Question

Create a JavaFX application that uses a TextField to get a message and encode or decode it using
the classes . Use four buttons to control the kind of cipher used and to specify
whether to encode or decode the message. Also, use a TextField to get the number used in the
constructor for the ciphers.

Answer 1

Note: As encryption and decryption classes were not given so I have used sample classes. You have to change that.

Please comment for further help and please uprate.

Download Code:

https://drive.google.com/open?id=1d_iJB3z6jn3W8x6J3GCN2SvmmaPf4kBc

MAIN.java

import java.io.IOException;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;

public class MAIN extends Application {
  
@Override
public void start(Stage primaryStage) {
   try {
           Pane mainPane =(Pane) FXMLLoader.load(MAIN.class.getResource("Sample.fxml"));
           primaryStage.setScene(new Scene(mainPane));
           primaryStage.show();
   } catch (IOException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
}
public static void main(String[] args) {
launch(args);
}
}

Controller.java

import java.net.URL;
import java.util.ResourceBundle;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;

public class Controller {

@FXML
private ResourceBundle resources;

@FXML
private URL location;

@FXML
private TextField FxKeyFld;

@FXML
private Label FxResultlbl;

@FXML
private Button fxDecAff;

@FXML
private Button fxEncAff;

@FXML
private Button fxEncCae;

@FXML
private Button fxEncdec;

@FXML
private TextField fxMessageFld;

@FXML
void decryptAffine(ActionEvent event) {
   int key = Integer.parseInt(FxKeyFld.getText());
   String message = fxMessageFld.getText();
   Affine c=new Affine(key);
   FxResultlbl.setText(c.decryptionMessage(message));
}

@FXML
void decryptCaesar(ActionEvent event) {
   int key = Integer.parseInt(FxKeyFld.getText());
   String message = fxMessageFld.getText();
   Caesar c=new Caesar(key);
   FxResultlbl.setText(c.decrypt(message));
}

@FXML
void encryptAffine(ActionEvent event) {
   int key = Integer.parseInt(FxKeyFld.getText());
   String message = fxMessageFld.getText();
   Affine c=new Affine(key);
   FxResultlbl.setText(c.encryptionMessage(message));
}

@FXML
void encryptCaesar(ActionEvent event) {
   int key = Integer.parseInt(FxKeyFld.getText());
   String message = fxMessageFld.getText();
   Caesar c=new Caesar(key);
   FxResultlbl.setText(c.encrypt(message));
}

@FXML
void initialize() {
assert FxKeyFld != null : "fx:id=\"FxKeyFld\" was not injected: check your FXML file 'Sample.fxml'.";
assert FxResultlbl != null : "fx:id=\"FxResultlbl\" was not injected: check your FXML file 'Sample.fxml'.";
assert fxDecAff != null : "fx:id=\"fxDecAff\" was not injected: check your FXML file 'Sample.fxml'.";
assert fxEncAff != null : "fx:id=\"fxEncAff\" was not injected: check your FXML file 'Sample.fxml'.";
assert fxEncCae != null : "fx:id=\"fxEncCae\" was not injected: check your FXML file 'Sample.fxml'.";
assert fxEncdec != null : "fx:id=\"fxEncdec\" was not injected: check your FXML file 'Sample.fxml'.";
assert fxMessageFld != null : "fx:id=\"fxMessageFld\" was not injected: check your FXML file 'Sample.fxml'.";

}

}

Sample.fxml

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

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

<AnchorPane id="AnchorPane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="360.00022207031" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="Controller">
<children>
<Label layoutX="31.0" layoutY="67.0" text="Text" />
<TextField fx:id="fxMessageFld" layoutX="132.0" layoutY="64.0" prefWidth="200.0" />
<Label layoutX="31.0" layoutY="109.0" text="Key" />
<TextField fx:id="FxKeyFld" layoutX="132.0" layoutY="106.0" prefWidth="200.0" />
<Label layoutX="31.0" layoutY="160.0" text="Result" />
<Label fx:id="FxResultlbl" layoutX="132.0" layoutY="160.0" text="..." textFill="#0c9900" />
<Button fx:id="fxEncCae" layoutX="36.0" layoutY="228.0" mnemonicParsing="false" onAction="#encryptCaesar" text="Encrypt Caesar" />
<Button fx:id="fxEncAff" layoutX="36.0" layoutY="285.0" mnemonicParsing="false" onAction="#encryptAffine" prefWidth="98.0" text="Encrypt Affine" />
<Button fx:id="fxDecAff" layoutX="224.0" layoutY="285.0" mnemonicParsing="false" onAction="#decryptAffine" prefWidth="98.0" text="Decypt Affine" />
<Button fx:id="fxEncdec" layoutX="224.0" layoutY="227.0" mnemonicParsing="false" onAction="#decryptCaesar" text="Decrypt Caesar" />
</children>
</AnchorPane>

Output: