I need to create a security feature for my Javafx Login Gui Application. I need to enforce unsucessful login attemps by limiting 3 max unsuccessful log ons then system will automatically lock the login account.

package sdev425_2;

import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.geometry.Pos; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.control.Label; import javafx.scene.control.PasswordField; import javafx.scene.control.TextField; import javafx.scene.layout.GridPane; import javafx.scene.paint.Color; import javafx.scene.text.Text; import javafx.stage.Stage;

/** * * @author jim Adopted from Oracle's Login Tutorial Application * https://docs.oracle.com/javafx/2/get_started/form.htm */ public class SDEV425_2 extends Application {

@Override public void start(Stage primaryStage) { primaryStage.setTitle("SDEV425 Login"); // Grid Pane divides your window into grids GridPane grid = new GridPane(); // Align to Center // Note Position is geometric object for alignment grid.setAlignment(Pos.CENTER); // Set gap between the components // Larger numbers mean bigger spaces grid.setHgap(10); grid.setVgap(10);

// Create some text to place in the scene Text scenetitle = new Text("Welcome. Login to continue."); // Add text to grid 0,0 span 2 columns, 1 row grid.add(scenetitle, 0, 0, 2, 1);

// Create Label Label userName = new Label("User Name:"); // Add label to grid 0,1 grid.add(userName, 0, 1);

// Create Textfield TextField userTextField = new TextField(); // Add textfield to grid 1,1 grid.add(userTextField, 1, 1);

// Create Label Label pw = new Label("Password:"); // Add label to grid 0,2 grid.add(pw, 0, 2);

// Create Passwordfield PasswordField pwBox = new PasswordField(); // Add Password field to grid 1,2 grid.add(pwBox, 1, 2);

// Create Login Button Button btn = new Button("Login"); // Add button to grid 1,4 grid.add(btn, 1, 4);

final Text actiontarget = new Text(); grid.add(actiontarget, 1, 6);

// Set the Action when button is clicked btn.setOnAction(new EventHandler() {

@Override public void handle(ActionEvent e) { // Authenticate the user boolean isValid = authenticate(userTextField.getText(), pwBox.getText()); // If valid clear the grid and Welcome the user if (isValid) { grid.setVisible(false); GridPane grid2 = new GridPane(); // Align to Center // Note Position is geometric object for alignment grid2.setAlignment(Pos.CENTER); // Set gap between the components // Larger numbers mean bigger spaces grid2.setHgap(10); grid2.setVgap(10); Text scenetitle = new Text("Welcome " + userTextField.getText() + "!"); // Add text to grid 0,0 span 2 columns, 1 row grid2.add(scenetitle, 0, 0, 2, 1); Scene scene = new Scene(grid2, 500, 400); primaryStage.setScene(scene); primaryStage.show(); // If Invalid Ask user to try again } else { final Text actiontarget = new Text(); grid.add(actiontarget, 1, 6); actiontarget.setFill(Color.FIREBRICK); actiontarget.setText("Please try again."); }

} }); // Set the size of Scene Scene scene = new Scene(grid, 500, 400); primaryStage.setScene(scene); primaryStage.show(); }

/** * @param args the command line arguments */ public static void main(String[] args) { launch(args); }

/** * @param user the username entered * @param pword the password entered * @return isValid true for authenticated */ public boolean authenticate(String user, String pword) { boolean isValid = false; if (user.equalsIgnoreCase("sdevadmin") && pword.equals("425!pass")) { isValid = true; }

return isValid; }

}