javafx : Login example with image view.

1.Main.java

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


public class Main extends Application {
	Stage window;
	
	@Override
	public void start(Stage primaryStage) {
		window = primaryStage;
		try {
			Parent root = FXMLLoader.load(getClass().getResource("Login.fxml"));
			Scene scene = new Scene(root,600,300);
			scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
			primaryStage.setScene(scene);
			primaryStage.show();
		} catch(Exception e) {
			e.printStackTrace();
		}
	}
	
	public void close_window() {
		window.close();
	}
	
	public static void main(String[] args) {
		launch(args);
	}
}

2.Login.fxml

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

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.PasswordField?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.image.Image?>
<?import javafx.scene.image.ImageView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>

<AnchorPane prefHeight="300.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.MainController">
   <children>
      <TextField fx:id="username" layoutX="38.0" layoutY="90.0" promptText="Username">
         <font>
            <Font size="18.0" />
         </font>
      </TextField>
      <PasswordField fx:id="password" layoutX="39.0" layoutY="150.0" promptText="Password">
         <font>
            <Font size="18.0" />
         </font>
      </PasswordField>
      <Label fx:id="status" alignment="CENTER" layoutX="35.0" layoutY="47.0" prefHeight="27.0" prefWidth="224.0" text="Status" textFill="#191cdd">
         <font>
            <Font size="18.0" />
         </font>
      </Label>
      <Button layoutX="112.0" layoutY="224.0" mnemonicParsing="false" onAction="#login">
         <font>
            <Font size="18.0" />
         </font>
         <graphic>
         	<ImageView fitHeight="100.0" fitWidth="150.0" layoutX="330.0" layoutY="75.0" pickOnBounds="true" preserveRatio="true">
         		<image>
            		<Image url="img/loginBtn.jpg" />
         		</image></ImageView>
         </graphic>
      </Button>
      <ImageView fitHeight="150.0" fitWidth="200.0" layoutX="330.0" layoutY="75.0" pickOnBounds="true" preserveRatio="true">
         <image>
            <Image url="img/login.png" />
         </image></ImageView>
   </children>
</AnchorPane>

3.MainController.java

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.stage.Stage;

public class MainController {
	Main m = new Main();
	
	@FXML
	private Label status;
	@FXML
	private TextField username;
	@FXML
	private TextField password;
	
	public void login(ActionEvent event) {
		if(username.getText().equals("sharif") && password.getText().equals("123")) {
			status.setText("Login Success!");
			try {
				Parent root = FXMLLoader.load(getClass().getResource("Main.fxml"));
				Scene scene = new Scene(root,300,300);
				Stage primaryStage = new Stage();
				scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
				primaryStage.setScene(scene);
				primaryStage.show();
			} catch(Exception e) {
				e.printStackTrace();
			}
		}
		else {status.setText("Login not Success!");}
	}
}

4.Main.fxml

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

<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>


<AnchorPane minHeight="300.0" prefWidth="300.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8.0.171">
   <children>
      <Label alignment="CENTER" layoutX="9.0" layoutY="133.0" prefHeight="17.0" prefWidth="281.0" text="Main Window">
         <font>
            <Font size="18.0" />
         </font>
      </Label>
   </children>
</AnchorPane>