JavaFX: PasswordField

PasswordField class is used to define a Password field control. PasswordField class extends TextField class and masks entered characters.

 

PasswordField class provides following constructor to define an instance.

public PasswordField()

 

In this application, I am going to build the UI controls using FXML.

 

How to set padding to GridPane?

<GridPane xmlns:fx="http://javafx.com/fxml" fx:controller="com.sample.app.widgets.controller.PasswordFieldDemoController"
	fx:id="gridPane1" 
	hgap="20" vgap="20"
	alignment="top_center">
	
	<padding>
		<Insets top="20" right="20" bottom="10" left = "30" />
	</padding>

</GridPane>

 

How to set font to a label?

<Label fx:id="userNameLabel" text="Enter user name" 
	 GridPane.rowIndex="0"
	 GridPane.columnIndex="0"
>
	 
	<font>
	 	<Font name="Verdana" size="20" />
	 </font>
		
</Label>

 

How to set effect to a label?

<Label fx:id="resultLabel" text=""
	GridPane.rowIndex="3"
	 GridPane.columnIndex="0"
	 GridPane.columnSpan="2"
>
	<font>
	 	<Font name="Verdana" size="35" />
	 </font>
	 	
	<effect>
	 	<DropShadow offsetX="3" offsetY="3">
	 		<color>
	 			<Color red="1" green="0" blue="0" opacity="0.7"/>
	 		</color>
	 	</DropShadow>
	 </effect>
</Label>

How to set action method to a button?

Using onAction attribute, you can set action method to a button.

<Button fx:id="signInButton" text="Sign In"
	GridPane.rowIndex="2"
	 GridPane.columnIndex="0"
	 onAction="#loginAction"
>
	<font>
		<Font name="Verdana" size="20" />
	</font>
</Button>

In control, you should define loginAction method like below.

@FXML
private void loginAction() {

}

Find the below working application.

 

passwordFieldDemo.fxml

<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.text.*?>
<?import javafx.scene.effect.*?>
<?import javafx.geometry.*?>
<?import javafx.scene.paint.*?>

<GridPane xmlns:fx="http://javafx.com/fxml" fx:controller="com.sample.app.widgets.controller.PasswordFieldDemoController"
	fx:id="gridPane1" 
	hgap="20" vgap="20"
	alignment="top_center">
	
	<padding>
		<Insets top="20" right="20" bottom="10" left = "30" />
	</padding>

	<Label fx:id="userNameLabel" text="Enter user name" 
	 	GridPane.rowIndex="0"
	 	GridPane.columnIndex="0"
	 >
	 
	 	<font>
	 		<Font name="Verdana" size="20" />
	 	</font>
		
	 </Label>
	 
	 <Label fx:id="passwordLabel" text="Enter password"
		GridPane.rowIndex="1"
	 	GridPane.columnIndex="0"
	 >
	 
	 	<font>
	 		<Font name="Verdana" size="20" />
	 	</font>
	 </Label>
	 
	 <TextField fx:id="userNameTextField"
	 	GridPane.rowIndex="0"
	 	GridPane.columnIndex="1" />

	 
	 <TextField fx:id="passwordTextField" 
	 	GridPane.rowIndex="1"
	 	GridPane.columnIndex="1"
	 />
	 
	<Button fx:id="signInButton" text="Sign In"
		GridPane.rowIndex="2"
	 	GridPane.columnIndex="0"
	 	onAction="#loginAction"
	>
		 <font>
	 		<Font name="Verdana" size="20" />
	 	</font>
	</Button> 
	
	<Button fx:id="clearButton" text="Clear"
		GridPane.rowIndex="2"
	 	GridPane.columnIndex="1"
	 	onAction="#clearAction"
	>
		 <font>
	 		<Font name="Verdana" size="20" />
	 	</font>
	</Button> 
	
	 <Label fx:id="resultLabel" text=""
		GridPane.rowIndex="3"
	 	GridPane.columnIndex="0"
	 	GridPane.columnSpan="2"
	 >
	 	 <font>
	 		<Font name="Verdana" size="35" />
	 	</font>
	 	
	 	<effect>
	 		<DropShadow offsetX="3" offsetY="3">
	 			<color>
	 				<Color red="1" green="0" blue="0" opacity="0.7"/>
	 			</color>
	 		</DropShadow>
	 	</effect>
	 </Label>
	
</GridPane>

PasswordFieldDemoController.java

package com.sample.app.widgets.controller;

import java.net.URL;
import java.util.ResourceBundle;

import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;

public class PasswordFieldDemoController implements Initializable {

	@FXML
	private Label userNameLabel;

	@FXML
	private Label passwordLabel;

	@FXML
	private Label resultLabel;

	@FXML
	private TextField userNameTextField;

	@FXML
	private TextField passwordTextField;

	@FXML
	private Button signInButton;

	@FXML
	private Button clearButton;

	@FXML
	private void loginAction() {
		String userName = userNameTextField.getText();
		String password = passwordTextField.getText();

		if (password == null || userName == null || userName.trim().isEmpty() || password.trim().isEmpty()) {
			resultLabel.setText("Input shouldn't be empty");
			return;
		}

		if (userName.equals("krishna") && password.equals("krishna")) {
			resultLabel.setText("Welcome Krishna");
			return;
		}

		resultLabel.setText("Wrong Credentials");

	}

	@FXML
	private void clearAction() {
		resultLabel.setText("");
		userNameTextField.clear();
		passwordTextField.clear();

	}

	@Override
	public void initialize(URL location, ResourceBundle resources) {

	}

}

PasswordFieldDemo.java

package com.sample.app.widgets;

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

public class PasswordFieldDemo extends Application {

	private static final String FXML_FILE = "/passwordFieldDemo.fxml";
	private static final String STAGE_TITLE = "Password field Demo";

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

	}

	@Override
	public void start(Stage primaryStage) throws Exception {

		Parent root = (Parent) FXMLLoader.load(this.getClass().getResource(FXML_FILE));

		Scene scene = new Scene(root, 700, 400, Color.WHITE);

		primaryStage.setTitle(STAGE_TITLE);
		primaryStage.setScene(scene);
		primaryStage.show();

	}

}

Output

Enter user name ‘krishna’ and password ‘krishna’ and click on Sign In button.

 

 

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