6.setTextFormatter(new AlphaNumericTextFormatter());     }      public void showDateTime() throws Exception {   //Перевод строки в число         Double a = parseDouble(myTextField1.getText());         Double b = parseDouble(myTextField2.getText());         Double t = parseDouble(myTextField3.getText());         Double e = parseDouble(myTextField4.getText());         Double c = b / a; //Условия выбора CheckBox и отношения стороны         if (checkbox1.isSelected()) {             if (c <= 0.1) {                 k = 8;             } else if ((c > 0.1) && (c <= 0.15)) {                 k = 8.5;             } else if ((c > 0.15) && (c <= 0.2)) {                 k = 8.8;             } else if ((c > 0.2) && (c <= 0.25)) {                 k = 9;             } else if ((c > 0.25) && (c <= 0.30)) {                 k = 9.2;             } else if ((c > 0.3) && (c <= 0.35)) {                 k = 9.5;             } else if ((c > 0.35) && (c <= 0.40)) {                 k = 9.8;             } else if ((c > 0.40) && (c <= 0.45)) {                 k = 10.3;             } else if ((c > 0.45) && (c <= 0.50)) {                 k = 10.5;             } else if ((c > 0.5) && (c <= 0.55)) {                 k = 10.8;             } else if ((c > 0.55) && (c <= 0.6)) {                 k = 11;             } else if ((c > 0.6) && (c <= 0.65)) {                 k = 11.5;             } else if ((c > 0.65) && (c <= 0.7)) {                 k = 11.8;             } else if ((c > 0.7) && (c <= 0.75)) {                 k = 12;             } else if ((c > 0.75) && (c <= 0.8)) {                 k = 12.5;             } else if ((c > 0.8) && (c <= 0.85)) {                 k = 12.8;             } else if ((c > 0.85) && (c <= 0.9)) {                 k = 13;             } else if ((c > 0.9) && (c <= 0.95)) {                 k = 13.5;             } else if ((c > 0.95) && (c <= 1)) {                 k = 14;             }             krit = (k * e) / (Math.pow((b / t), 2));              String d = valueOf(krit);             //перевод числа в строку             myTextField5.setText(d);             }             else if (checkbox2.isSelected()) {                 if (c <= 0.1) {                     k = 8;                 } else if ((c > 0.1) && (c <= 0.15)) {                     k = 8.2;                 } else if ((c > 0.15) && (c <= 0.2)) {                     k = 8.4;                 } else if ((c > 0.2) && (c <= 0.25)) {                     k = 8.5;                 } else if ((c > 0.25) && (c <= 0.30)) {                     k = 8.6;                 } else if ((c > 0.3) && (c <= 0.35)) {                     k = 8.7;                 } else if ((c > 0.35) && (c <= 0.40)) {                     k = 8.9;                 } else if ((c > 0.40) && (c <= 0.45)) {                     k = 9;                 } else if ((c > 0.45) && (c <= 0.50)) {                     k = 9.2;                 } else if ((c > 0.5) && (c <= 0.55)) {                     k = 9.4;                 } else if ((c > 0.55) && (c <= 0.6)) {                     k = 9.5;                 } else if ((c > 0.6) && (c <= 0.65)) {                     k = 9.7;                 } else if ((c > 0.65) && (c <= 0.7)) {                     k = 10;                 } else if ((c > 0.7) && (c <= 0.75)) {                     k = 10;                 } else if ((c > 0.75) && (c <= 0.8)) {                     k = 10.2;                 } else if ((c > 0.8) && (c <= 0.85)) {                     k = 10.5;                 } else if ((c > 0.85) && (c <= 0.9)) {                     k = 10.6;                 } else if ((c > 0.9) && (c <= 0.95)) {                     k = 11;                 } else if ((c > 0.95) && (c <= 1)) {                     k = 11;                 }             krit = (k * e) / (Math.pow((b / t), 2));              String d = valueOf(krit);             myTextField5.setText(d);             }          else if (checkbox3.isSelected()) {             if (c <= 0.1) {                 k = 4.9;             } else if ((c > 0.1) && (c <= 0.15)) {                 k = 5.1;             } else if ((c > 0.15) && (c <= 0.2)) {                 k = 5.2;             } else if ((c > 0.2) && (c <= 0.25)) {                 k = 5.5;             } else if ((c > 0.25) && (c <= 0.30)) {                 k = 5.8;             } else if ((c > 0.3) && (c <= 0.35)) {                 k = 6;             } else if ((c > 0.35) && (c <= 0.40)) {                 k = 6.2;             } else if ((c > 0.40) && (c <= 0.45)) {                 k = 6.5;             } else if ((c > 0.45) && (c <= 0.50)) {                 k = 6.9;             } else if ((c > 0.5) && (c <= 0.55)) {                 k = 7;             } else if ((c > 0.55) && (c <= 0.6)) {                 k = 7.5;             } else if ((c > 0.6) && (c <= 0.65)) {                 k = 8;             } else if ((c > 0.65) && (c <= 0.7)) {                 k = 8.2;             } else if ((c > 0.7) && (c <= 0.75)) {                 k = 8.5;             } else if ((c > 0.75) && (c <= 0.8)) {                 k = 9.1;             } else if ((c > 0.8) && (c <= 0.85)) {                 k = 9.5;             } else if ((c > 0.85) && (c <= 0.9)) {                 k = 10;             } else if ((c > 0.9) && (c <= 0.95)) {                 k = 10.5;             } else if ((c > 0.95) && (c <= 1)) {                 k = 11;             }             krit = (k * e) / (Math.pow((b / t), 2));              String d = valueOf(krit);             myTextField5.setText(d);         }         else if (checkbox4.isSelected()) {             if (c <= 0.1) {                 k = 4.8;             } else if ((c > 0.1) && (c <= 0.15)) {                 k = 5;             } else if ((c > 0.15) && (c <= 0.2)) {                 k = 5;             } else if ((c > 0.2) && (c <= 0.25)) {                 k = 5.1;             } else if ((c > 0.25) && (c <= 0.30)) {                 k = 5.2;             } else if ((c > 0.3) && (c <= 0.35)) {                 k = 5.4;             } else if ((c > 0.35) && (c <= 0.40)) {                 k = 5.5;             } else if ((c > 0.40) && (c <= 0.45)) {                 k = 5.6;             } else if ((c > 0.45) && (c <= 0.50)) {                 k = 5.9;             } else if ((c > 0.5) && (c <= 0.55)) {                 k = 6;             } else if ((c > 0.55) && (c <= 0.6)) {                 k = 6.2;             } else if ((c > 0.6) && (c <= 0.65)) {                 k = 6.5;             } else if ((c > 0.65) && (c <= 0.7)) {                 k = 6.7;             } else if ((c > 0.7) && (c <= 0.75)) {                 k = 7;             } else if ((c > 0.75) && (c <= 0.8)) {                 k = 7.1;             } else if ((c > 0.8) && (c <= 0.85)) {                 k = 7.4;             } else if ((c > 0.85) && (c <= 0.9)) {                 k = 7.8;             } else if ((c > 0.9) && (c <= 0.95)) {                 k = 8;             } else if ((c > 0.95) && (c <= 1)) {                 k = 8.3;             }             krit = (k * e) / (Math.pow((b / t), 2));             String d = valueOf(krit);             myTextField5.setText(d);          }         Double f = parseDouble(myTextField6.getText());             zapas = krit/f;             String g = valueOf(zapas);             myTextField7.setText(g);         }         }

public class AlphaNumericTextFormatter extends TextFormatter<String> {      /** The Constant ALPHA_NUMERIC_ONLY. */     //private static final String ALPHA_NUMERIC_ONLY = "^[a-zA-Z0-9]*$";     /** MAKE NUMERIC ONLY **/     private static final String DIGITS_ONLY = "^[0-9.]*$";      /**      * Instantiates a new alpha numeric text formatter.      */     public AlphaNumericTextFormatter() {         super(applyFilter(null));     }      /**      * Instantiates a new alpha numeric text formatter.      *      * @param maxLength      *            the max length      */     public AlphaNumericTextFormatter(int maxLength) {         super(applyFilter(new MaxLengthTextFormatter(maxLength).getFilter()));     }      /**      * Apply filter.      *      * @param filter      *            the filter      * @return the unary operator      */     private static UnaryOperator<Change> applyFilter(UnaryOperator<Change> filter) {         return change -> {             if (change.getControlNewText() != null && change.getControlNewText().matches(DIGITS_ONLY)) {                 if (filter != null) {                     filter.apply(change);                 }                 return change;             }             return null;         };     }  } 

 package sample;  import java.util.function.UnaryOperator; import javafx.scene.control.TextFormatter; import javafx.scene.control.TextFormatter.Change;  public class MaxLengthTextFormatter extends TextFormatter<String> {     private int maxLength;      public MaxLengthTextFormatter(final int maxLength) {         super(new UnaryOperator<Change>() {             public Change apply(Change change) {                 if (change.isDeleted()) {                     if (change.getControlNewText().length() > maxLength) {                         change.setText(change.getText().substring(0, maxLength));                     }                 } else if (change.getControlText().length() + change.getText().length() >= maxLength) {                     int maxPos = maxLength - change.getControlText().length();                     change.setText(change.getText().substring(0, maxPos));                 }                  return change;             }         });         this.maxLength = maxLength;     }      public int getMaxLength() {         return this.maxLength;     } }