Question

Please Help, JavaFX assignment.

This assignment will focus on the use anonymous inner class handlers to implement event handling.

Assignment 12

Assignment 12 Submission

Follow the directions below to submit Assignment 12: This assignment will be a modification of the Assignment 11 program. This program should use the controls and layouts from the previous assignment. No controls or layouts should be added or removed for this assignment. Add event handlers for the three buttons. The event handlers should be implemented as anonymous inner class handlers. An example of anonymous inner class handlers can be found in section 15.5 of the textbook. The event handler for the encrypt button should call the encryptString() method in the EncryptString class. The input text should be passed to the encryptString() method and the value returned should be displayed in the output TextArea field. The event handler for the clear button should clear any text in the input TextArea and the output TextArea. The event handler for the decrypt button should call the decryptString() method in the EncryptString class. The input text should be passed to the decryptString() method and the value returned should be displayed in the output TextArea field.

import javafx.application.Application;

import javafx.scene.Scene;

import javafx.scene.control.*;

import javafx.scene.layout.*;

import javafx.stage.Stage;

import javafx.geometry.*;

public class JavaFX extends Application {

@Override

public void start(Stage primaryStage) throws Exception {

//creates title of primary stage
primaryStage.setTitle("GridPane Experiment");

//creating labels

Button encrypt = new Button("Encrypt");

Button clear = new Button("Clear");

Button decrypt = new Button("Decrypt");

Label inputLabel = new Label("Input Text");

Label outputLabel = new Label("Output Text");

TextArea inputText = new TextArea("Input text here");

TextArea outputText = new TextArea("Output text here");

//Creates a Flow Pane

FlowPane flowpane = new FlowPane();

//Setting the horizontal gap
flowpane.setHgap(5);

flowpane.setPadding(new Insets(1, 10, 10, 10));

flowpane.getChildren().add(encrypt);

flowpane.getChildren().add(clear);

flowpane.getChildren().add(decrypt);

//Setting the Flow alignment

flowpane.setAlignment(Pos.CENTER);

GridPane gridPane = new GridPane();

//Setting the vertical gap between the columns

gridPane.setVgap(5);

//Set the using Insets class

gridPane.setPadding(new Insets(10, 10, 10, 10));

//Arranging all the nodes in the grid

gridPane.add(inputLabel, 0, 0, 1, 1);

gridPane.add(inputText, 0, 1, 1, 1);

gridPane.add(flowpane, 0, 2, 1, 1);

gridPane.add(outputLabel, 0, 3, 1, 1);

gridPane.add(outputText, 0, 4, 1, 1);

//Sets size for the pane

Scene scene = new Scene(gridPane, 500, 450);

primaryStage.setScene(scene);

primaryStage.show();

}

public static void main(String[] args) {

Application.launch(args);

}

}

Answer 1

You haven't provided the EncryptString Class, Any way I have written the instruction in comment where you have to call the encrypt and decrypt method from that class.
You will get the output as per the string returned from the EncryptString class when you call the corresponding method to get the string. Please refer th instructions in bold strings

OUTPUT:

CODE:

package javafx.application;

import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.*;
import javafx.stage.Stage;
import javafx.geometry.*;

public class JavaFX extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {
        //creates title of primary stage
        primaryStage.setTitle("GridPane Experiment");
        //creating labels
        Button encrypt = new Button("Encrypt");

        Button clear = new Button("Clear");
        Button decrypt = new Button("Decrypt");
        Label inputLabel = new Label("Input Text");
        Label outputLabel = new Label("Output Text");
        TextArea inputText = new TextArea("Input text here");
        TextArea outputText = new TextArea("Output text here");

        encrypt.setOnMouseClicked( event-> {
            //read text from input text area
            String text = inputText.getText();
            //Call encrypt method from class EncryptClass
            String text2 = encryptString(text);
            //Set encrypted text to output
            outputText.setText(text2);
        });
        decrypt.setOnMouseClicked(event -> {
            //read text from input text area
            String text = inputText.getText();
            //Call encrypt method from class EncryptClass
            String text2 = decryptString(text);
            //Set Decrypted text to output
            outputText.setText(text2);
        });


        clear.setOnMouseClicked(event -> {
            //Clear input and output text Area
            inputText.clear();
            outputText.clear();
        });
        //Creates a Flow Pane
        FlowPane flowpane = new FlowPane();
        //Setting the horizontal gap
        flowpane.setHgap(5);
        flowpane.setPadding(new Insets(1, 10, 10, 10));
        flowpane.getChildren().add(encrypt);
        flowpane.getChildren().add(clear);
        flowpane.getChildren().add(decrypt);
        //Setting the Flow alignment
        flowpane.setAlignment(Pos.CENTER);
        GridPane gridPane = new GridPane();
        //Setting the vertical gap between the columns
        gridPane.setVgap(5);
        //Set the using Insets class
        gridPane.setPadding(new Insets(10, 10, 10, 10));
        //Arranging all the nodes in the grid
        gridPane.add(inputLabel, 0, 0, 1, 1);
        gridPane.add(inputText, 0, 1, 1, 1);
        gridPane.add(flowpane, 0, 2, 1, 1);
        gridPane.add(outputLabel, 0, 3, 1, 1);
        gridPane.add(outputText, 0, 4, 1, 1);
        //Sets size for the pane
        Scene scene = new Scene(gridPane, 500, 450);
        primaryStage.setScene(scene);
        primaryStage.show();

    }
    public String encryptString(String text){
        // You need to add code to call encrypt method from class EncryptString on string text
        // then return that encrypted string
        return "Encrypted " + text;
    }

    public String decryptString(String text){
        // You need to add code to call decrypt method from class EncryptString on string text
        // then return that decrypted string
        return "decrypted " + text;
    }

    public static void main(String[] args) {
        Application.launch(args);
    }

}