UI Control Sample | JavaFX Tutorials and Documentation

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/*
 * Copyright (c) 2011, 2013 Oracle and/or its affiliates.
 * All rights reserved. Use is subject to license terms.
 *
 * This file is available and licensed under the following license:
 *
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 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in
 * the documentation and/or other materials provided with the distribution.
 * - Neither the name of Oracle nor the names of its
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package textfieldsample;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
public class TextFieldSample extends Application {
 @Override
 public void start(Stage stage) {
 Group root = new Group();
 Scene scene = new Scene(root, 300, 150);
 stage.setScene(scene);
 stage.setTitle("Text Field Sample");
 GridPane grid = new GridPane();
 grid.setPadding(new Insets(10, 10, 10, 10));
 grid.setVgap(5);
 grid.setHgap(5);
 scene.setRoot(grid);
 final TextField name = new TextField();
 name.setPromptText("Enter your first name.");
 name.setPrefColumnCount(10);
 name.getText();
 GridPane.setConstraints(name, 0, 0);
 grid.getChildren().add(name);
 final TextField lastName = new TextField();
 lastName.setPromptText("Enter your last name.");
 GridPane.setConstraints(lastName, 0, 1);
 grid.getChildren().add(lastName);
 final TextField comment = new TextField();
 comment.setPrefColumnCount(15);
 comment.setPromptText("Enter your comment.");
 GridPane.setConstraints(comment, 0, 2);
 grid.getChildren().add(comment);
 Button submit = new Button("Submit");
 GridPane.setConstraints(submit, 1, 0);
 grid.getChildren().add(submit);
 Button clear = new Button("Clear");
 GridPane.setConstraints(clear, 1, 1);
 grid.getChildren().add(clear);
 final Label label = new Label();
 GridPane.setConstraints(label, 0, 3);
 GridPane.setColumnSpan(label, 2);
 grid.getChildren().add(label);
 submit.setOnAction(new EventHandler<ActionEvent>() {
 @Override
 public void handle(ActionEvent e) {
 if (
 (comment.getText() != null && !comment.getText().isEmpty())
 ) {
 label.setText(name.getText() + " " +
 lastName.getText() + ", "
 + "thank you for your comment!");
 } else {
 label.setText("You have not left a comment.");
 }
 }
 });
 clear.setOnAction(new EventHandler<ActionEvent>() {
 @Override
 public void handle(ActionEvent e) {
 name.clear();
 lastName.clear();
 comment.clear();
 label.setText(null);
 }
 });
 stage.show();
 }
 public static void main(String[] args) {
 launch(args);
 }
}