УП 4.1

src_Main.java

import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.geometry.VPos;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.control.TextArea;
import javafx.scene.control.TitledPane;
import javafx.scene.image.Image;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.ColumnConstraints;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.RowConstraints;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;

import java.io.FileInputStream;
import java.io.IOException;

public class Main extends Application {

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

    @Override
    public void start(Stage stage) {

        GridPane root = new GridPane();
        //root.setGridLinesVisible(true);
        root.setPrefWidth(800);
        root.setPrefHeight(120);
        ColumnConstraints columnConstraints1 = new ColumnConstraints();
        columnConstraints1.setPercentWidth(60);
        ColumnConstraints columnConstraints2 = new ColumnConstraints();
        columnConstraints2.setPercentWidth(25);
        ColumnConstraints columnConstraints3 = new ColumnConstraints();
        columnConstraints3.setPercentWidth(15);
        RowConstraints rowConstraints = new RowConstraints();
        rowConstraints.setPercentHeight(100);
        rowConstraints.setValignment(VPos.TOP);
        root.getColumnConstraints().addAll(columnConstraints1, columnConstraints2, columnConstraints3);
        root.getRowConstraints().addAll(rowConstraints);
        TextArea textArea = new TextArea();
        textArea.setWrapText(true);
        root.add(textArea, 0, 0);
        ComboBox<String> comboBox = new ComboBox<>(FXCollections.observableArrayList("Натуральное число", "Целое число", "Число с плавающей запятой", "Дата", "Время", "E-mail"));
        comboBox.setPrefWidth(Double.MAX_VALUE);
        TitledPane titledPane = new TitledPane("Type", comboBox);
        titledPane.setCollapsible(false);
        root.add(titledPane, 1, 0);
        Circle circle = new Circle();
        circle.setFill(Color.GREEN);
        BorderPane pane = new BorderPane(circle);
        pane.widthProperty().addListener(observable -> circle.setRadius(pane.getWidth() / 2.5));
        root.add(pane, 2, 0);
        textArea.textProperty().addListener((observableValue, s, t1) -> circle.setFill(Verifier.verify(t1, comboBox.getSelectionModel().getSelectedIndex()) ? Color.GREEN : Color.RED));
        comboBox.getSelectionModel().selectedItemProperty().addListener((observable, oldValue, newValue) -> circle.setFill(Verifier.verify(textArea.getText(), comboBox.getSelectionModel().getSelectedIndex()) ? Color.GREEN : Color.RED));
        Scene scene = new Scene(root);
        stage.setScene(scene);
        stage.setTitle("Type verification");
        try (FileInputStream icon = new FileInputStream("src\\regexp.png")) {
            stage.getIcons().add(new Image(icon));
        } catch (IOException e) {
        }
        stage.sizeToScene();
        stage.show();
    }
}

src_Verifier.java

import java.util.regex.Pattern;

public class Verifier {
    private static Pattern naturalPattern = Pattern.compile("^[1-9]\\d*$");
    private static Pattern intPattern = Pattern.compile("^(?:(?:[-‐−‒–—]?[1-9]\\d*)|0)$");
    private static Pattern doublePattern = Pattern.compile("^(?:0|(?:[-‐−‒–—]?(?:(?:[1-9]\\d*(?:[.,]\\d*[1-9])?)|(?:0[,.]\\d*[1-9]))(?:[eе](?:[-‐−‒–—]?[1-9]\\d*))?))$");
    private static Pattern datePattern = Pattern.compile("^(?:(?:(?:(?:(?!0000)\\d{4})-" +
            "(?:(?:(?:(?:0[1-9])|(?:1[0-2]))[-‐−‒–—](?:(?:0[1-9])|(?:1\\d)|(?:2[0-8])))|(?:(?:(?:0[13-9])|(?:1[0-2]))[-‐−‒–—](?:(?:29)|(?:30)))|(?:(?:(?:0[13578])|(?:1[02]))[-‐−‒–—]31)))" +
            "|(?:(?:(?:(?:(?:[13579][26])|(?:[2468][048])|(?:0[48]))00)|(?:\\d{2}(?:(?:[13579][26])|(?:[2468][048])|(?:0[48]))))[-‐−‒–—]02[-‐−‒–—]29)" +
            "|(?:(?:(?:(?:(?:0[1-9])|(?:1\\d)|(?:2[0-8]))\\.(?:(?:0[1-9])|(?:1[0-2])))|(?:(?:(?:29)|(?:30))\\.(?:(?:0[13-9])|(?:1[0-2])))|(?:31\\.(?:(?:0[13578])|(?:1[02]))))" +
            "\\.(?:(?!0000)\\d{4}))" +
            "|(?:(?:(?:(?:(?:0?[1-9])|(?:1[0-2]))/(?:(?:0?[1-9])|(?:1\\d)|(?:2[0-8])))|(?:(?:(?:0?[13-9])|(?:1[0-2]))/(?:(?:29)|(?:30)))|(?:(?:(?:0?[13578])|(?:1[02]))/31))" +
            "/(?:(?!0000)\\d{4}))" +
            "|(?:(?:(?:29\\.02\\.)|(?:0?2/29/))(?:(?:(?:(?:[13579][26])|(?:[2468][048])|(?:0[48]))00)|(?:\\d{2}(?:(?:[13579][26])|(?:[2468][048])|(?:0[48]))))))" +
            "(?: ?(?:(?:[BA]C)|(?:(?:до )?(?:(?:н\\. ?э\\.)|(?:нашей эры)))))?)$");
    private static Pattern timePattern = Pattern.compile("^(?:(?:(?:[1-9]|(?:1[0-2]))[.:][0-5]\\d ?(?:(?:[ap]\\. ?m\\.)|(?:[AP]M)))" +
            "|(?:(?:(?:[01]\\d)|(?:2[0-3]))[.:][0-5]\\d))$");
    private static Pattern emailPattern = Pattern.compile("^[-a-z0-9!#$%&'*+/=?^_`{|}~]+(?:\\.[-a-z0-9!#$%&'*+/=?^_`{|}~]+)*@(?:[a-z0-9](?:[-a-z0-9]{0,61}[a-z0-9])?\\.)+" +
            "(?:aero|arpa|asia|biz|cat|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|org|pro|tel|travel|[a-z][a-z])$");

    public static boolean verify(String text, int index) {
        if (text.length() == 0)
            return true;
        switch (index) {
            case 0:
                return naturalVerify(text);
            case 1:
                return intVerify(text);
            case 2:
                return doubleVerify(text);
            case 3:
                return dateVerify(text);
            case 4:
                return timeVerify(text);
            case 5:
                return emailVerify(text);
            default:
                return true;
        }
    }

    private static boolean naturalVerify(String text) {
        return naturalPattern.matcher(text).matches();
    }

    private static boolean intVerify(String text) {
        return intPattern.matcher(text).matches();
    }

    private static boolean doubleVerify(String text) {
        return doublePattern.matcher(text).matches();
    }

    private static boolean dateVerify(String text) {
        return datePattern.matcher(text).matches();
    }

    private static boolean timeVerify(String text) {
        return timePattern.matcher(text).matches();
    }

    private static boolean emailVerify(String text) {
        return emailPattern.matcher(text).matches();
    }
}