МІНІСТЕРСТВО ОСВІТИ І НАУКИ УКРАЇНИ Національний університет “Львівська політехніка” / Розрахункова графічна робота З курсу «Об’єктно-орієнтоване програмування» 1. ЗАВДАННЯ ДО ЛАБОРАТОРНОЇ РОБОТИ Розробити програму додаток калькулятор використовуючи засоби бібліотеку JavaFX. Ця програма додаток повинна містити такі операції: додавання, віднімання, множення, ділення, дорівнює, “backspace”. В меню повинні бути реалізовані такі пункти: Файл, Редагування, Вид, Довідка. В підменю Файл: відкрити, вихід(пункт вихід відокремити розділовою лінією). В підменю Редагування: копіювати, вставити, вирізати. В підменю Вид: звичайний, інженерний. В підменю Довідка: Про програму. Для кожного пункту меню реалізувати мнемонічні операції та для пунктів підменю оперативні кнопки. Реалізувати спливаючі підказки для кожної кнопки. При написанні коду програми використовувати виключні ситуації, а також основні методи прокоментувати англійською мовою. Варіант 6 x^4 M+ MC Cos min(String x, String y) Знайти значення типу float та зменшити на 31. Відсортувати колонку зі значеннями по зростанні Текст програми SimpleCalculatorPane.java import javafx.embed.swing.JFXPanel; import javafx.geometry.Insets; import javafx.geometry.Pos; import javafx.scene.control.Button; import javafx.scene.control.ContentDisplay; import javafx.scene.control.TextField; import javafx.scene.control.Tooltip; import javafx.scene.layout.BorderPane; import javafx.scene.layout.GridPane; import javafx.scene.layout.VBox; public class SimpleCalculatorPane extends CalculatorPane{ JFXPanel fxPanel = new JFXPanel(); public SimpleCalculatorPane(){ // Create a GridPane as the root layout node GridPane window1 = new GridPane(); window1.setPadding(new Insets(5)); window1.setHgap(5); window1.setVgap(5); // Create a BorderPane for the calculator BorderPane windowContent = new BorderPane(); // Create the display field and place it at the Top area of the window displayField = new TextField(); displayField.setAlignment(Pos.BASELINE_RIGHT); windowContent.setTop(displayField); //set a background of window String backgroundStyle = "-fx-background-color: lightgreen;" + "-fx-background-radius: 30%;" + "-fx-background-inset: 5px;"; windowContent.setStyle(backgroundStyle); // Create the components button0 = new Button("0"); button1 = new Button("1"); button2 = new Button("2"); button3 = new Button("3"); button4 = new Button("4"); button5 = new Button("5"); button6 = new Button("6"); button7 = new Button("7"); button8 = new Button("8"); button9 = new Button("9"); buttonPoint = new Button("."); buttonEqual = new Button("="); buttonPlus = new Button("+"); buttonMinus = new Button("-"); buttonMult = new Button("*"); buttonDiv = new Button("/"); buttonSQRT = new Button("sqrt"); buttonMOD = new Button("%"); buttonINV = new Button("1/x"); buttonOPP = new Button("+/-"); buttonLOG = new Button(">>3"); buttonCOS = new Button("Cos"); buttonMIN = new Button("Max"); buttonWInt = new Button("WInt"); buttonWFlt = new Button("WFlt"); buttonWDbl = new Button("WDbl"); buttonWChr= new Button("WChr"); buttonBackspace = new Button("Backspace"); buttonCE = new Button("CE"); buttonC = new Button("C"); buttonMC = new Button("MC"); buttonMR = new Button("MR"); buttonMS = new Button("MS"); buttonMPlus = new Button("M+"); // Set a large preferred size of the buttons, so that they fill the whole space //in their container button0.setPrefSize(800, 800); button1.setPrefSize(800, 800); button2.setPrefSize(800, 800); button3.setPrefSize(800, 800); button4.setPrefSize(800, 800); button5.setPrefSize(800, 800); button6.setPrefSize(800, 800); button7.setPrefSize(800, 800); button8.setPrefSize(800, 800); button9.setPrefSize(800, 800); buttonPoint.setPrefSize(800, 800); buttonEqual.setPrefSize(800, 800); buttonPlus.setPrefSize(80, 800); buttonMinus.setPrefSize(80, 800); buttonMult.setPrefSize(80, 800); buttonDiv.setPrefSize(80, 800); // Create a GridPane node to hold 12 buttons � //10 numeric ones, period, and the equal sign GridPane gridPane = new GridPane(); // Add buttons to the gridPane gridPane.add(button0,0,0); gridPane.add(button1,1,0); gridPane.add(button2,2,0); gridPane.add(button3,0,1); gridPane.add(button4,1,1); gridPane.add(button5,2,1); gridPane.add(button6,0,2); gridPane.add(button7,1,2); gridPane.add(button8,2,2); gridPane.add(button9,0,3); gridPane.add(buttonPoint,1,3); gridPane.add(buttonEqual,2,3); // Create a VBox and add Plus, Minus, Mult, Div buttons to it VBox operations = new VBox(); operations.getChildren().add(buttonPlus); operations.getChildren().add(buttonMinus); operations.getChildren().add(buttonMult); operations.getChildren().add(buttonDiv); // Place the gridPane with buttons at the Center of the window(BorderPane) windowContent.setCenter(gridPane); // Place the VBox with operation buttons (Plus, Minus, Div, Mult) //at the Right area of the border pane windowContent.setRight(operations); window1.add(windowContent, 0, 1); getChildren().add(window1); } } EngineerCalculatorPane.java import javafx.embed.swing.JFXPanel; import javafx.geometry.HPos; import javafx.geometry.Insets; import javafx.geometry.Pos; import javafx.geometry.VPos; import javafx.scene.control.Button; import javafx.scene.control.ContentDisplay; import javafx.scene.control.TextField; import javafx.scene.control.Tooltip; import javafx.scene.layout.GridPane; import javafx.scene.layout.Priority; public class EngineerCalculatorPane extends CalculatorPane{ JFXPanel fxPanel = new JFXPanel(); private final double BUTTON_PREF_WIDTH = 800; private final double BUTTON_PREF_HEIGHT = 800; { buttonWInt = new Button("WInt"); buttonWFlt = new Button("WFlt"); buttonWDbl = new Button("WDbl"); buttonWChr= new Button("WChr"); } public EngineerCalculatorPane(){ super(); // Create a GridPane as the root layout node GridPane windowContent = new GridPane(); windowContent.setPadding(new Insets(5)); windowContent.setHgap(5); windowContent.setVgap(5); buttonWInt.setStyle("" + "-fx-font-size: 12px;" + "-fx-font-weight: bold;"); buttonWFlt.setStyle("" + "-fx-font-size: 12px;" + "-fx-font-weight: bold;"); buttonWDbl.setStyle("" + "-fx-font-size: 11px;" + "-fx-font-weight: bold;"); buttonWChr.setStyle("" + "-fx-font-size: 11px;" + "-fx-font-weight: bold;"); // Create the display field and set the corresponding constraints displayField = new TextField(); displayField.setAlignment(Pos.BASELINE_RIGHT); GridPane.setColumnSpan(displayField, 7); // this cell is as wide as 6 other ones GridPane.setRowSpan(displayField, 1); // this cell has the same height as other cells GridPane.setFillHeight(displayField, true); GridPane.setFillWidth(displayField, true); // fill all space in the cell GridPane.setHalignment(displayField, HPos.CENTER); GridPane.setValignment(displayField, VPos.CENTER); // position within the cell GridPane.setHgrow(displayField, Priority.ALWAYS); GridPane.setVgrow(displayField, Priority.ALWAYS); // grow larger than the preferred size if there is space // Add the display field to the window windowContent.add(displayField, 0, 1); // Create the buttons button0 = new Button("0"); button1 = new Button("1"); button2 =new Button("2"); button3 = new Button("3"); button4 = new Button("4"); button5 = new Button("5"); button6 = new Button("6"); button7 = new Button("7"); button8 = new Button("8"); button9 = new Button("9"); buttonPoint = new Button("."); buttonEqual = new Button("="); buttonPlus = new Button("+"); buttonMinus = new Button("-"); buttonMult = new Button("*"); buttonDiv = new Button("/"); buttonSQRT = new Button("sqrt"); buttonMOD = new Button("%"); buttonINV = new Button("1/x"); buttonOPP = new Button("+/-"); buttonLOG = new Button("x^4"); buttonCOS = new Button("Cos"); buttonMIN = new Button("Min"); buttonBackspace = new Button("Backspace"); buttonCE = new Button("CE"); buttonC = new Button("C"); buttonMC = new Button("MC"); buttonMR = new Button("MR"); buttonMS = new Button("MS"); buttonMPlus = new Button("M+"); // Set a large preferred size of the buttons, // so that they fill the whole space // in their container button0.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); button1.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); button2.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); button3.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); button4.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); button5.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); button6.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); button7.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); button8.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); button9.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonPoint.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonEqual.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonPlus.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonMinus.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonMult.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonDiv.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonMC.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonMR.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonMS.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonMPlus.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonSQRT.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonMOD.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonINV.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonOPP.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonLOG.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonCOS.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonMIN.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonMS.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonWChr.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonWDbl.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonWFlt.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonWInt.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); buttonBackspace.setPrefSize(200, 800); buttonCE.setPrefSize(200, 800); buttonC.setPrefSize(200, 800); // Add the buttons to the window windowContent.add(button0,1,6); windowContent.add(button1,1,5); windowContent.add(button2,2,5); windowContent.add(button3,3,5); windowContent.add(button4,1,4); windowContent.add(button5,2,4); windowContent.add(button6,3,4); windowContent.add(button7,1,3); windowContent.add(button8,2,3); windowContent.add(button9,3,3); windowContent.add(buttonPoint,3,6); windowContent.add(buttonSQRT,5,3); windowContent.add(buttonMOD,5,4); windowContent.add(buttonINV,5,5); windowContent.add(buttonEqual,5,6); windowContent.add(buttonOPP, 2, 6); windowContent.add(buttonLOG, 6, 3); windowContent.add(buttonCOS, 6, 4); windowContent.add(buttonMIN, 6, 5); windowContent.add(buttonWInt, 11, 3); windowContent.add(buttonWFlt, 11, 4); windowContent.add(buttonWDbl, 11, 5); windowContent.add(buttonWChr, 11, 6); GridPane.setRowIndex(buttonPlus, 6); GridPane.setColumnIndex(buttonPlus, 4); GridPane.setRowIndex(buttonMinus, 5); GridPane.setColumnIndex(buttonMinus, 4); GridPane.setRowIndex(buttonMult, 4); GridPane.setColumnIndex(buttonMult, 4); GridPane.setRowIndex(buttonDiv, 3); GridPane.setColumnIndex(buttonDiv, 4); windowContent.getChildren().addAll(buttonPlus, buttonMinus, buttonMult, buttonDiv); // First column GridPane.setRowIndex(buttonMC, 3); GridPane.setColumnIndex(buttonMC, 0); buttonMC.setPrefSize(BUTTON_PREF_WIDTH, BUTTON_PREF_HEIGHT); GridPane.setRowIndex(buttonMR, 4); GridPane.setColumnIndex(buttonMR, 0); GridPane.setRowIndex(buttonMS, 5); GridPane.setColumnIndex(buttonMS, 0); GridPane.setRowIndex(buttonMPlus, 6); GridPane.setColumnIndex(buttonMPlus, 0); windowContent.getChildren().addAll(buttonMC, buttonMR, buttonMS, buttonMPlus); // First row GridPane.setHalignment(buttonBackspace, HPos.LEFT); GridPane.setColumnSpan(buttonBackspace, 2); GridPane.setFillHeight(buttonBackspace, true); GridPane.setFillWidth(buttonBackspace, true); // fill all space in the cell GridPane.setHgrow(buttonBackspace, Priority.ALWAYS); GridPane.setVgrow(buttonBackspace, Priority.ALWAYS); GridPane.setMargin(buttonBackspace, new Insets(2,40,2,2)); windowContent.add(buttonBackspace, 1, 2); GridPane.setHalignment(buttonCE, HPos.CENTER); GridPane.setColumnSpan(buttonCE, 3); GridPane.setMargin(buttonCE, new Insets(2,40,2,40)); windowContent.add(buttonCE, 2, 2); GridPane.setHalignment(buttonC, HPos.RIGHT); GridPane.setColumnSpan(buttonC, 2); GridPane.setMargin(buttonC, new Insets(2,2,2,40)); windowContent.add(buttonC, 4, 2); getChildren().add(windowContent); } } CalculatorPane.java import javafx.scene.control.Button; import javafx.scene.control.TextField; import javafx.scene.control.Tooltip; import javafx.scene.layout.StackPane; import javafx.scene.text.Text; import java.io.BufferedWriter; import java.io.FileWriter; import java.io.IOException; import java.util.ArrayList; import java.util.Collections; import java.util.List; public abstract class CalculatorPane extends StackPane { private String firstNumber; private String operator; // selected action private double result; private boolean memoryCellIsEmpty = true; private double memoryCell = 0; private String previouslyPressedButton = ""; protected Button buttonWInt; protected Button buttonWFlt; protected Button buttonWDbl; protected Button buttonWChr; private String secondNumber; private int numberi; private double numberd; private float numberf; private char numberc; public Text memoryIndicator; BufferedWriter writeTablein = null; BufferedWriter writeTableout = null; List<Integer> column1 = new ArrayList<Integer>(10); // Defining an integer Array List List<Float> column2 = new ArrayList<Float>(10); // Defining an float Array List List<Double> column3 = new ArrayList<Double>(10); // Defining an double Array List List<Character> column4 = new ArrayList<Character>(10); // Defining an char Array List public void handle(CalculatorEngine engine) { button0.setOnAction((e) -> engine.processEvent(e, this)); button1.setOnAction((e) -> engine.processEvent(e, this)); button2.setOnAction((e) -> engine.processEvent(e, this)); button3.setOnAction((e) -> engine.processEvent(e, this)); button4.setOnAction((e) -> engine.processEvent(e, this)); button5.setOnAction((e) -> engine.processEvent(e, this)); button6.setOnAction((e) -> engine.processEvent(e, this)); button7.setOnAction((e) -> engine.processEvent(e, this)); button8.setOnAction((e) -> engine.processEvent(e, this)); button9.setOnAction((e) -> engine.processEvent(e, this)); buttonPoint.setOnAction((e) -> engine.processEvent(e, this)); buttonEqual.setOnAction((e) -> engine.processEvent(e, this)); buttonPlus.setOnAction((e) -> engine.processEvent(e, this)); buttonMinus.setOnAction((e) -> engine.processEvent(e, this)); buttonMult.setOnAction((e) -> engine.processEvent(e, this)); buttonDiv.setOnAction((e) -> engine.processEvent(e, this)); buttonSQRT.setOnAction((e) -> engine.processEvent(e, this)); buttonMOD.setOnAction((e) -> engine.processEvent(e, this)); buttonINV.setOnAction((e) -> engine.processEvent(e, this)); buttonOPP.setOnAction((e) -> engine.processEvent(e, this)); buttonLOG.setOnAction((e) -> engine.processEvent(e, this)); buttonCOS.setOnAction((e) -> engine.processEvent(e, this)); buttonMIN.setOnAction((e) -> engine.processEvent(e, this)); buttonBackspace.setOnAction((e) -> engine.processEvent(e, this)); buttonCE.setOnAction((e) -> engine.processEvent(e, this)); buttonC.setOnAction((e) -> engine.processEvent(e, this)); buttonMC.setOnAction((e) -> engine.processEvent(e, this)); buttonMR.setOnAction((e) -> engine.processEvent(e, this)); buttonMS.setOnAction((e) -> engine.processEvent(e, this)); buttonMPlus.setOnAction((e) -> engine.processEvent(e, this)); buttonWInt.setOnAction((e) -> engine.processEvent(e, this)); buttonWFlt.setOnAction((e) -> engine.processEvent(e, this)); buttonWDbl.setOnAction((e) -> engine.processEvent(e, this)); buttonWChr.setOnAction((e) -> engine.processEvent(e, this)); } // Declare all calculator's components. protected TextField displayField; protected Button button0; protected Button button1; protected Button button2; protected Button button3; protected Button button4; protected Button button5; protected Button button6; protected Button button7; protected Button button8; protected Button button9; protected Button buttonPoint; protected Button buttonEqual; protected Button buttonPlus; protected Button buttonMinus; protected Button buttonMult; protected Button buttonDiv; protected Button buttonSQRT; protected Button buttonMOD; protected Button buttonINV; protected Button buttonOPP; protected Button buttonLOG; protected Button buttonCOS; protected Button buttonMIN; protected Button buttonBackspace; protected Button buttonCE; protected Button buttonC; protected Button buttonMC; protected Button buttonMR; protected Button buttonMS; Button buttonMPlus; // Constructor public CalculatorPane() { super(); String backgroundStyle = "-fx-background-color: grey;" + "-fx-background-inset: 10px;"; super.setStyle(backgroundStyle); setStyle(backgroundStyle); } // Define getter and setters public String getDisplayValue() { return displayField.getText(); } public void setDisplayValue(String val) { String textColor = " -fx-text-fill: black"; displayField.setStyle(textColor); displayField.setText(val); } public void setDisplayValue(String val, String color) { String textColor = " -fx-text-fill: " + color; displayField.setStyle(textColor); displayField.setText(val); } public String getFirstNumber() { return firstNumber; } public void setFirstNumber(String firstNumber) { this.firstNumber = firstNumber; } public String getOperator() { return operator; } public void setOperator(String operator) { this.operator = operator; } public double getResult() { return result; } public double clearMemory() { memoryCell = 0; return memoryCell; } public double getMemory() { return memoryCell; } public void setMemory(double memoryCell) { this.memoryCell = memoryCell; } public void setResult(double result) { this.result = result; } public String getPreviouslyPressedButton() { return previouslyPressedButton; } public void setPreviouslyPressedButton(String previouslyPressedButton) { this.previouslyPressedButton = previouslyPressedButton; } public void writeInt(String firstNumber) { this.firstNumber = firstNumber; numberi = Integer.parseInt(firstNumber); try{ column1.add(numberi);} catch (IndexOutOfBoundsException exception) { setDisplayValue(String.valueOf(exception));} } public void writeFloat(String firstNumber) { this.firstNumber = firstNumber; //setting type of chars numberf = Float.parseFloat(firstNumber); column2.add(numberf); } public void writeDouble(String firstNumber) { this.firstNumber = firstNumber; //setting type of chars numberd = Double.parseDouble(firstNumber); column3.add(numberd); } public void writeChar(String firstNumber) { this.firstNumber = firstNumber; numberc = firstNumber.charAt(0); column4.add(numberc); } public void write() { try { writeTablein = new BufferedWriter(new FileWriter("C:\\Users\\INTEL-Book\\Desktop\\in.txt")); for (int i = 0; i < column1.size(); i++) { writeTablein.write(column1.get(i) + "\t" + column2.get(i) + "\t" + column3.get(i) + "\t" + column4.get(i)); writeTablein.newLine(); } } catch (IOException exception) { System.err.println(exception); } catch (IndexOutOfBoundsException exception) { System.err.println(exception); } finally { if (writeTablein != null) { try { writeTablein.close(); } catch (IOException e) { System.err.println(e); } } } try{ for (int i = 0; i < column2.size(); i++) { column2.set(i, column2.get(i) - 31); } Collections.sort(column2); try { writeTableout = new BufferedWriter(new FileWriter("C:\\Users\\INTEL-Book\\Desktop\\out.txt")); for (int i = 0; i < column1.size(); i++) { writeTableout.write(column1.get(i) + "\t" + column2.get(i) + "\t" + column3.get(i) + "\t" + column4.get(i)); writeTableout.newLine(); } } catch (IOException exception) { System.err.println(exception); } } catch (IndexOutOfBoundsException exception) { System.err.println(exception); } finally { if (writeTableout != null) { try { writeTableout.close(); } catch (IOException e) { System.err.println(e); } } } } public void clearAll() { displayField.setText("0"); column1.clear(); column2.clear(); column3.clear(); column4.clear(); } protected void setButtonStyles(String style) { button0.setId(style); button1.setId(style); button2.setId(style); button3.setId(style); button4.setId(style); button5.setId(style); button6.setId(style); button7.setId(style); button8.setId(style); button9.setId(style); buttonPoint.setId(style); buttonEqual.setId(style); buttonPlus.setId(style); buttonMinus.setId(style); buttonMult.setId(style); buttonDiv.setId(style); buttonSQRT.setId(style); buttonMOD.setId(style); buttonINV.setId(style); buttonOPP.setId(style); buttonLOG.setId(style); buttonCOS.setId(style); buttonMIN.setId(style); buttonBackspace.setId(style); buttonCE.setId(style); buttonC.setId(style); buttonMC.setId(style); buttonMR.setId(style); buttonMS.setId(style); buttonMPlus.setId(style); }} CalculatorEngine.java import javafx.event.ActionEvent;@FunctionalInterfacepublic interface CalculatorEngine { void processEvent(ActionEvent e, CalculatorPane parent);} Main.java import javafx.application.Application;import javafx.beans.property.ReadOnlyDoubleProperty;import javafx.embed.swing.JFXPanel;import javafx.event.ActionEvent;import javafx.scene.Scene;import javafx.scene.control.*;import javafx.scene.input.KeyCode;import javafx.scene.input.KeyCodeCombination;import javafx.scene.input.KeyCombination;import javafx.scene.layout.GridPane;import javafx.scene.paint.Color;import javafx.stage.FileChooser;import javafx.stage.FileChooserBuilder;import javafx.stage.Stage;import javax.swing.*;import java.io.BufferedReader;import java.io.File;import java.io.FileReader;public class Main extends Application { GridPane window; Stage primaryStage; final Stage link = primaryStage; TextArea fileTextArea = new TextArea(); private static SimpleCalculatorPane simpleCalculatorPane = new SimpleCalculatorPane(); private static EngineerCalculatorPane engineerCalculatorPane = new EngineerCalculatorPane(); public StringBuilder readFile(File selectedFile) { StringBuilder sb = new StringBuilder(1024); String curLine = ""; try { FileReader fr = new FileReader(selectedFile); BufferedReader br = new BufferedReader(fr); while (curLine != null) { curLine = br.readLine(); sb.append(curLine).append("\n"); } } catch (Exception e) { e.getMessage(); } return sb; } /////////MENU BAR////////// public MenuBar buildMenuBarWithMenus1(final ReadOnlyDoubleProperty menuWidthProperty) { final MenuBar menuBar1 = new MenuBar(); /////////FILE MENU////////// final Menu fileMenu = new Menu("_File"); fileMenu.setMnemonicParsing(true); final MenuItem openMenuItem = MenuItemBuilder.create() .text("Open") .onAction( (Event -> { String currentDir = System.getProperty("user.dir") + File.separator; StringBuilder sb = null; FileChooserBuilder fcb = FileChooserBuilder.create(); FileChooser fc = fcb.title("Open Dialog").initialDirectory(new File(currentDir)).build(); File selectedFile = fc.showOpenDialog(link); sb = readFile(selectedFile); fileTextArea.setText(sb.toString()); })) .accelerator( new KeyCodeCombination( KeyCode.O, KeyCombination.CONTROL_DOWN)) .build(); fileMenu.getItems().add(openMenuItem); fileMenu.getItems().add(new SeparatorMenuItem()); final MenuItem exitMenuItem = MenuItemBuilder.create() .text("Exit") .onAction( e -> System.exit(0)) .accelerator( new KeyCodeCombination( KeyCode.E, KeyCombination.CONTROL_DOWN)) .build(); fileMenu.getItems().add(exitMenuItem); menuBar1.getMenus().add(fileMenu); /////////EDIT MENU////////// final Menu editMenu = new Menu("_Edit"); editMenu.setMnemonicParsing(true); final MenuItem copyMenuItem = MenuItemBuilder.create() .text("Copy") .onAction( e -> System.out.println() ) .accelerator( new KeyCodeCombination( KeyCode.C, KeyCombination.CONTROL_DOWN)) .build(); editMenu.getItems().add(copyMenuItem); final MenuItem pasteMenuItem = MenuItemBuilder.create() .text("Paste") .onAction( e -> System.out.println()) .accelerator